115 results about "Plastic energy" patented technology

In one embodiment, an energy absorber, comprises: a plurality of crush lobes including a base and sides extending from the base to an outer wall; and a composite insert in the energy absorber. The insert comprises a second plastic material and reinforcement. The second plastic material is different than the crush lobe material. The insert is located at an area of the crush lobes, and wherein the area is the side and/or the outer wall. In another embodiment, an energy absorber comprises: a plastic frame; thermoplastic crush lobes extending from the frame, wherein the crush lobes comprise an outer wall, an extending wall, and a base; and a plastic insert located at an area having a volume of the crush lobes, wherein the insert occupies less than or equal to 90% of the area volume. The insert comprises reinforcement and a plastic material different than the thermoplastic crush lobes.

An energy-absorbing system includes a tube made of a continuous polymeric material. The tube has first and second tube sections connected by an intermediate tube section. By this arrangement, upon the bumper system receiving a longitudinal impact, the first and second tube sections telescopingly collapse with a predictable and consistent rolling collapse.

The invention provides an adjustable coupling beam joint seismic energy dissipating device and a seismic coupling beam joint. The energy dissipating device comprises acorbel bracket and an energy dissipating piece. The corbel bracket is used for being matched with and installed on a steel column of the coupling beam joint. The corbel bracket comprises a plurality of inserting slots which are parallel to the steel column and formed at intervals. The energy dissipating part comprises a plurality of energy dissipating plates arranged side by side at intervalsand atop plate arranged at the top ends of the energy dissipating plates. The energy dissipating plates are correspondingly arranged in the inserting slots in a clamped mode. The lower part of each energy dissipating plate is inserted into the corresponding inserting slot. Each energy dissipating plate is provided with an enlarged energy dissipating part which is exposed to the exterior of the corresponding inserting slot. The top plate isused for being matched with and installed on the lower portion of a steel beam of the coupling beam joint. The time point of entering into a plastic energy dissipating state of the enlarged energy dissipating part is controlled by adjusting the slot width of the inserting slots. The adjustable coupling beam joint seismic energy dissipating device solves the problems that the energy dissipating performance of an existing seismic energy dissipating device is general, and repairing after the earthquake is difficult, and the performance and disassembly work of the energy dissipating device are further improved.

The invention provides a constant-resistance large deformation anchor cable control method for soft rock tunnel surrounding rock large deformation disaster. Guniting sealing is carried out on a fracture surface timely after tunneling, contact time of surrounding rock and air is shortened, a steel bar net is rapidly laid and a constant-resistance large deformation anchor cable is installed, and thesurrounding rock is reinforced through high prestress of the anchor cable. Huge plasticity energy in the surrounding rock can be released in a large deformation mode, firstly, the huge plasticity energy acts the constant-resistance large deformation anchor cable, after the surrounding rock plasticity energy is released, energy acting on a supporting body can reduce gradually, at the moment, the constant-resistance large deformation anchor cable supporting body can be located in a constant-resistance coupling supporting state, steel arch supporting is combined, the supporting effect of ''couple hardness with softness'' is formed, the stability of tunnel surrounding rock is guaranteed, and the soft rock tunnel surrounding rock large deformation disaster is avoided.

The invention provides a phenolic modified polyurethane polyisocyanurate PIR energy-saving insulation board. The phenolic modified PIR energy-saving insulation board is of PIR battenboard structure or PIR bare board structure. A middle sandwich layer of the PIR battenboard structure is of phenolic modified PIR macromolecule structure. Both upper and lower panels of the middle sandwich layer are provided with metal or nonmetal sheets. The phenolic modified PIR energy-saving insulation board has the advantages that compared with a polyurethane modified hard polyisocyanurate PIR foam plastic energy-saving insulation board, the fireproof and high temperature resistance performances are improved; and compared with a phenolic resin foaming insulating material, the phenolic modified PIR energy-saving insulation board has excellent environmental-friendly performance, physical property and better thermal insulation performance.

