27 results about "Stress control" patented technology

This invention discloses a temperature-compensated seepage-shear coupling true triaxial testing apparatus and control method. The apparatus includes a pressure chamber, a shear box, a temperature control system, a pressure application system, and a temperature-displacement corrector. The shear box is housed within the pressure chamber. The temperature control system includes a heat transfer jacket, multi-point thermometers, and a temperature controller. The heat transfer jacket is fitted over the shear box, and the multi-point thermometers are located within the cavity. The pressure application system includes a confining pressure loading device, a pressure head, and a pressure controller. The confining pressure loading device injects a confining pressure medium into the pressure chamber, and the pressure head applies a force to the shear box. The temperature-displacement corrector is electrically connected to the temperature control system and the pressure application system. This apparatus features a temperature control system to precisely regulate the temperature during the test, thereby simulating deep environments at different temperatures. Furthermore, the temperature-displacement corrector dynamically corrects the force applied by the pressure application system, reducing additional forces caused by thermal expansion or contraction and improving stress control accuracy.

Aspects of the present disclosure provide a method for creating a product-like surrogate test wafer that mimic a product wafer. For example, the method can include providing a second wafer, forming a stress control layer on the second wafer, and activating the stress control layer according to a first bow measurement of a first wafer to modify an internal stress of the stress control layer such that the second wafer and the stress control layer form a surrogate wafer that has a second bow measurement substantially equal to the first bow measurement.

This invention discloses a battery casing, battery assembly, vehicle, and a method for thermal management and stress control. The battery casing includes an open box, with a soft liner provided on the inner side of the box wall and / or bottom. The soft liner is sealed to the box and forms a sandwich cavity. The box has a medium inlet and a medium outlet communicating with the sandwich cavity. When pressurized heat exchange medium is introduced into the sandwich cavity, it expands the soft liner to fit tightly against the outer peripheral surface of the battery cell inside the box, thereby eliminating interfacial thermal resistance and achieving efficient heat exchange. By sensing the current pressure value of the heat exchange medium in the sandwich cavity and comparing it with a preset target pressure range, the supply pressure can be actively adjusted to maintain the expansion of the battery cell by the soft liner within the optimal stress range, and the supply pressure adjustment and flow rate adjustment are controlled independently. This invention integrates thermal management, support, stress servo, and thermal runaway protection functions into one unit, solving the contradiction between heat dissipation and stress caused by the cell breathing effect, and significantly improving battery safety and lifespan.

The composite electric stress control tape is mainly composed of a backing layer and an adhesive layer, wherein the backing layer is a plasticized PVC film layer; the raw material components of the adhesive layer mainly include base rubber, dielectric filler, conductive filler, plasticizer, tackifier, reinforcing filler and antioxidant. The composite electric stress control tape has excellent mechanical and electrical properties, thereby ensuring the integrity, stability and reliability of the product during long-term use.

The application relates to the technical field of bridge engineering structure test, and discloses a self-anchored suspension bridge scale model mechanical simulation and structure monitoring system, which comprises a physical test bed end, a computer-aided simulation end, and simulation modeling modules, tension solution modules, loading simulation modules, monitoring and evaluation modules and damage identification modules arranged in the system. The equivalent model is constructed through the simulation end and the physical assembly is guided, the nonlinear iteration is used to output the bridge tension control coordinate matrix to guide the entity main cable erection and the cable tension, the limit state safety evaluation is carried out by comparing the measured data with the theoretical benchmark data after the load state is established, the structural defects are introduced into the entity model to extract the measured modal parameters, and the element stiffness matrix of the simulation model is corrected in reverse. The application realizes the data interaction and closed-loop correction of computer simulation and physical test, and effectively improves the stress control precision of the complex bridge in the bridge state and the structural damage identification accuracy.

