19 results about "Fracture Problem" patented technology

The invention discloses a brittle material laser cutting thermal stress control method and system, and the method comprises the steps: obtaining real-time temperature distribution through infrared thermal imaging, combining finite element analysis and material characteristic dynamic data, constructing a thermal stress and fracture relation model, carrying out the iterative calculation of a thermal stress out-of-control threshold through a lambda algorithm, and determining a regulation boundary condition. According to the boundary condition, laser parameters are optimized, synchronous cooling airflow is introduced, the temperature gradient is dynamically controlled through an airflow pressure adjusting algorithm, historical data are processed through a convolutional neural network, the optimal laser parameter combination is predicted, in the cutting process, the microcrack diffusion state is monitored in real time, and auxiliary technological parameters are finely adjusted when necessary. The problem of fracture caused by out-of-control thermal stress in laser cutting of the brittle material is effectively solved, the cutting quality and efficiency are improved, and a new technical scheme is provided for precision machining of the brittle material.

The utility model discloses a tensile and anti-breaking electric appliance connecting line in the connecting line field, which comprises a line body, a connecting plug and a connector, one end of the line body is provided with a first fixing block, the other end of the line body is provided with a second fixing block, the connecting plug is connected with the first fixing block, the connector is connected with the second fixing block, and the connecting plug is connected with the second fixing block. The cable comprises a cable body, two ends of the cable body are respectively provided with a protective sleeve used for realizing tensile and anti-breaking functions, each protective sleeve comprises an outer protective layer and an inner protective layer, pressure-resistant plates are arranged between the outer protective layers and the inner protective layers, the pressure-resistant plates are arranged and distributed along the surfaces of the inner protective layers at equal intervals, and the pressure-resistant plates extend along the length directions of the inner protective layers; according to the tensile and anti-breaking electric appliance connecting wire, the protective sleeves with tensile and anti-breaking functions are arranged at the two ends of the wire body, so that the overall tensile strength of the connecting part between the wire body and the connecting plug and the connecting part between the wire body and the connector is remarkably improved, and the problem of breaking caused by pulling by external force is effectively prevented.

The application provides a fracturing reconstruction method and application for ultra-deep high-stress reservoirs, and mainly aims to solve the problems of high fracture pressure, small reconstruction volume and low fracture conductivity of high-stress reservoirs. Specifically, the application analyzes the fracturing problems of the current ultra-deep high-stress reservoirs, points out the limitations of the current technical measures, and proposes a new fracturing reconstruction technology for high-stress reservoirs. The technology takes the pre-composite pressure reduction process, forced fracture expansion process and fracture effective support process as the core, solves the problems of difficult fracturing, difficult fracture expansion and difficult support of high-stress reservoirs, and has good application effect.

The cylinder body structure comprises a cylinder body, lifting lugs are fixedly arranged at the two ends of the cylinder body respectively, and each lifting lug comprises a connecting part and two lifting parts integrally arranged at the two ends of the connecting part respectively; the connecting part is of an arc structure matched with the outer side face of the cylinder body, and the side face of the connecting part is integrally connected with the outer side face of the cylinder body. The two lifting parts are of L-shaped structures protruding out of the outer side face of the cylinder body. The lifting lug is of an integrated structure and is integrally connected with the cylinder body, so that the mechanical strength of the lifting lug can be improved, the connecting strength between the lifting lug and the cylinder body can be improved, the problem that the lifting lug is prone to breakage due to welding stress concentration is solved, the lifting lug is prevented from loosening, stable running of a vehicle is guaranteed, and driving is safer.

The application relates to a high-temperature alloy cross-piercing process interlayer defect prediction method and model, and particularly relates to a high-temperature alloy cross-piercing process interlayer defect prediction method and model, which comprises the following steps: establishing a high-temperature alloy cross-piercing finite element model, and performing high-temperature alloy cross-piercing finite element simulation; extracting all data of equivalent strain, temperature, strain rate, maximum shear strain, stress triaxiality, maximum shear stress, equivalent stress and maximum shear strain at the moment of deformation termination in the whole deformation process; calculating integral to determine damage value, average temperature and average strain rate; and performing high-temperature alloy compression-shear deformation experiments under the average temperature and average strain rate determined in the previous step. The application can predict engineering fracture problems in an actual deformation process through simple compression-shear hot simulation deformation experiments and finite element simulation technology, reduces the trial-and-error process in the actual production process, and saves manpower, material resources and financial resources.

