229 results about "Material Deformation" patented technology

The invention discloses a metal material hole evolution behavior simulation method influenced by multi-structure characteristics, and particularly relates to the technical field of metal material deformation damage prediction. The metal material hole evolution behavior simulation method influenced by the multi-structure characteristics comprises the following steps: (1) obtaining metal material microstructure information through characterization, and obtaining metal material hole internal distribution information through industrial CT detection; (2) constructing a representative volume unit containing multi-organization characteristics and hole distribution; (3) applying a periodic boundary condition to the RVE; (4) carrying out deformation behavior simulation calculation on the RVE under different loading conditions; and (5) obtaining the evolution behavior that the hole volume of the metal material is increased along with the deformation. The novel modeling method is developed, the second phase distribution density can be flexibly changed, non-uniform construction is achieved, the real microstructure characteristics of the metal material can be accurately reflected, and optimization of the preparation process of the high-performance metal material is facilitated.

The invention discloses a spinning forming dislocation evolution prediction and process optimization method based on multi-scale modeling, which combines three calculation methods with different scales and levels, namely macroscopic finite element simulation, microcosmic crystal plasticity simulation and microcosmic dislocation dynamics simulation. A complete perspective from macroscopic mechanical behaviors to microscale mechanical response and dislocation density evolution and then to microscale single dislocation motion and interaction mechanism can be provided, so that the plastic forming process of the metal material can be understood more comprehensively. Not only are the prediction precision and reliability improved, but also the understanding depth of the material deformation behavior and the influence factors thereof is enhanced. By integrating information of different scales, key characteristics such as macroscopic stress, strain distribution, grain deformation response, dislocation density evolution and movement and interaction of a single dislocation of the material in the plastic forming process can be predicted more accurately. Meanwhile, in combination with multi-scale simulation, process parameters can be optimized to obtain better forming quality and performance.

The invention discloses a deep learning-based machining surface plastic deformation measurement method and system, and belongs to the technical field of metal cutting machining. According to the method, a parallel encoder-decoder structure is adopted, and spatial and temporal features and spatial features of a deformed image pair are fully extracted through multi-layer multi-scale convolution contraction and expansion and are used for predicting a deformation field. A double-attention mechanism module is introduced, position and channel characteristics are combined more effectively, efficient and high-precision measurement of a material deformation field is achieved, and a traditional digital image correlation method can be effectively replaced. According to the method, a Boolean model is used for generating an initial speckle capable of approaching a real environment, a simulated deformation image pair is obtained through image distortion, and the availability of a virtual data set is evaluated by using an autocorrelation full width at half maximum, a system error, a random error and an average gray scale gradient; a large number of high-quality data sets for deep learning training are efficiently provided, so that the model is free from limitation of a real data set, and the generalization of the model is improved.

The invention discloses a material deformation collaborative acquisition test method, device and equipment and a storage medium, and relates to the technical field of material testing, and the method comprises the following steps: carrying out EBSD calibration on the sample surface of a to-be-tested sample; preparing speckles on the surface of the sample and carrying out in-situ loading so as to carry out DIC determination; removing speckles on the target to-be-tested sample, and returning to execute the step of EBSD calibration based on the to-be-tested sample after speckle removal until in-situ loading of the target to-be-tested sample reaches a preset loading target; and determining an EBSD test result and a DIC test result based on the obtained measurement results of the internal grain orientation information and the material strain information of each sample to be tested. The method does not need to consider the influence of DIC on EBSD calibration, breaks through the limitation of the electron beam on the size of speckle particles or the size of a DIC observation area in EBSD calibration, and improves the test efficiency of material deformation collaborative collection.

