摘要:
A motor vehicle body including a plurality of vertical pillars (22) defining therebetween a plurality of door frames for access to a passenger compartment of the vehicle body, a plurality of doors supported by pairs of hinges on the front vertical pillar of each door frame for pivotal movement between closed and open positions, and a light weight side impact protection barrier (48) characterized by high elongational stiffness and high strain-at-failure. The light weight barrier may be employed alone or in combination with a horizontal door beam and includes a synthetic cable (54) in the door made from a plurality of helically braided bundles of fibers selected from a group of fibers consisting of aramid fibers and liquid crystal polymer fibers characterized by a strain-at-failure exceeding about 3%. The synthetic cable (54) includes attachments to the front and rear pillars of the door frame when the door is closed. The synthetic cable is very stiff in tension to suppress intrusion into the passenger compartment and has a failure mode characterized by serial or sequential failure of individual ones of the fibers rather than simultaneous failure of all of the fibers.
摘要:
A method for achieving a constant average deceleration of a vehicle is disclosed. In an exemplary embodiment, the method includes comparing an effective load mass of the vehicle to a baseline load mass. If the effective load mass differs from the baseline load mass by at least a designated percentage, then upon detection of a vehicle impact, energy absorbing structures (22) within the vehicle are adjusted so as to alter crush forces of the vehicle, thereby resulting in a desired average deceleration of the vehicle.
摘要:
An energy absorbing assembly (10) includes a covering (12); and a shape memory material (14) in operative communication with the covering (12), wherein the shape memory material (14) has a first shape attached to an underside of the covering (12) and is operative to change to a second shape in response to an activation signal. The second shape of the shape memory material (14) can cause the covering (12) to expand or expand and detach from a surrounding surface medium. The energy absorbing assembly (10) is used to absorb kinetic energy of an object impacting the assembly. Methods of operating the assembly are also disclosed.
摘要:
A releasable fastener system (10) comprises a loop portion (12) and a hook portion (14). The loop portion (12) includes a support (16) and a loop material (18) disposed on one side thereof whereas the hook portion (14) includes a support (20) and a plurality of closely spaced upstanding hook elements (22) extending from one side thereof. When the hook portion (14) and loop portion (12) are pressed together they interlock to form a releasable engagement. The resulting joint created by the engagement is relatively resistant to shear and pull forces and weak in peel strength forces. The hook elements (14) are formed of a material or have configurations that provide a shape changing capability and/or change in flexural modulus property to the hook elements. In this manner, the shape and/or flexural modulus of the hook elements can be remotely changed to provide a reduction in the shear and/or pull-off forces.
摘要:
An impact absorbing device for a vehicle uses a shape memory material that can be heated to repair deformation from a relatively low speed, low energy impact and its stroking force and energy absorption can be tuned by heating. The shape memory material is suitably used in a crash box (14) having an inserted impact absorbing ram (16), the box being placed, for example, between a bumper (18) and strong body member. The shape memory material is attached to the box and ram for absorbing energy as the ram is driven into the box. Heating means is provided to repair or tune the shape memory material.
摘要:
An impact absorbing device for a vehicle uses a shape memory material that can be heated to repair deformation from a relatively low speed, low energy impact and its stroking force and energy absorption can be tuned by heating. The shape memory material is suitably used in a crash box (14) having an inserted impact absorbing ram (16), the box being placed, for example, between a bumper (18) and strong body member. The shape memory material is attached to the box and ram for absorbing energy as the ram is driven into the box. Heating means is provided to repair or tune the shape memory material.