The present application relates to material conveying equipment technical field, especially a kind of connecting sling and greenhouse lower hanging material trolley, comprising: track, the upper end of the track is provided with walking's stacker-reclaimer, the upper side of the left and right ends of the track is provided with connecting rod;Buffer component, rotationally connected in the outer end of connecting rod by fixed plate, the buffer component is used to buffer protection for connecting rod;Friction damping component, fixed at the end of buffer component away from fixed plate, the end of friction damping component away from buffer component is fixedly installed with fixed rod.When material trolley reciprocating operation generates high-frequency vibration, friction sliding occurs between friction ring piece and alloy steel sheet, vibration kinetic energy originally transmitted to net rack node is converted into heat energy and dissipated, stress amplitude at connecting node is greatly reduced, so that the initiation and expansion of fatigue crack at pinhole edge and weld are effectively inhibited, and the fracture problem caused by long-term reciprocating motion is solved.

The invention discloses a rapid optimization design method and device for inherent frequency, buckling pressure, maximum stress and other key indexes of an elastic strip, and belongs to the technical field of rail fasteners. Comprising the following steps: acquiring a plurality of key parameters of the elastic strip, including buckling end contact rigidity, tail end contact rigidity, buckling limb length, buckling end arc radius, tail end arc radius and side limb arch height; adjusting at least one key parameter based on the established quantitative relationship between the parameters and the inherent frequency, buckling pressure and maximum stress of the elastic strip; and calculating the adjusted key indexes, and optimizing the key indexes until a preset target is met. According to the method, the influence rule of key parameters on various performance indexes, namely collaborative optimization design of the missile strip, is defined, so that the inherent frequency of the missile strip can be remarkably improved to avoid a resonance area on the premise of keeping compatibility with an existing fastener system, meanwhile, the working stress is controlled below the fatigue limit, enough fastening force is ensured, and the service life of the missile strip is prolonged. And the resonance fatigue fracture problem of the elastic strip is fundamentally solved.

This invention belongs to the field of electrical equipment technology and discloses a method for calculating the dynamic response of dry bushings under seismic loading and establishing a core crack damage model. After simulating the vibration response of transformer bushings under seismic conditions, this invention can obtain various important data, including acceleration response, displacement response, actual stress, deformation degree, and stress concentration. This allows for the adjustment and optimization of various structural and material parameters. Through this simulation, the various physical effects in 110kV resin-impregnated paper dry bushings can be predicted, and the service life of the material in actual scenarios can be accurately determined. This invention establishes two fracture phase-field models to simulate crack propagation in thin plates under different loading conditions. By establishing a phase-field model for isotropic plate fracture problems, numerical calculations are performed using finite element analysis software to study the crack propagation process of thin plates with initial cracks under tensile and shear loads, and the influence of various parameters on crack propagation is calculated.

The invention relates to the technical field of aluminum oxide production equipment transformation, in particular to an aluminum oxide evaporation system evaporator condensate pipe transformation structure and method.The aluminum oxide evaporation system evaporator condensate pipe transformation structure comprises a condensate water pipeline arranged in an arc shape, and the condensate water pipeline is arranged between a heating chamber barrel and a separation chamber barrel; the circle center of the condensate water pipeline is located on the axis of the heating chamber barrel and the axis of the separation chamber barrel. One end of the condensate water pipeline is communicated with the heating chamber barrel through a first connecting pipe, and the other end of the condensate water pipeline penetrates through the side wall of the separation chamber barrel through a second connecting pipe and extends to the outside; through the design of the arc-shaped condensate water pipeline, the condensate water pipeline has a large span between the heating chamber barrel and the separation chamber barrel, the thermal expansion and cold contraction compensation capacity of the pipeline can be effectively improved, and the fracture problem caused by stress concentration is avoided.

The invention relates to the technical field of coal mining, and discloses a mining drilling and sampling device which comprises a moving vehicle, a pressurizing oil cylinder fixedly connected to the moving vehicle and a drilling rod arranged on the pressurizing oil cylinder, and further comprises a taking-out mechanism arranged on the pressurizing oil cylinder and comprising a loading table arranged on the surface of the pressurizing oil cylinder and a driving assembly. The driving assembly comprises a lifting oil cylinder fixedly connected to the interior of the loading table, the output end of the lifting oil cylinder is fixedly connected with a cylindrical carrier, the surface of the cylindrical carrier is fixedly connected with an air cylinder, and the synchronous assembly is arranged at the end of the air cylinder and used for breaking off the core column drilled by the drill rod in the working state. Through the arrangement of the synchronization assembly and the coordination assembly, the multiple arc-shaped extrusion blocks are driven to synchronously and centripetally contract along the guide block sliding rail, the extrusion blocks with the preset height difference are arranged in a stepped mode, the extrusion block at the highest position makes contact with a rock core column body firstly, precise shearing and extrusion breaking are achieved through local stress concentration, and the rock core column body is prevented from being damaged. And the problem of random fracture caused by traditional overall pulling is avoided.