The frequency converter shell stamping device particularly relates to the technical field of frequency converter production and comprises a machine shell, a plurality of machine legs are fixedly connected to the lower end of the machine shell, a containing plate is fixedly connected to the inner surface of the machine shell, an upper die is fixedly installed at the lower end of a hydraulic cylinder, and a conveying and oil spraying assembly is arranged on the inner surface of the machine shell. A cooling supporting assembly is arranged on the inner surface of the lower mold and the inner surface of the upper mold. According to the frequency converter shell stamping device, by arranging the oil spraying mechanism, lubricating oil is sprayed to the upper die and the lower die, meanwhile, an aluminum alloy plate in the moving process can be sprayed, friction can be effectively reduced, abrasion between the dies and materials in the stamping process is reduced, the service life of the dies is prolonged, and meanwhile, the production efficiency is improved. And the lubricating oil can improve the stability in the stamping process, reduce the risks of material deformation, wrinkles and cracks, and ensure the surface quality and dimensional precision of the aluminum alloy plate.

The invention relates to the technical field of steel structure welding, and discloses a bridge U rib plate welding device which comprises a portal frame and a bearing plate arranged below the portal frame and further comprises a welding assembly arranged on the portal frame. The bearing assembly is arranged on the bearing plate; the clamping assemblies are arranged at the two ends of the U-shaped rib plate; the pressure assembly is tightly attached to the upper portion of the U-shaped rib plate and used for pressing the U-shaped rib plate and the bottom plate; the blocking assembly is arranged on the portal frame and used for blocking the pressure assembly; when the bearing plate penetrates through the portal frame in the direction perpendicular to the portal frame, the U-shaped rib plate is welded to the bottom plate through the welding assembly, and the multiple sets of pressure assemblies are sequentially blocked in front of a welding point through the blocking assembly. According to the U rib plate welding device for the bridge, the positioned welding procedure is reduced, welding is conducted while clamping is conducted, and material deformation and stress concentration caused by positioned welding are reduced; welding is carried out while clamping is carried out, the independent positioning welding procedure can be omitted, production steps are reduced, and therefore the production progress is accelerated.

According to the precise cutting machining method and system for the soft material, firstly, the three-dimensional model and the cutting parameters of the material are obtained, the initial cutting track is generated, in the cutting process, material deformation is monitored in real time through the multi-sensor fusion technology, the cutting track and depth are adjusted through the dynamic compensation algorithm, and the cutting precision is improved. And meanwhile, a laser interference measurement system is adopted to track the position of a cutting tool, and micron-level precision is achieved through closed-loop feedback control. According to the method, pressure control and cutting depth adjustment are combined, a specific microstructure is created to achieve differential friction coefficients, in addition, the surface chemical composition is monitored through real-time spectrum analysis, and it is ensured that the preset surface characteristic requirement is met. The cutting track, depth and surface texture of the soft material can be accurately controlled, high-precision and customizable soft material machining is achieved, and key technical support is provided for intelligent machining in the fields of flexible electronics, bionic robots and the like.

The invention provides a segmented forging high-precision half shaft forging method and equipment, and the method comprises the steps: firstly, obtaining material basic data, building a multi-physical field coupling model, and setting initial forging parameters to predict material deformation and stress distribution; then, calculating the pre-deformation shape and size of the half shaft based on the deformation data by using a pre-deformation reverse algorithm; then, the deformation trend is analyzed, forging parameters are reset, and the new pre-deformation shape and size are predicted; and if the data does not meet the precision requirement, repeating the steps until the precision requirement is met. Once the precision requirement is met, forging parameters are output and applied to a production line. According to the method, the forging process is accurately predicted through the multi-physics field coupling model, the blank shape is optimized, closed-loop parameter adjustment is formed, the forging precision is improved, the residual stress is reduced, the stress distribution uniformity is improved, and the product percent of pass is improved through an iterative optimization strategy.

