288 results about "Impact energy absorption" patented technology

Light metal/CFRP-made structural members which are characterized in that they are structural materials in which a CFRP material is stuck to the surface of a light metal material via an adhesive agent layer of thickness at least 10 mum and up to 500 mum, and the volume resistivity of the adhesive agent layer between said metal material and said CFRP material is at least 1x1013 OMEGA.cm and, furthermore, the adhesive strength at room temperature is at least 15 MPa. In accordance with the present invention, since conventional light metal/CFRP structural materials can be made lighter and, furthermore, since the resistance to galvanic corrosion is outstanding and it is possible to markedly enhance the strength and the impact energy absorption performance, the development of applications and large-scale expansion into new fields becomes possible. Weight reduction and enhancing the durability and reliability of structures also makes a considerable contribution in terms of environmental protection.

PCT No. PCT/JP97/04596 Sec. 371 Date Nov. 12, 1998 Sec. 102(e) Date Nov. 12, 1998 PCT Filed Dec. 12, 1997 PCT Pub. No. WO98/26195 PCT Pub. Date Jun. 18, 1998A resin impact absorber comprising a hollow columnar body having a honeycomb section or a hollow columnar body having a cylindrical shape, the hollow columnar body being made of a resin with a flexural modulus of 500 to 5000 kgf/cm2, wherein a reaction-compressibility curve at the time of compression in the lengthwise direction of the columnar body satisfies the following conditions: (a) yield strength>/=100 Tf/m2 and (b) compression energy absorption>/=50 Tf.m/m3. The resin impact absorber of the present invention is small in size and light in weight and exhibits a high impact energy absorption capacity. A site or structure with an impact absorber of the present invention disposed therein can be prevented from remarkable damage or breakage when it receives a high impact force.

A method includes steps of providing round tubing, providing a compression box and wedging dies, and reshaping the round tubing into a single or double-tapered rectangular tube including using the compression box to control an outside shape, while using the wedging dies to force material of the tubing outwardly toward the compression box. This arrangement minimizes material thinning. A tubular crushable structure is produced that is designed for longitudinal impact-energy-absorbing capability. The crushable structure includes a single or double-tapered rectangular tube made of material having a tensile strength of at least 40 KSI. In a narrower form the tensile strength is at least 80 KSI, though it can be 100 KSI or higher.

Of side wall portions (60a, 60b) of a tubular body portion (52) mainly constituting an impact absorbing member (50), a wider side wall portion (60a) on the vehicle inner side is provided with a projecting rib (70) projects outward in the direction perpendicular to the axis of the body portion. The projecting rib (70) extends from an axial end (52a) adjacent to a mounting plate (54) and parallel to the axial direction of the body portion. Therefore, even when an impact load is applied to the impact absorbing member (50) in an oblique direction with respect to the vehicle to generate a moment load, the existence of the projecting rib (70) prevents the impact absorbing member from falling down laterally. Accordingly, excellent impact-absorbing properties are stably obtained. The projecting rib (70) is formed not to reach the load input side, i.e., the axial end (52b) adjacent to a mounting plate (56), where collapse starts. Therefore, no load increase occurs in a crash initial stage to well maintain impact-energy-absorbing properties.

The invention discloses a front longitudinal beam structure for automobiles, in particular discloses a novel front longitudinal beam structure adaptive to impacting energy absorption of automobiles. In the invention, the front longitudinal beam structure is divided into four segments as follows: the first segment is a front longitudinal beam foremost segment which is subjected to deformation firstly on the front longitudinal beam during impacting, a second segment is an indeformable segment, a third segment is a strength-variable segment and can be subjected to deformation during impacting, and the fourth segment is an indeformable segment in which a destructible filling material is filled. Compared with the traditional front longitudinal beam structure, by adopting the front longitudinal beam structure in the invention, the energy absorption capability of the front longitudinal beam can be improved, the automobile body invasion amount can be reduced, the acceleration of front impact of an automobile can be reduced, and the safety of the front impact of the automobile can be improved effectively.

There is provided an impact protection structure for providing impact energy absorption at a region substantially between a first transverse strengthening member and a second substantially upright strengthening member of a road vehicle. In operation, the first and second members are disposed substantially mutually perpendicularly. The impact protection structure comprises an energy absorbing block arrangement and a cover arrangement for maintaining the absorbing block arrangement substantially in position during impact. In operation, the impact protection structure is susceptible to reducing lateral damage to the road vehicle in crash or impact situations, thereby potentially increasing passenger and driver safety.

The lightweight bulletproof metal matrix macrocomposites (MMMC) contain (a) 10-99 vol. % of permeable skeleton structure of titanium, titanium aluminide, Ti-based alloys, and/or mixtures thereof infiltrated with low-melting metal selected from Al, Mg, or their alloys, and (b) 1-90 vol. % of ceramic and/or metal inserts positioned within said skeleton, whereby a normal projection area of each of said inserts is equal to or larger than the cross-section area of a bullet or a projectile body. The MMMC are manufactured as flat or solid-shaped, double-layer, or multi-layer articles containing the same inserts or different inserts in each layer, whereby insert projections of each layer cover spaces between inserts of the underlying layer. The infiltrated metal contains 1-70 wt. % of Al and Mg in the balance, optionally, alloyed with Ti, Si, Zr, Nb, V, as well as with 0-3 wt. % of TiB2, SiC, or Si3N4 sub-micron powders, to promote infiltrating and wetting by Al-containing alloys. The manufacture includes (a) forming the permeable metal powder and inserts into the skeleton-structured preform by positioning inserts in the powder followed by loose sintering in vacuum to provide the average porosity of 20-70%, (b) heating and infiltrating the porous preform with molten infiltrating metal for 10-40 min at 450-750° C., (c) hot isostatic pressing of the infiltrated composite, and (d) re-sintering or diffusion annealing. The positioning of the ceramic inserts in Ti-based powder is carried out by using a metal grid aiding the placement of inserts in a predetermined geometric pattern, and said grid becomes the integral part of the macrocomposite material. The technology is suitable for the manufacture of flat or shaped metal matrix macrocomposites having improved ductility and impact energy absorption such as lightweight bulletproof plates and sheets for airplane, helicopter, and automotive applications.