The invention discloses an input shaft fracture fault diagnosis method and device for a hybrid power coupler, mainly relates to the technical field of input shaft fracture fault diagnosis, and aims to solve the problem that a current software strategy in an existing scheme almost has no logic for the problem of input shaft fracture, or corresponding diagnosis logic cannot be used for diagnosis of input shaft fracture. And after the vehicle is broken after sale, the fault reason cannot be judged in a short time, and personnel need to arrive at the site for analysis. Comprising an initial position interval of input shaft fracture; acquiring a current operation mode and preset detection data of the hybrid vehicle; according to the initial position interval and the current operation mode, matching a corresponding diagnosis condition set; and determining a specific fracture interval according to the establishment condition of the preset detection data in the corresponding diagnosis condition set.

The utility model relates to the technical field of resin sand casting, in particular to a reinforcing structure of a pouring gate pipe for resin sand casting, which comprises a reinforcing body and a plastic buckle. And the reinforcing bodies are tightly attached to the pouring gate pipe and are bound at equal intervals by utilizing a plurality of plastic buckles. A certain supporting force is provided for the pouring gate pipe, the deformation and fracture problems of the pouring gate pipe are effectively avoided, and the practicability is higher.

The present application belongs to the technical field of biomedical engineering materials, and specifically provides a kind of artificial bone material crack simulation method based on material point method.The core of the method is to discretize the local material area of artificial bone as a particle, and to calculate the spatial derivative and solve the momentum equation by combining the background grid.The crack propagation model of the material point method is established, and by using the common two-dimensional crack opening criterion, stress intensity factor criterion and maximum hoop stress criterion, it is determined whether the crack starts to expand and the crack propagation direction, and finally the traction law is introduced to simulate the crack surface contact problem between the upper and lower crack surfaces.The material point method not only avoids the grid distortion problems faced by the finite element method under large deformation and crack propagation, but also avoids the numerical fracture problems easily produced by the discrete element method under high-speed impact.

This invention relates to the field of implantable pressure sensors, and discloses an implantable pressure sensor with a flexible corrugated diaphragm and its manufacturing method, comprising: a corrugated diaphragm, a pressure-sensing diaphragm, and a supporting base; the corrugated diaphragm is disposed on the upper side of the pressure-sensing diaphragm; the pressure-sensing diaphragm is disposed on the upper side of the supporting base, and a pressure-sensing cavity is provided between the two; the corrugated diaphragm includes an integrally formed corrugated portion and a flat portion; the corrugated portion is the pressure-sensing portion, used to sense external pressure and transmit the pressure to the flat portion; the cross-sectional curve of the corrugated portion is a periodic curve; the flat portion is a joint portion, which is attached to the upper side of the pressure-sensing diaphragm and transmits pressure thereto. The implantable pressure sensor with a flexible corrugated diaphragm effectively alleviates the fatigue fracture problem caused by stress concentration by attaching a flexible corrugated diaphragm to the upper side of the pressure-sensing diaphragm. The special structure of the corrugated diaphragm enables a more uniform stress distribution, thereby extending the service life of the sensor.

The utility model relates to a draw bar heat preservation box, through the arrangement of a connecting assembly, the overall structural stability of the draw bar heat preservation box is enhanced, the risk that a connecting part is broken due to frequent use of a draw bar is reduced, and therefore the durability of a product is remarkably improved, and the service life of the product is remarkably prolonged. Specifically, stable connection of the pull rod in the using process is ensured by adopting a connecting assembly composed of a fixing cylinder, a connecting shaft and a positioning block, so that acting force can act on the box body with a larger contact area, the connecting strength of the pull rod and the box body is greatly improved, and the problem of connection looseness or breakage is avoided. The support in the pulling assembly can flexibly rotate in the connecting groove, the support can be attached to the box body when the box body is not used, space is saved, the support can be rapidly locked through the limiting piece when the box body is used, and stability in the pulling process is ensured.