The invention relates to the technical field of vulcanized rubber processing, and discloses an intelligent vulcanized rubber processing system and method. According to the method, a physical property parameter set of a rubber raw material and real-time working condition data of vulcanization equipment are obtained, the physical property parameter set comprises the rubber content, the filler distribution density and the heat conduction coefficient, and the real-time working condition data comprises a vulcanization temperature curve, a pressure gradient sequence and a mold state identifier; multi-modal feature fusion processing is carried out on the physical property parameter set and the real-time working condition data, a feature fusion atlas containing thermodynamic response features and mechanical stress distribution is generated, and the atlas is associated with a phase change critical point and a material deformation track in the vulcanization process; and finally, a process parameter optimization model is called to perform dynamic scheduling analysis on the feature fusion atlas, and a vulcanization process control instruction set containing a time sequence operation sequence based on the temperature compensation parameters and the pressure adjustment step length is generated.

The invention relates to an intelligent embroidering path optimization and execution method and system for net cap embroidering in the technical field of intelligent manufacturing, and the method comprises the steps: obtaining a supporting point coordinate from a high-curvature region, employing finite element analysis to simulate a material deformation behavior, obtaining a deformation prediction matrix, and determining the tension distribution of a flexible structure; a supporting path plan is generated and used for deployment of the fixing device; real-time compensation parameters are generated in combination with the curved surface geometric model, material displacement is monitored in the embroidering process through a feedback control mechanism, and a displacement compensation vector is obtained and used for real-time correction of the stitch direction; according to the contact stability after angle deviation data processing, a final embroidery execution sequence is generated, a synchronous driving algorithm is adopted to coordinate the movement of the fixing device and the embroidery machine, and continuous stitch output is obtained to determine that the pattern precision meets the requirement; and obtaining production log data from continuous stitch output, evaluating an overall efficiency index by adopting a data analysis method, and obtaining an optimized feedback cycle for processing and adjusting a next curved surface structure.

The invention discloses a multiphase alloy plastic constitutive model and a modeling method.The modeling method of the multiphase alloy plastic constitutive model comprises the steps that dynamic stress-strain data at different temperatures are obtained by designing a Hopkinson pressure bar experiment, and a JC-TANH constitutive model considering the flow softening effect is adopted; the model parameters are fitted and verified on the basis of experimental data, a data set under a large deformation condition is constructed, parameter determination is performed on the established plastic stress constitutive model on the basis of the data set, and finally construction of the alloy plastic constitutive model considering the dynamic recrystallization effect is completed. The model not only describes the influence of phase change on the material performance, but also can reflect the material softening caused by dynamic recrystallization, and the method provides guidance for the material modeling method considering the microstructure effect, and is of great significance for deeply revealing the microcosmic nature of the deformation and removal mechanism of the cutting material.

The invention provides a carbide evolution real-time monitoring method and device, a terminal and a storage medium, and relates to the technical field of material deformation measurement. The method comprises the following steps: acquiring a plurality of images at different stretching stages in the in-situ stretching process of a metal sample; wherein the metal sample is subjected to surface modification and fluorescence labeling; identifying a fluorescence intensity gradient in each image; and converting the fluorescence intensity gradient of each image into a stress value to obtain stress distribution of the surface of the metal sample in the image, and obtaining a carbide evolution monitoring result of the metal sample based on the stress distribution of the surface of the metal sample in each image. According to the invention, the real-time visualization of the carbide evolution process and the influence on the matrix and mechanical properties can be realized.

The invention relates to the technical field of precision spring manufacturing and automatic control, in particular to a spring forming online control system and method. The system comprises a dynamic modeling module, a disturbance observation module, an impedance decoupling module and a trajectory correction module. The system calculates disturbance torque by constructing a mechanical transmission dynamics reference model and collecting servo parameters; the core of the method is to decouple a material deformation impedance component representing transient rheological characteristics of a wire rod from a disturbance torque, generate a position correction instruction based on an elastic-plastic compensation model, and dynamically adjust a forming track in a current period; according to the invention, the servo motor is multiplexed as a virtual probe, the hysteresis of visual detection is eliminated, the strength fluctuation of the wire rod can be effectively handled, and the product consistency is obviously improved.