The application provides a wire cutting method for arc beryllium sheet. The method comprises the following steps: simulating the influence of stress release of the arc beryllium sheet on the arc when the arc beryllium sheet is cut from a blank by using simulation software; reserving arc compensation for deformation caused by stress release of the arc beryllium sheet according to the simulation result of the simulation software, processing the inner and outer arcs of the arc beryllium sheet by wire cutting in sections, then finishing the surface degree to reach the use requirement, and cutting off the two ends to obtain the arc beryllium sheet semi-finished product; wherein cutting fluid is used in wire cutting; the arc beryllium sheet semi-finished product is cut by using the taper cutting function of the wire cutting machine tool, and the R angle of the two ends is cut to obtain the arc beryllium sheet. The application solves the problems of complex processing procedure and low yield of the arc beryllium sheet, and improves the yield and service life; the application simplifies the technological process by fully utilizing the functions of the wire cutting itself through material stress control, cutting fluid improvement and cutting process improvement, and the operation process is simple.

The application provides a stress control-based embankment post-earthquake settlement recovery system and method, which can be applied to the technical field of roadbed engineering and geotechnical engineering, and comprises a bag assembly, a plurality of bags in series arranged at the intersection of a retaining wall and embankment fill, and a grouting pipeline connecting the plurality of bags; a plurality of sensors, including an acceleration sensor arranged in the fill for monitoring the horizontal acceleration of the fill, and a settlement sensor arranged at the bottom of the embankment for monitoring the vertical settlement of the embankment; and a processing device configured to process the sensing data of the plurality of sensors, generate at least one control signal, and control the execution equipment based on the control signal to process the horizontal stress in the earthquake and the embankment settlement after the earthquake.

This application provides a stress corrosion testing device and method, relating to the field of stress corrosion testing technology. The testing device includes a testing drive mechanism and multiple testing units, which are connected sequentially along the testing direction of the sample. Each testing unit includes a first clamping part, a second clamping part, a connecting structure, and a locking mechanism. The first clamping part is configured to fix one end of the sample; the second clamping part is configured to fix the other end of the sample; the connecting structure connects the first and second clamping parts, restricting their relative movement only along the testing direction of the sample; the locking mechanism is configured to lock the first and second clamping parts when the sample reaches a preset condition. This avoids the problem of stress control drift in other testing units caused by the fracture of a single sample, improving the accuracy and stability of the test results for other testing units.

This invention discloses a pulsed electromagnetic field-based method for controlling residual stress in the entire manufacturing process of titanium alloy components. Belonging to the technical field of residual stress control in titanium alloy parts, the method includes: dividing the entire manufacturing process of titanium alloy components into manufacturing stages; spatially partitioning the titanium alloy components and defining stress control priorities; constructing a residual stress evolution model coupling the manufacturing stages and spatial partitions; adaptively matching pulsed electromagnetic field control parameters based on the prediction results of the residual stress evolution simulation model; and then implementing pulsed electromagnetic field loading on each spatial partition and performing feedback correction of the pulsed electromagnetic field control parameters. This invention can achieve precise control of residual stress in different regions of complex components without changing the overall structure of the component, improving dimensional stability and service reliability. It is applicable to the manufacturing process of complex components such as aerospace structural parts, thin-walled parts, and high-precision molds.

The application discloses a tibial plateau fracture locking bone plate system with a self-adaptive locking mechanism and transverse internal pressure, comprising a bone plate body, a self-adaptive locking bolt (ASB) and a passive-active hybrid driving module. The bone plate is provided with a transverse internal pressure groove; the ASB is integrated with double-lead threads, a check ratchet, a shape memory alloy gasket, a thin film strain gauge, NFC sensing and a piezoelectric micro motor; through body temperature triggering and external percutaneous coupling, automatic / semi-automatic adjustment of locking force is realized, quantitative intraoperative pressure, real-time postoperative monitoring, whole-process adaptive stress control are realized, the fracture end is maintained in an optimal healing window of 30-50 MPa, reduction loss, internal fixation failure and secondary surgery rate are significantly reduced, and the system is suitable for intelligent internal fixation of various tibial plateau fractures.