Disclosed is a seismic resistance, heat preservation and sound insulation integrated wall. According to the integrated wall, seismic resistance energy dissipation, heat preservation and sound insulation functions are integrated together; lateral resistance stiffness is provided for the structure, plastic energy dissipation is conducted, the additional damping ratio is provided, the response of the structure under an earthquake is reduced, the architecture function is also combined, and the heat preservation and sound insulation requirements of a wall body are met. Factory prefabricating and on-site assembly standardizing of the integrated wall are achieved, the delivery period is shortened, and the production efficiency is improved. The seismic resistance, heat preservation and sound insulation integrated wall comprises a seismic resistance energy dissipation element located at the center, out-of-surface restraining keels and external heat preservation and sound insulation structures. Upper and lower connecting pieces of a buckling-free corrugated steel plate energy dissipation wall body are used for connecting the buckling-free corrugated steel plate energy dissipation wall body with upper and lower frame beams through high-strength bolts, and thus the wall body structural functions of the buckling-free corrugated steel plate energy dissipation wall body are achieved. Meanwhile, according to the single wave number of the corrugated steel plate wall body, the multiple out-of-surface retraining keels with the shapes being matched with the shapes of wave crests or wave troughs are arranged outside the surface of corrugated steel plate wall body. The external heat preservation and sound insulation structures are fixed to the keels, and the transverse ends of the external heat preservation and sound insulation structures are fixed to edge members on the left and right sides of the buckling-free corrugated steel plate energy dissipation wall body through the keels.

The invention discloses a bearing and energy-dissipation difunctional corrugated steel plate wall. The bearing and energy-dissipation difunctional corrugated steel plate wall comprises a buckling-freecorrugated steel plate energy-dissipation wall located in the center and square steel pipe concrete column members located at the two sides, the buckling-free corrugated steel plate energy-dissipation wall is welded to the square steel pipe concrete column members at the left side and the right side, the upper ends and the lower ends of the square steel pipe concrete column members are welded tobase plates respectively, and the base plates are fixed to frame beams. The bearing and energy-dissipation difunctional corrugated steel plate wall is connected with a main body structure through bolts, the convenience and assembly degree of on-spot installation are improved, and the on-spot welding workload is reduced. The bearing and energy-dissipation difunctional corrugated steel plate wall integrates load bearing and earthquake-resistance energy dissipation, and the shear capacity and the stability of the structure can be improved; when the bearing and energy-dissipation difunctional corrugated steel plate wall is subjected to plastic energy dissipation, an additional damping ratio is provided, the response under a structure earthquake is reduced, the weight can also be borne, part ofupper vertical loads borne by the columns are shared, and the purpose that the wall has two functions is achieved.

The invention relates to a plastic seal pressing-in material for eliminating blast furnace gas blowby, which is characterized by being formed by combining plastic seal pressing-in material, long-term plastic sealant and high-strength fast hardening self-flow castable. The plastic seal pressing-in material can be pressed in larger furnace gaps at different blast furnace gas blowby positions, and the material can keep certain plasticity at low temperature, effectively fill in the gaps to play a role in plugging a gas blowby channel, and automatically harden and keep the volume stable and unshrinking; a furnace foundation part is manufactured into a labyrinth seal structure, and a gas exposed channel is plugged by using the long-term plastic sealant; the high-strength fast hardening self-flow castable is cast outside a long-term plastic seal material to level so that a seal solidifying role is played; and the three materials are combined for application so that multi-plugging for the gasblowby channel is formed, the gas blowby channel is effectively plugged, a new blowby channel is not easy to form, and therefore, the aim of fundamentally solving the problem of the blast furnace gasblowby is achieved.