The invention relates to an ultrasonic-assisted longitudinal-torsional compound vibration two-roller rolling device, and belongs to the technical field of ultra-thin strip rolling. According to the device, the ultrasonic longitudinal-torsional vibration device is combined with the rolling mill, so that the deformation resistance of materials is effectively reduced, the surface roughness is improved, grains are refined, and the residual stress is reduced by utilizing ultrasonic vibration. The device comprises a rolling mill rack, an ultrasonic longitudinal-torsional vibration device, a winding device, a winding assisting device and an unwinding device. The ultrasonic longitudinal-torsional vibration device is composed of a variable-amplitude roller shaft, a connecting shaft, piezoelectric ceramics, a copper electrode, a rear cover plate and a hexagon socket screw, and has a single-excitation form and a double-excitation form. The single excitation device adopts a quarter-wavelength conical amplitude-change pole, a spiral groove is formed in the conical surface of the quarter-wavelength conical amplitude-change pole, and longitudinal vibration can be partially converted into torsional vibration; according to the double-excitation device, the torsional vibration amplitude is increased through cooperation of two longitudinal-torsional amplitude-change poles which are symmetrically arranged. The device is compact in structure, small in energy loss, high in machining precision and suitable for production of high-precision ultra-thin strips.

A method for preparing a shear-assisted extruded material from a powder billet is provided, the method comprising providing a billet of material in substantially powder form; applying both axial and rotational pressure to the material to deform at least some of the contacted material; and extruding the material to form an extruded material. A method for preparing shear-assisted extruded material is provided, the method comprising applying both axial and rotational pressure to stock material to form an extruded material at a rate between 2 and 13 m / min. A method for preparing shear-assisted extruded material is provided. The method comprises applying both axial and rotational pressure to stock material to form an extruded material; and aging the extruded material for less than 3 hours. A method for preparing shear-assisted extruded material is provided. The method comprises providing a stock material for shear-assisted extrusion; and applying both axial and rotational force to the stock material to form an extruded material, wherein the axial force does not decrease during the extrusion.

The invention discloses an intelligent upsetting riveting method of an automatic drilling and riveting machine based on force-position hybrid control, and relates to the field of intelligent riveting control, and the method comprises the following steps: driving a riveting shaft to be fed to a preset approaching area at a first movement speed through a position control mode; based on real-time displacement feedback and dynamic error judgment of a target position, a control mode is triggered to be seamlessly switched to a force control mode; in the force control mode, force signals fed back by a pressure sensor are synchronously collected through a distributed real-time I / O system; when the force signal reaches a dynamically-calibrated preset threshold value, the feeding motion of the riveting shaft is stopped immediately to complete upsetting and riveting forming; and then the riveting shaft is controlled to reversely break away from the riveting area at the second movement speed. According to the scheme, the control precision and stability of riveting force can be remarkably improved, riveting force fluctuation caused by material deformation or external interference is effectively restrained, and therefore the consistency of upset head forming quality and the reliability of a connecting structure are guaranteed.

The utility model discloses a high-temperature fretting fatigue testing device, which belongs to the technical field of tenon connection structure testing and comprises an upper clamp and a lower clamp which are used for fixing a tenon sample and applying acting force to the tenon sample, and a digital integrated circuit (DIC) camera used for observing material deformation and crack progress of the tenon sample, a micro-motion cushion block used for supporting a tenon sample is arranged in the upper clamp, the upper clamp is sleeved with an electromagnetic induction coil, the electromagnetic induction coil is located at the contact area of the tenon sample and the micro-motion cushion block, an observation window is arranged between every two adjacent turns of coils of the electromagnetic induction coil, and the DIC camera faces the observation window and is as high as the observation window; the observation window is reserved between the two turns of coils, and the material deformation and crack initiation progress of the tenon sample can be recorded in real time through the DIC camera; and the clamp is connected with the bearing seat through the joint bearing, so that self-centering of the tenon sample can be realized, deflection torque is prevented from being introduced, and the shape control precision of a friction surface of a contact area is improved.