The application relates to the technical field of suspension bridges, in particular to a stress control type cable rotation anchorage system, which comprises a main cable saddle, a rotating cable saddle, a cable adjusting mechanism and an anchorage structure; the anchorage structure is provided with a cable rotation channel; the rotating cable saddles are symmetrically distributed on the two sides of the cable rotation channel, and the main cable saddle is arranged at the central axis of the top of the cable rotation channel; the cable adjusting mechanisms are symmetrically distributed on the two sides of the cable rotation channel, the cable sequentially passes through the cable adjusting mechanism, the rotating cable saddle and the main cable saddle on the top of the cable rotation channel on the same side, and then sequentially passes through the rotating cable saddle and the cable adjusting mechanism on the other side to complete rotation; the cable adjusting mechanism is fixedly arranged in the cable rotation channel, the cable adjusting mechanism comprises a clamping part and a height adjusting mechanism, the clamping part is used for fixing the cable, and the height adjusting mechanism is used for adjusting the arrangement height of the clamping part, so that the cable can enter or rotate out of the rotating cable saddle along the design height, and the linear smoothness of the cable entering the anchorage system or rotating out of the anchorage system is improved.

The application provides a double-control progressive stable loading method of a large compression and direct shear integrated tester, integrates strain control type and stress control type two test methods, and an automatic control system is switched according to a preset test scheme according to test requirements, can perform sustained stable loading, and the control mode in specific tests can be strain stress type comprehensive control, or strain type and stress type control respectively. The stress level borne by the sample is progressively changed, so that the stepwise change of the grading loading is avoided. The compression / direct shear conventional mechanical property test, long-term compression / direct shear rheological test can be performed, and the comprehensive test combining the mechanical property test and the long-term rheological test is realized.

This invention discloses an application method for a paper cutter blade force control system based on a mechanical model optimization, comprising the following steps: S1, the system establishes a mechanical model, which, after processing, can be fed back to the PLC control system in real time; S2, the system can adjust the cutting pressure of the blade in real time to adapt to different paper thicknesses, densities, and materials; S3, combining experimental data, a blade life prediction model based on fatigue theory and a finite element analysis model is used to predict the blade's service life, and the cutting process is automatically adjusted according to the actual stress conditions to maximize the blade's service life; S4, a two-factor experimental design method is used, taking different paper types as experimental variables and cross-analyzing them with multiple factors such as blade cutting pressure, paper feed speed, and cutting accuracy. According to this invention, it is ensured that the paper cutter can always accurately control the cutting force and blade pressure under different paper types and operating conditions, improving cutting accuracy and extending the blade's service life.

The application provides an independent decoupling motor simulation device, comprising: a power hardware module for generating electrical stress of a to-be-tested electric drive system; and an electrical stress control module connected with the power hardware module, for controlling the motor simulator and providing signals for the to-be-tested electric drive system. The control reference value of the motor simulation device is generated by using signals easily obtained by itself, a target motor model and a model of a port filter, and the AC voltage / current is reproduced at the AC test port through closed-loop / open-loop control, without the need of signal transmission or voltage sampling on the electric drive side. The application can realize decoupling with the to-be-tested electric drive converter, is independent of the voltage sampling accuracy of the to-be-tested electric drive converter port and the signal transmission of the electric drive system, and realizes plug-and-play of the motor simulation device.

Provided is a system for engineering geomechanical experimental testing of a reservoir rock mass, including a stress control unit, a temperature control unit and a rock sample holder. The stress control unit includes a rigid pressure-applying mechanism and a flexible pressure-applying mechanism. The rigid pressure-applying mechanism is configured to apply rigid pressure to a rock mass via an indenter and a pressing piece. The flexible pressure-applying mechanism is configured to apply flexible pressure to the rock mass by using a pressure medium. Rigid pressure application and flexible pressure application are integrated to simulate a stress status under an actual geological condition better, and uniformity of pressure application is also ensured. The temperature control unit is configured to control a temperature of the rock mass via a heating mechanism and a cooling mechanism. A method for engineering geomechanical experimental testing of a reservoir rock mass is further provided.