The invention discloses an earthquake damage assessment method for a short-leg shear wall structure. A computing model is built by adopting finite element software, wherein a wall body and floor slabs adopt shell units; coupling beams and secondary beams adopt beam units; steel bars are defined as layers to be embedded in members; and an autooscillation circular frequency of the structure is calculated. Damage distribution of the short-leg shear wall structure under translational resonance excitation is calculated by adopting a concrete plastic damage constitutive model; a state of damage of cross sections of all wall legs is obtained by continuously adding excitation amplitude; a basic destruction form is obtained; and at the moment, corresponding plastic energy consumption is limited plastic energy consumption of the structure. An earthquake wave is subjected to wavelet packet decomposition to form sub-waves taking the autooscillation frequency of the structure as a center; and plastic energy consumption demands of the sub-waves are calculated. Structure safety is judged; a safe structure is judged; and an overall damage index of the structure is calculated; and a damage level is judged. The method has the beneficial effect that the overall damage level of the short-leg shear wall structure under the action of an earthquake can be accurately and reliably estimated or assessed.

The invention provides a double-aluminum-alloy-plate assembly type buckling restrained brace. Core plates are fixed to the two sides of a steel i-beam through bolts by using upper channel steel, lowerchannel steel and middle channel steel; large overall bending rigidity of the brace can be provided, the requirement for the constraint ratio is easily met, the brace can quickly enter the plastic energy dissipation state when bearing a reciprocating load, and earthquake energy can be dissipated to a larger extent; the core plates are made of aluminum alloy so that the dead weight of the structure can be reduced to a certain extent. The structure is in an assembly type and is convenient to detach, damaged parts can be conveniently replaced after earthquakes, and economic benefits and the social benefits are outstanding.

The invention provides an aluminum-coated plastic energy-saving fire-resistant window. Square steel is fixedly installed in a PVC section chamber. A structural aluminum section is fixed on a PVC section and the square steel. The internal of the PVC section chamber and the external surface of the PVC section are bonded with refractory materials. After the assembly of the PVC section and the structural aluminum section is completed, an L-shaped glass support plate is installed on the PVC section, a lap of refractory materials is pasted in the same position of the PVC section, with the refractory materials covering the L-shaped glass support plate, then glass is put in, and a T-shaped protection component is installed. The invention also provides the fire protection method of the aluminum-coated plastic energy-saving fire-resistant window. The aluminum-coated plastic energy-saving fire-resistant window is tested according to the GB/T12513-2006 standard, and the time of fire-resistant integrity obtained is 60 min. Both the PVC section chamber and the surface of the PVC section are bonded with the refractory materials which can expand at high temperature to fully support softened PVC. The four corners of a window frame are connected by metal screw connectors, breaking the welding barrier of plastic steel window corners.

The invention provides room-temperature high-plasticity wrought magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following components by weight percent: 5.5wt%-7.3wt% of Al, 0.40wt%-1.50wt% of Zn, 0.15wt%-0.50wt% of Mn, 0.05wt%-1.0wt% of P and the balance being Mg and inevitable impurities, wherein the inevitable impurities comprise the following components: not more than 0.05wt% of Si, not more than 0.004wt% of Fe, not more than 0.004wt% of Cu and not more than 0.002wt% of Ni. According to the magnesium alloy, a nonmetal element P is added in an existing magnesium alloy smelting process, a stable small grain structure is obtained under the action of the nonmetal element P, the room-temperature plasticity is improved, and the room-temperature processing and using requirements of finished products or semi-finished products can be met.