The invention discloses a method for regulating and controlling the yield ratio of a TB13 titanium alloy wire and the TB13 titanium alloy wire, and belongs to the technical field of titanium alloy machining. In order to realize regulation and control of the yield ratio of a beta-type TB13 titanium alloy wire, the invention provides a method for regulating and controlling the yield ratio of the TB13 titanium alloy wire, and the method comprises the following steps: sequentially carrying out cold drawing rounding, scaling, drawing, intermediate pass heat treatment and annealing on a TB13 titanium alloy disc with the diameter phi of 8.5-9.5 mm. According to the method, a roller die cold drawing deformation machining mode is adopted, different intermediate pass annealing treatment and finished product annealing treatment processes are combined, the number, form and distribution of alpha phases separated out in a beta matrix are changed, separated-out alpha-phase particles can interact with dislocation, dislocation slippage motion resistance is increased in the material deformation process, and the mechanical property of the material is improved. And thus, the yield strength, the tensile strength and the yield ratio of the finished beta-type TB13 wire are effectively regulated and controlled.

The invention discloses a water-lubricated thrust bearing and a performance monitoring method thereof, and relates to the technical field of bearings. The water lubrication thrust bearing comprises a tilting pad, the tilting pad comprises a pad seat and an elastic layer, and the elastic layer is of a honeycomb structure; the honeycomb structure comprises a plurality of honeycomb units, and the aperture of the honeycomb unit close to the middle of the elastic layer is smaller than that of the honeycomb unit close to the edge of the elastic layer; the invention further discloses a performance monitoring method of the water-lubricated thrust bearing. The working performance of the elastic layer is measured and evaluated through the temperature measuring sensor and the vibration measuring sensor. Based on the technical scheme disclosed by the invention, not only can the structural stability and the bearing capacity of the bearing be enhanced, but also the vibration and noise reduction effect, the heat management capacity and the fatigue resistance of the elastic layer can be improved, and material deformation and cracks are reduced, so that the service life of the bearing is prolonged.

The invention belongs to the technical field of material processing and manufacturing, and particularly relates to a multi-process complex loading process material deformation and performance unified prediction method and application thereof. Aiming at the technical defects of an existing material constitutive model in the aspects of cross-process applicability, multi-process historical effect characterization and formation-structure-performance whole-process unified evaluation, a unified internal variable system is constructed; by combining a multi-process unified constitutive theory, a multi-process composite loading path calibration method and a multi-data source collaborative parameter identification and simulation integration technology, unified prediction of deformation behaviors, structure evolution and post-forming performance of materials under different forming processes, different loading modes and complex historical paths is realized. Compared with the prior art, the method of the invention makes significant technical progress in the aspects of model versatility, prediction precision and engineering implementation convenience.

The invention discloses a flexible metal material three-dimensional length measurement system based on a rotary camera mechanism, which is used for solving the problems that the existing contact measurement is easy to cause material deformation, the non-contact measurement is poor in adaptability to high-reflection / low-texture materials and the like. Comprising a rotary camera module (an industrial camera collects images at multiple angles along a semicircular guide rail), a visual calibration module (an ArUco code and a photoelectric sensor realize pose calibration and triggering), a texture enhancement module (structured light / random noise projection optimization feature extraction), a three-dimensional reconstruction module (a multi-view three-dimensional reconstruction algorithm generates point cloud) and an error compensation module (an error compensation module). And a material perception weighted least square fitting and neural network dynamic correction error) and a control splicing module. The bending deformation error of the material is eliminated through non-contact three-dimensional measurement; in combination with texture enhancement and error compensation mechanisms, the measurement precision of high-reflection materials such as aluminum foils and stainless steel bands is improved; and a modular integrated design is adopted, and automatic production line deployment is adapted.