This invention discloses a lightweight backfill method and structure for underground structures based on additional stress control. This method uses lightweight foamed soil with controllable density as the backfill material, and precisely designs its density and replacement volume to ensure that the total additional stress generated by the backfill and the superstructure does not exceed the in-situ pre-consolidation pressure of the foundation soil, thereby fundamentally suppressing new settlement. This invention not only effectively controls settlement and ensures the safety of adjacent structures, but also leverages the vibration isolation effect of lightweight foamed soil and facilitates the resource utilization of engineering waste and industrial solid waste, demonstrating significant environmental and economic benefits.

This invention belongs to the field of aero-engine design technology, and provides an in-situ sampling simulation component for fatigue life of multiple critical locations under the same stress on an aero-engine rotor disk, along with its design method. The simulation component is cut in situ from the rotor disk component, centered on the fatigue-critical location. Stress control structures are fabricated in non-critical locations, including two radial stress gradient adjustment grooves and two thickness-direction principal stress gradient adjustment grooves. These are used to adjust the first principal stress gradient in the crack depth and length directions, respectively, to ensure consistency with the actual service condition of the rotor disk and to guarantee that the crack initiation location matches the failure mode. The fatigue-critical location retains its original material state without secondary processing. Loading structures are located on both sides of the loading section, supporting hole loading or clamping loading. This simulation component can be used for high-fidelity low-cycle fatigue testing, enabling accurate assessment of the fatigue life dispersion of multiple fatigue-critical locations with the same or similar peak stress levels on an aero-engine rotor disk.

The application relates to the technical field of fusion reaction devices, and discloses a divertor box body and a processing method thereof. The divertor box body comprises a main body and a cover plate. The main body has a first side for being connected with a plasma-facing structure. A cooling groove extending along the length direction of the main body is arranged in the main body, and the opening of the cooling groove is located on the outer wall of the non-first side of the main body. The cover plate is connected with the outer wall of the non-first side of the main body, covers the opening of the cooling groove, and forms a cooling channel together with the cooling groove. By arranging the opening of the cooling groove on the outer wall of the non-first side of the main body, the machining process of the first side is reduced, and error accumulation is avoided. When the cover plate is connected with the main body, the connection position of the main body and the cover plate is located in the area outside the first side. The stress generated during the connection of the main body and the cover plate and after the connection is controlled in the area outside the first side, so that the precision of the connection of the divertor box body and the plasma-facing structure meets the requirements.

This invention belongs to the field of non-explosive rock fracturing technology, and discloses a high-expansion stress-relieving composite inorganic rock-fracturing agent and its application method. The rock-fracturing agent consists of an expansion unit with a gradient coating structure and a ternary synergistic modifying component. The expansion unit uses highly active calcium oxide and moderately active magnesium oxide as core materials, and is coated with a phosphate-silica-based inner wall material and a silicate composite outer wall material to achieve graded dissolution and stress relief. The modifying component consists of rare earth oxides, silica fume, and titanate mineral phase modifiers to improve structural stability and stress control performance. The supporting application method achieves controllable advancement of the rock-fracturing process through lithology-adapted hole layout, batch grouting, and temperature-controlled curing. This method has the advantages of strong expansion force, controllable fracturing process, safety, and environmental protection, and is suitable for mining, tunnel excavation, and urban demolition scenarios.