The invention relates to a buckling restrained brace. The buckling restrained brace comprises end part restrained sections, buckling sections and a sleeving pipe, the end part restrained sections arelocated atthe two ends of the buckling sections and play a load conveying role, one sides of the end part restrained sections are connected with the buckling sections, and the other sides of the end part restrained sections are used for connecting to a beamcomponent, a column component or a joint; the sleeving pipe is fixed to the outer sides of the buckling sections by grouting and filling concrete, and a layer of an unbonded material is between the concrete and the outer sides of the buckling sections; and buckling sections play a role of dissipating energy and the material of the buckling sections is alloy steel, the micro organization structure of the alloy steel is composed of a meta-stable stateaustenite and thermal-inducedepsilon martensite with the volume fraction less than 10%, and entering into a yield phase, and the micro organiztion of the alloy steel is subjected to reversible transition between the austenite and stress/strain-induced epsilon martensite under theactionof stretch-compression alternate loading. The buckling restrained brace can possess larger buckling bearing force and accumulated plastic energy dissipating effect, and can significantly improve the anti-seismic property of a building and realize light weight of the buckling restrained brace.

The invention provides a Zr-Sn-Nb-Hf alloy bar. The Zr-Sn-Nb-Hf alloy bar comprises the following components in percentage by mass: 0.8%-1.2% of Sn, 0.2%-0.4% of Nb, 0.8%-1.6% of Hf and the balance of Zr and inevitable impurities. The invention further provides a method for manufacturing the Zr-Sn-Nb-Hf alloy bar. The method comprises the following steps: 1, a Sn-Nb-Hf intermediate alloy is manufactured through vacuum non-consumable arc melting; 2, the Sn-Nb-Hf intermediate alloy is broken and is uniformly mixed with sponge Zr, and then the mixture is compacted into an electrode; 3, an ingot casting is obtained through vacuum consumable arc melting; 4, a semi-product bar blank is obtained through hot extrusion; and 5, the Zr-Sn-Nb-Hf alloy bar is obtained through hot extrusion. The Zr-Sn-Nb-Hf alloy bar has excellent room-temperature and high-temperature strength and good plasticity, and can be used as a structure material under a next-generation high-burnup condition.

An energy-absorbing system includes a tube made of a continuous polymeric material.The tube has first and second tube sections connected by an intermediate tubesection. By this arrangement, upon the bumper system receiving a longitudinalimpact, the first and second tube sections telescopingly collapse with a predictableand consistent rolling collapse.

The invention relates to a wire rod for a pipeline steel gas shield welding wire and a manufacturing method of the wire rod, the wire rod comprises the following elemental components in percentage by mass: 0.06-0.09% of C, 0.55-0.80% of Si, 1.45-1.60% of Mn, 0.008-0.015% of S, 0.85-0.95% of Ni, 0.060-0.085% of Ti, 30-70ppm of O and the balance of Fe and inevitable impurity elements, and the impurity elements comprise less than or equal to 0.003% of P, less than or equal to 0.002% of Sb, less than or equal to 0.002% of Sn and less than or equal to 0.003% of As. The microstructure of the wire rod is ferrite and pearlite, TiO2 inclusions distributed in a dispersed mode exist in the microstructure, the size of the TiO2 inclusions is stably smaller than 5 micrometers, and the number of the inclusions in unit area is stably larger than 35/mm < 2 >. The tensile strength of the wire rod is stable to be smaller than or equal to 700 MPa, the area reduction is larger than or equal to 65%, good plasticity is achieved, and direct drawing operation with the area reduction rate reaching 95% or above can be carried out. The manufacturing method comprises the steps of molten iron pretreatment, molten steel primary smelting, LF refining, square billet continuous casting, square billet heating and rolling and wire rod cooling.

The invention belongs to the field of heterogeneous materials, and particularly relates to a high-strength and high-plasticity layered heterogeneous magnesium-lithium composite material and a preparation method thereof. The preparation method comprises the following steps: (1) pretreating single-phase magnesium-lithium alloy plates and double-phase magnesium-lithium alloy plates which are greatly different in strength and plasticity, and stacking the single-phase magnesium-lithium alloy plate and the double-phase magnesium-lithium alloy plate according to a high-strength and low-plasticity/low-strength and high-plasticity/high-strength and low-plasticity mode; (2) after the stacked plates are subjected to high-temperature heat preservation, conducting rolling; and (3) after the plates obtained in the step (2) are subjected to surface treatment, the step (2) is repeated. Magnesium-lithium alloys greatly different in strength and plasticity are tightly combined together through accumulative rolling, a layered heterogeneous structure is formed at the same time, the strengthening effect induced by heterogeneous deformation can be generated due to the strength and plasticity differences existing between different areas during deformation, and therefore the strength and plasticity of the material are improved at the same time.