The invention discloses a fan foundation reinforcing structure, and relates to the field of fan foundations. The draught fan foundation reinforcing structure comprises an anchor bolt cage, a shock absorber, self-resetting assemblies and a bearing platform, and the elastic ends of all the self-resetting assemblies are fixedly connected with the anchor bolt cage. Lateral energy consumption is carried out through the shock absorbers arranged in groups so as to reduce the adverse response of wind loads on the bottom of the fan foundation, kinetic energy of the bottom of the fan foundation is transmitted to the anchor bolt cage and then transmitted to the self-resetting assembly through the anchor bolt cage, elastic restoring force distributed annularly is provided through the self-resetting assembly, the stress amplitude is reduced, and the energy consumption of the fan foundation is reduced. Strong wind impact energy is absorbed through the shock absorber, residual kinetic energy is restrained through the self-resetting assembly, and structural displacement is reduced. The problems of crushing and breakage caused by insufficient rigidity and node stress concentration of an anchor cable system are solved, a rigid core is formed through the anchor bolt cage and the bearing platform, and the anchor bolt cage, the shock absorber and the self-resetting assembly cooperate with one another, so that the overall reinforced structure obtains the high-rigidity deformation resistance and high-toughness energy absorption performance.

The utility model discloses a double-locking-point cylindrical roller bearing retainer, which solves the problem that a window beam of the retainer is easy to generate fatigue fracture under the condition of high speed or high load, and comprises two end rings and window beams which are connected with the two end rings and are circumferentially and uniformly distributed, and pockets for mounting cylindrical rollers are formed between the adjacent window beams. First locking point elements are arranged on the inner walls of the upper sides of the pockets, opposite second locking point elements are arranged on the inner walls of the lower sides of the pockets, and the first locking point elements and the second locking point elements are arranged on the inner walls of the upper sides and the inner walls of the lower sides of the pockets correspondingly and matched with first matching grooves and second matching grooves in the cylindrical rollers, so that accurate positioning and restraining of the cylindrical rollers are achieved; according to the cage, collision between the rollers and the window beam in the operation process is reduced, so that stress concentration caused by collision is avoided, the fatigue life of the cage is prolonged, and due to the fact that the strength of the cage does not need to be enhanced by thickening the window beam, light weight of the cage is achieved through the design.

The invention belongs to the field of copper alloys, and discloses a high-strength, high-conductivity and high-plasticity CuCoNiSi series alloy of which the conductivity is not lower than 50% IACS, the tensile strength is not lower than 700 MPa, and the product of strength and ductility is not lower than 9.00 GPa.%. The invention also discloses a preparation method and application of the alloy, and the preparation method comprises the following steps: firstly preparing a CuCoNiSi alloy ingot, and then sequentially carrying out homogenization treatment, hot rolling treatment, solution treatment, first cold rolling treatment, first aging treatment, second cold rolling treatment, second aging treatment, third cold rolling treatment and third aging treatment. And the CuCoNiSi series alloy is obtained. Through cooperative control of microalloying component design and a multi-stage deformation-graded aging process, a stable multi-scale precipitation structure is constructed in the Cu-Ni-Co-Si alloy, so that a nano-scale precipitation phase, a micron-scale precipitation phase and a deformation substructure have a synergistic effect, the strength and the electric conductivity are improved, and meanwhile, the mechanical property of the Cu-Ni-Co-Si alloy is improved. And the problems of strain localization and early-stage fracture are effectively relieved, so that synergism and unification of high strength, high conductivity and high plasticity are realized.

The invention provides a space and step size synchronous self-adaptive meshless brittle fracture phase field simulation method, and relates to the technical field of damage and fracture mechanics. According to the method, a damage driving SA method is adopted as a node self-adaptive strategy, a brittle fracture phase field model is subjected to dynamic discrete solution, and an improved DA method is embedded into displacement circulation; and synchronous dynamic adjustment of the space node and the displacement step length is realized. In addition, a combination form of a linear polynomial basis and a multi-harmonic spline radial basis function is adopted to approximate displacement field and phase field variables, the problem of parameter sensitivity of an RPIM meshless technology is relieved, and numerical value implementation is simplified. The method can accurately capture the evolution process of the crack, has the characteristics of high calculation precision, high efficiency, simplicity and convenience in implementation and the like, can effectively simulate two-dimensional and three-dimensional complex crack propagation behaviors, and provides a reliable analysis tool for the engineering fracture problem.