The invention discloses a cutting device adapting to the curvature of a metallized film, and relates to the field of metallized film cutting, the cutting device comprises a workbench and an adapting mechanism used for adapting to the curvature of the metallized film, the upper surface of the workbench is fixedly provided with an inverted-U-shaped supporting frame through bolts, and the supporting frame is fixedly provided with a transverse plate located below a top plate; a lead screw is arranged between the upper portion of the transverse plate and the top plate of the supporting frame, the adaptation mechanism comprises a sensing assembly and an adjusting assembly, the sensing assembly is arranged in the transverse cutting direction of the blade and used for feeding back metallized film transverse deflection curvature data to an external controller, and the adjusting assembly is used for dynamically adjusting the cutting angle of the tool rest according to the fed-back data. And the cutting track of the blade is matched with the transverse curvature change of the film. According to the invention, the local curvature change of the metallized film caused by winding, tension change or base material deformation can be accurately matched, and the problems of uneven notch, edge burr and the like caused by uneven stress during cutting of a rigid cutter are effectively avoided.

The invention discloses a preparation method of a TC4 titanium alloy supercritical specification bar for an aero-engine with equiaxed structure uniformity, which is characterized in that a TC4 titanium alloy ingot is used, the bar is fully deformed through multi-dimensional upsetting and drawing in radial and transverse extension directions in a forging mode of two upsetting and two drawing in each heating number, the deformation amount in each heating number is 80-95%, and the deformation amount in each heating number is 80-95%; the upsetting and drawing temperature is carried out in a beta-phase region or a two-phase region, and finally the supercritical equiaxed structure bar with the diameter phi of 600-900 mm is obtained. According to the method, the composite forging technology of single-heating-number two-upsetting and two-drawing and multi-dimensional reversing upsetting and drawing is adopted, the material deformation amount is increased, the core structure is more fully broken, the structure uniformity of the TC4 titanium alloy large-specification bar is improved, structure equiaxing is achieved, the forged bar with the performance meeting the technical requirements of an aero-engine is obtained, industrial production is achieved, and the method is suitable for industrial production. And the processing and application potential of the titanium alloy is widened.

The invention discloses a path optimization method, system and device for flexible material deformation and a medium, and relates to the technical field of path optimization, and the method comprises the steps: obtaining a flexible material image of a to-be-matched flexible material; preprocessing the flexible material image; feature point detection is carried out on a target cutting piece in the preprocessed flexible material image, and a target feature array is constructed according to detected feature points; extracting a CAD graph according to the detected feature points, and constructing a reference feature array and a reference path array according to preset feature points of the CAD graph; performing feature point matching processing on the target feature array and the reference feature array; constructing an affine transformation matrix according to the matched target feature array and reference feature array; performing affine transformation processing on the reference path array according to the affine transformation matrix to generate a target path array; and constructing a cutting path according to the target path array. According to the method, the local deformation of the flexible material can be reasonably compensated, so that the cutting path is optimized.

The invention discloses a titanium alloy deformation behavior testing device and method, and relates to the technical field of material deformation testing, the titanium alloy deformation behavior testing device comprises a universal testing machine, a clamping module, an ultrasonic vibration module, an electric pulse excitation module and a cooperative control module, the clamping module comprises a ceramic chuck main body, and a conductive contact is arranged on the clamping surface of the ceramic chuck main body; the ultrasonic vibration module comprises an ultrasonic vibrator, and the ultrasonic vibrator is arranged on one side of the ceramic chuck body and used for applying an ultrasonic vibration signal to the titanium alloy sample; the electric pulse excitation module is connected with the conductive contact and is used for applying an electric pulse signal to the titanium alloy sample; the cooperative control module is connected with the clamping module, the ultrasonic vibration module and the electric pulse excitation module. According to the invention, synchronous loading of mechanical load, electric pulse and ultrasonic vibration can be realized, and the clamping module solves the problems of electric conduction, vibration transmission and interference resistance, so that the deformation behavior of the titanium alloy in the electro-acoustic composite field can be accurately and reliably tested.