The invention discloses a drilling parameter optimization method based on a plastic energy dissipation ratio. The method comprises the following steps that: S1: according to the mechanical models of plastic fracture and brittle fracture in a well drilling rock cutting process, independently establishing a mechanical specific work calculation model under the situations of the plastic fracture and the brittle fracture of rock; S2: utilizing the mechanical specific work calculation model under the situations of the plastic fracture and the brittle fracture of the rock, carrying out combination toobtain a mechanical specific work final calculation model; S3: on the basis of the mechanical specific work final calculation model, establishing a plastic energy dissipation ratio calculation model;S4: through a cutting test, obtaining parameters in the plastic energy dissipation ratio calculation model; S5: solving the plastic energy dissipation ratios under different cutting depths by the plastic energy dissipation ratio calculation model; and S6: comparing the plastic energy dissipation ratios under different cutting parameters, optimizing the optimal cutting parameter. By use of the method, the optimal cutting parameter can be optimized, and therefore, purposes that drilling efficiency is improved and well drilling cost is lowered are finally achieved.

The invention discloses a composite type energy absorbing device with a thin-wall metal tube filled based on a cut honeycomb structure. The problems that an energy absorbing device is single in energyabsorbing manner, and overrange impact load protection cannot be achieved can be solved. The device is composed of a wedge-shaped diameter expansion block with a parallel blade set, the thin-wall metal tube, the honeycomb structure and an air leakage protection chassis, an inner cavity of the thin-wall metal tube is coaxially filled with the honeycomb structure, the wedge-shaped diameter expanding block is coaxially and tangently placed on an upper port of the thin-wall metal tube, the air leakage protection chassis is coaxially welded to a lower port of the thin-wall metal tube, an air leakage groove of the chassis coincides with a blade face of the wedge-shaped diameter expanding block, when the wedge-shaped diameter expanding block bears conventional impact loads, the parallel blade set generates cutting energy absorbing on the honeycomb structure, the metal tube generates diameter expanding plastic energy absorbing, when the wedge-shaped diameter expanding block bears the overrange impact load, the honeycomb structure generates buckling plastic energy absorption, low-acceleration response and the overrange impact load protection of a vehicle during conventional collision can be achieved, the energy absorbing effect is good, and key parts can be repeatedly used.

The invention provides a multi-stage landing buffer energy absorbing device. The multi-stage landing buffer energy absorbing device comprises three stages of energy absorbing mechanisms. The first stage of energy absorbing mechanism comprises a first outer shell and an elastic energy absorbing unit arranged in an inner cavity of the first outer shell. The second stage of energy absorbing mechanismis an elastic daub buffer. The second stage of energy absorbing mechanism comprises a first end and a second end, wherein the first end and the second end are oppositely distributed, and the first end is limited in the first outer shell and abuts against the elastic energy absorbing unit. The third stage of energy absorbing mechanism comprises a second outer shell and a plastic energy absorbing unit arranged in an inner cavity of the second outer shell, and the second end is limited in the second outer shell and abuts against the plastic energy absorbing unit. Buffer energy absorption of a conventional working condition is provided through the first stage of energy absorbing mechanism, buffer energy absorption of an unconventional non-emergency working condition is provided through the second stage of energy absorbing mechanism, buffer energy absorption of an unconventional emergency working condition is provided through the third stage of energy absorbing mechanism, and therefore thetechnical problems that a landing buffer energy absorbing device hardly meets the requirements of carrier rockets, airplanes and other aircrafts for dealing with complex landing working conditions are effectively solved.