8results about How to "Avoid Fracture Failure" patented technology

The embodiment of the invention provides a quayside container crane transfer platform, an impact resistance verification method thereof and a readable storage medium, and relates to quayside container crane transfer platforms. The problem that a quay crane transfer platform based on static elastic design is insufficient in high-energy instantaneous impact resistance and light weight can be solved. According to the verification method, the platform structure enters a controllable plastic deformation stage through finite element calculation. When the total strain energy T is larger than or equal to the impact potential energy E, it is indicated that the structure converts impact kinetic energy into internal energy of materials through deformation modes such as reinforcing rib buckling and panel plastic upheaval, and effective dissipation of the energy is completed. And when the maximum strain value epsilon is smaller than or equal to the limit strain epsilon max of the material, it is ensured that the plastic deformation of the bearing component is always within the ductility capacity range of the material. Impact energy is actively dissipated through structural deformation, and the platform can be lighter and the cost can be reduced in combination with a manufacturing process.

The utility model relates to the technical field of composite metal plate, concretely relates to a kind of multi-flexibility layer metal wear-resistant lining, including substrate layer, the outside of substrate layer is sequentially provided with transition layer and wear-resistant layer according to from inside to outside, wear-resistant layer is alternately superimposed and is constituted by high-hardness layer and toughness buffer layer, the outermost layer of wear-resistant layer is high-hardness layer;High-hardness layer is high-chromium alloy or tungsten-based hard alloy;Toughness buffer layer is low alloy steel.The utility model designs wear-resistant layer as the structure of high-hardness layer and toughness buffer layer alternately superimposed, impact energy is absorbed using toughness buffer layer, crack formation is reduced under high impact working condition and crack propagation is effectively suppressed, and the wear resistance of multi-flexibility layer metal wear-resistant lining is significantly improved.

This utility model discloses a planar linear bearing, including a base, rollers, and an end cap. The base has a groove, and the rollers are disposed within the groove. The groove includes a first groove, a second groove, and a transition groove. The second groove is deeper than the first groove. The first and second grooves are smoothly connected via the transition groove to form a loop. An exposure window is provided on the first groove. The end cap covers the base, shielding the groove. The end cap includes a support portion and a connecting portion. The support portion is positioned corresponding to the first groove, and the connecting portion is positioned corresponding to the second groove. The connecting portion is higher than the support portion, and the connecting portion and the support portion are connected by a transition slope. The base also has a positioning component for positioning the end cap. Its structure is simple, increases bearing load, ensures structural strength, and possesses good toughness, thus improving structural performance.

The utility model discloses an integrated water bottle support structure improving bearing capacity relates to the field of automotive parts. The integrated water bottle support structure improving bearing capacity, including support main part, the top of support main part is connected with the support plate, the included angle place of support main part and support plate is fixedly connected with the support section bar, just the junction of support main part and support plate is embedded with first reinforcing rib and second reinforcing rib. The integrated water bottle support structure improving bearing capacity, through adding the support section bar at the included angle place of support main part and support plate, and embedding first reinforcing rib and second reinforcing rib at the junction, make the maximum Mises stress of support main part from 462.848MPa drop to 254.7MPa, lower than Q420 steel yield strength 420MPa, and the maximum stress of support section bar is 129.46MPa, lower than its yield strength 235MPa, effectively avoid the fracture failure.

The utility model relates to the technical field of anchoring and supporting, especially to an impact-resistant constant-pressure anchor rod structure, which comprises an anchor rod, an anchor head and a yielding assembly, the anchor rod is fixed to the bottom of a hole wall through the anchor head, the yielding assembly is installed at the outer end of the anchor rod, the anchor rod is a hollow rod, the middle hole serves as a grouting hole, the yielding assembly comprises a yielding inner core and an anchor rod screw connection, the front end of the yielding inner core abuts against a yielding sleeve, under the action of constant external force, the yielding inner core moves forward along the inner wall of the yielding sleeve, resists impact pressure, by setting constant parameters, the resistance that the yielding inner core receives when moving forward is constant, when the geology changes, the working resistance of the anchor rod remains constant, and the impact-resistant effect is realized.

This invention belongs to the field of refractory materials technology, specifically relating to a spinel-graphite-metal composite material for core nozzles. First, a high-porosity resin-carbon bonded spinel-graphite preform is obtained by cold isostatic pressing followed by heat treatment in a protective atmosphere. Then, metallic silicon particles are used to embed the resin-carbon bonded spinel-graphite preform, which is then heat-treated in a vacuum sintering furnace. As metallic silicon permeates into the high-porosity resin-carbon bonded spinel-graphite preform, it continuously reacts with the resin-carbon and graphite, forming a dense silicon carbide layer from the surface to the interior, followed by a dense metallic silicon bonded spinel-graphite layer. With the formation of the dense silicon carbide layer on the surface, the permeation reaction ends, leaving a porous spinel-graphite layer in the core of the material. This invention avoids excessive thermal stress causing severe thermal shock that could lead to core nozzle fracture and failure, further optimizing the thermal shock resistance of the core nozzle.

This invention discloses a method for preparing rolling mill rolls, belonging to the fields of rolling mill roll manufacturing and electroslag metallurgy. It employs a dual independent electroslag system, coupled with in-situ electrochemical activity monitoring-pulsed aluminothermic reduction, ultrasonic-electropulsion synergistic solidification, and rare earth slag closed-loop recycling technology. The prepared rolling mill roll includes a roll core and a rare earth modified working layer. This invention solves the problems of lack of dynamic control of rare earth elements, formation of brittle interfacial phases, random carbide precipitation, and waste of rare earth slag in existing technologies. The resulting rolling mill roll exhibits a cross-sectional hardness uniformity of ≤±0.5HRC, overall performance fluctuation of ≤±2%, and a service life more than twice that of traditional processes. It is suitable for preparing high-end rolling mill rolls for extreme working conditions such as aerospace special steel and ultra-high strength steel for new energy vehicles.

This invention discloses an adaptive buffer structure based on tungsten alloy and its preparation method, belonging to the field of buffer structure technology. It solves the technical problem that existing solutions using a single homogeneous material structure lack the deformation coupling energy absorption capacity of composite material structures. The structure includes a main frame and at least one buffer node connected to the main frame. Each buffer node comprises an energy-absorbing part and a supporting part, which are stacked. Through this stacked composite structure, the buffer node achieves graded energy absorption, significantly improving energy absorption efficiency compared to traditional single buffer structures and drastically reducing initial peak force, effectively coping with multi-load coupling conditions. It also possesses high rigidity, high toughness, and extremely rapid thermoelectric response characteristics, enabling adaptive stiffness adjustment according to changes in external loads, achieving a technological upgrade from passive load bearing to active protection.