The invention relates to the technical field of engineering material deformation analysis, in particular to a rock-fill dam stress deformation analysis method and device based on a neural network constitutive model, and the method comprises the steps: obtaining a stress tensor for rock-fill dam stress deformation analysis; inputting the stress tensor into a neural network constitutive model constructed by a generalized plastic theory so as to convert the stress tensor into a stress state in a triaxial stress space, calculating an accumulated absolute volume strain increment, a shear strain and an accumulated absolute shear strain increment, and respectively predicting variables in different soil bodies so as to output stress increments; and generating a stress deformation analysis result of the rock-fill dam according to the stress increment. Therefore, the problem that a data-driven constitutive model is insufficient in generalization, training data is difficult to obtain and calculation stability is poor, so that the data-driven constitutive model is difficult to be suitable for rock-fill dam stress deformation prediction of complex engineering in the prior art is solved.

The present invention discloses a method for preparing TC4 titanium alloy supercritical gauge rods for aircraft engines with equiaxed microstructure uniformity. The method uses a TC4 titanium alloy ingot, forging it with two upsetting and two drawing cycles per fire, and fully deforming the rods through multi-dimensional upsetting and drawing in the radial and transverse directions. The deformation amount per fire is 80-95%, and the upsetting temperature is carried out in the β phase or two-phase region. The result is an equiaxed microstructure rod with a diameter of 600-900 mm and a supercritical microstructure. The present invention utilizes a composite forging process of two upsetting and two drawing cycles per fire and multi-dimensional reversing upsetting and drawing to increase the material deformation, more fully break up the core microstructure, improve the microstructure uniformity of large-size TC4 titanium alloy rods, achieve equiaxed microstructure, and obtain forged rods with performance that meets the technical requirements of aircraft engines. This allows for industrialized production and expands the processing and application potential of titanium alloys.

The invention discloses a backlight structure with an NFC (Near Field Communication) function, which comprises a backlight rubber frame of which the bottom non-NFC function area is provided with a locally injection-molded iron frame; the heat dissipation copper foil and the module FPC are attached to the upper surface of the iron frame; the difference between the shrinkage rate of the iron frame and the shrinkage rate of the backlight rubber frame is smaller than a preset threshold value, so that material deformation is restrained when the environment temperature changes. The NFC function requirement of the whole machine is met, material environment testing characteristics are considered, and compared with a pure rubber frame, the backlight intensity is high, and material environment testing performance is compatible.

The present invention relates to the field of deformation monitoring, and particularly to a method and system for monitoring the deformation of magnetic materials. The method first obtains the magnetization curves and deformation amounts of each magnetic material in the same production batch, and uniformly selects a plurality of positions to be measured on the horizontal axis of the coordinate system. According to the distribution of the magnetic induction intensity and the distribution of the deformation amount at the target positions to be measured of the reference magnetic material of the target magnetic material, the deformation evaluation ability of the magnetization curve of the target magnetic material at the target positions to be measured is obtained. Furthermore, the importance of each position to be measured is analyzed, and key positions to be measured are screened out from all the positions to be measured. Based on the magnetic field intensity and magnetic induction intensity of the magnetization curves of each magnetic material at the key positions to be measured, and the deformation amounts of each magnetic material, a deformation monitoring model is constructed, and the deformation monitoring model is used to monitor the deformation of the magnetic materials to be monitored. The present invention can improve the accuracy of monitoring the deformation of magnetic materials.

The invention relates to an air guiding device in a vehicle rear area, comprising a tailgate (5) having a rear window (7) on the opposite side edges of which in the vehicle transverse direction (y) a side spoiler (11) is arranged, which can be adjusted between a retracted position and an extended position when an actuating force is applied. According to the invention, the actuating force is accompanied by a material deformation, in particular material bending, of the side spoiler (11), during which the side spoiler (11) can be adjusted while changing its shape.