The protective helmet includes a rigid outer shell where the shell includes an undulating cross-sectional profile. A layer of impact-energy-absorbing material is positioned adjacent to the shell. The undulating profile of the shell can be any type of load spreading undulating profile, such as that of a sinusoidal or triangular wave configuration. The undulating load-spreading profile can be on the inner surface of the shell, on the outer surface of the shell or the entire cross-section of the shell may be undulating. The unique undulating profile makes the shell more rigid and spreads the impact load across the surface of the shell to thereby spread the deformation of the padding layer to prevent the shell from bottoming out of the impact-energy-absorbing material during an impact. As a result, a safer and more effective protective helmet is provided.

A tunable and reusable impact energy absorbing system and process includes a control structure comprising a sleeve having an outer surface fixedly attached to a chassis, a seal at each end of the sleeve, a magnetorheological fluid disposed between the seals, and a coil in proximity to the magnetorheological fluid, wherein the seal and the magnetorheological fluid are in sliding engagement with a support member, wherein the impact surface is fixedly attached to a support member. Varying the current to the coil alters the magnetic field upon the magnetorheological fluid, which can be used to tune the yield stress of the sliding engagement.

A filling structure 10 is a structure in which a filling material 12 having a higher impact energy absorbing performance is inserted into the inner part of a hollow member 11, and the filling material 12 so inserted is fixed to the hollow member 11 with an adhesive layer 13 resulting when the filling material 12 is heated to expand and is cooled to set thereafter.

A vehicle shock absorber includes a housing, and a shock-absorbing member. The housing has at least one hollow formed therein, is formed of a rigid material, and is fixed to a bone structural member of vehicles. The shock-energy absorbing member is disposed in the hollow of the housing at least, and is formed of a super plastic polymer material. The super plastic polymer material exhibits a tensile breaking elongation of 200% or more, a yield strength of 20 MPa or more with respect to a predetermined strain, and a tensile elastic modulus of 400 MPa or more.

The invention discloses a method for machining high-strength steel hot stamping formed parts. The main principle of the machining method is that partial tempering or annealing processing is carried out on the hot stamping formed parts with the uniform performance, gradient changes of the tempering or annealing temperature are achieved through heat conduction of a board, gradient changes of the performance are achieved, and the partial trimming and hole punching performance and the impact performance of the parts are improved on the premise that the high strength is kept on other portions. The method includes the implementation steps of according to three-dimensional structures of a trimming and hole punching region and an impact energy absorption region, designing corresponding high-frequency induction heating coils, partially tempering or annealing the trimming and hole punching region and the impact energy absorption region to enable the trimming and hole punching region and the impact energy absorption region to be at certain temperature, achieving the gradient changes of the tempering or annealing temperature, carrying out air cooling on the partially-tempered or partially-annealed parts to enable the partially-tempered or partially-annealed parts to be at certain temperature, and finally and rapidly moving the air-cooled hot stamping formed parts to a trimming and hole punching mold to carry out mold trimming and hole punching.

The invention discloses 1000 MPa-level high-strength high-plasticity aluminum-containing medium manganese steel and a manufacturing method thereof. The steel comprises the following chemical components by mass percent: 0.05-0.25% of C, 0.02-0.40% of Si, 7.0-11% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.015% of S, 1.50-3.50% of Al, 0.02-0.60% of Cr, smaller than or equal to 0.50% of Cu, smaller than or equal to 0.40% of Mo, smaller than or equal to 0.10% of Nb, smaller than or equal to 0.010% of N and the balance of Fe and unavoidable impurities. The manufacturing method of the steel comprises the steps of smelting, continuous casting, hot continuous rolling, cover annealing, acid pickling cold rolling, cover annealing or continuous annealing and finishing packing. The steel disclosed by the invention has high strength, excellent cold stamping forming performance and impacting energy absorption performance.

The invention discloses a space lattice material based on curved bar base cells. The material comprises N base cells, each base cell is formed by connecting two sets of curved bars through a base cell inner node, every two adjacent base cells are connected through inter-base-cell nodes, and the three-dimensional space lattice material is formed through extension and expansion of the base cells in x, y and z directions. The curvatures of the both sets of curved bars in each base cell are different, and the curvatures of all the sets of curved bars in every two adjacent base cells in the x, y and z directions are also different, so that rigidity (deformation characteristic) of different directions is changed according to the required gradient. The space lattice material is small in weight and high in strength and has a large impacting deformation capacity and high impacting energy absorption rate, and the excellent impacting resistance characteristic is taken on; and the material is simple in structure, low in production cost, high in applicability and wide in application prospect.