The application provides a kind of based on digital twinning's slope anchoring system prestress long-term operation method and system, related to slope engineering monitoring technical field, wherein, the method comprises: the digital twin model including the creep law of rock-soil body and the relaxation law of anchor cable is established;Then strain data is mapped to virtual node, and contact stress is written into virtual base;Then the theoretical stress of future period is calculated based on the above-mentioned law and data;Then the geometric form and mechanical parameters of virtual geometric model are updated according to the difference value of theoretical stress and current stress;Finally, the unbalanced stress area is identified in the updated model, and stress control instructions are generated to adjust the support inclination and pre-tightening force.The application improves the accuracy and self-adaptive control ability of long-term operation of anchoring system prestress.

This invention relates to the field of coal seam permeability enhancement and pressure relief technology, and discloses a multi-dimensional loading visualization counter-rotating drilling permeability enhancement and pressure relief experimental system and method. The system includes a counter-rotating drilling experimental platform, a movement control component, a counter-rotating drilling drive component, a drill rod spacing adjustment component, an intelligent sensing component, a safety protection component, a coal sample holder, a stress control component, a mechanical response and pore fracture evolution monitoring component, and a data acquisition and control component. This invention can simulate a real in-situ geostress environment and, combined with a built-in grating fiber, an acoustic emission sensor array, and an external DIC visualization device, synchronously and in real-time capture the three-dimensional stress evolution characteristics inside the coal sample and the macroscopic fracture propagation law on the surface under drilling disturbance. This invention can characterize the pressure relief mechanism of counter-rotating drilling in multiple dimensions, providing accurate data and equipment support for parameter optimization of on-site coal seam gas extraction and pressure relief enhancement.

This invention provides a spring-driven radial compression-based pluggable GIS terminal and its assembly method, belonging to the technical field of conductive connection equipment. The terminal includes an epoxy sleeve, terminals, cable cores, stress control components, a stop sleeve, a cone support, a cone support pressure plate, a spring propulsion assembly, and a tail tube. The terminals are disposed within the epoxy sleeve, with one end connected to the GIS equipment via a tapered bevel, and the other end equipped with a watch strap contact finger. The cable core is plugged into the terminals. The stress control component is disposed within the epoxy sleeve and contains a stress cone. The stop sleeve contacts the stress control component. The cone support and the cone support pressure plate are connected via a tightening screw. The spring propulsion assembly includes several springs and guide rods, with the springs positioned between the cone support and the cone support pressure plate. This invention optimizes the electric field distribution, enhances contact stability, improves working efficiency, and reduces processing costs.

The application discloses a metal composite substrate stress balance regulation method, and relates to the technical field of substrate thermal control, and sequentially comprises the following steps: acquiring geometric topology parameters of a first side metal layer and a second side metal layer and generating an asymmetric polarization tensor; inputting the asymmetric polarization tensor into a thermal-mechanical dynamic coupling feedforward model, solving a target heat exchange difference threshold and generating a safety envelope line; in a thermal treatment cooling process, when the body temperature enters a preset phase change window, spatially different thermodynamic intervention boundaries are applied to both sides; during the application, a cliff phase-locked fuse protection mechanism is triggered according to the safety envelope line, the spatially different thermodynamic intervention boundaries are removed, and synchronous uniform cooling is restored. The method can realize feedforward cancellation of asymmetric thermal bending moments, reduce the warping and instability risks after annealing, and improve the process adaptability, manufacturing consistency and pre-stress control stability of the metal composite substrate, and the service reliability thereof.

This invention discloses a machine grasping method based on scene understanding and intelligent grasping. It generates a human grasping image from an input RGB image and user prompts using a basic generative model. The generated human grasping image is then transformed into specific robot actions. The robot, based on a grasping control network (GCN), controls its manipulator to perform grasping actions according to the target posture map and stress distribution map, and uses force sensors for real-time stress control. Visual and tactile sensors determine whether the manipulator's grasping is successful, and the weights of the GCN are adaptively adjusted based on the results, achieving adaptive learning and optimization of the model. This method, while completing the core grasping task, solves secondary problems such as strategy reliability, environmental adaptability, and grasping precision, and significantly reduces the deployment cost and cycle time for complex grasping tasks.