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首页> 外文期刊>International Journal of Solids and Structures >Transient response of an elastic plate on crushable material striking a rigid boundary
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Transient response of an elastic plate on crushable material striking a rigid boundary

机译：弹性板对可破碎材料撞击刚性边界的瞬态响应

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摘要

Transient response of an elastic plate on crushable material striking a rigid boundary is analyzed. The crushable material is approximated by a discrete chain of masses and non-linear springs with properties from the non-linear constitutive law of the crushable material. Plate elasticity and crushable material response are uncoupled. Deceleration from impact assumes a rigid but massive plate. The pressure from deceleration is then applied to the elastic plate to evaluate its response. Prior to arrest, when plate and crushable material strike a rigid boundary, a temporary drop in deceleration response is observed depending on relative density (rho) over tilde= rho(f)/p(s), where rho(f) and rho(s), are crushable and parent material densities. This drop is absent when the plate strikes crushable material at rest. Measured deceleration response of an elastic plate on crushable material is modulated by oscillations from plate response with amplitude depending on the obliquity angle of the setup as it strikes the rigid boundary. The difference between "moving-crushable" and "fixed-crushable" configurations is substantial in form and magnitude. A 2D model of a strip with intermediate flexible supports models response of a thin electronic board from deceleration transmitted to its boundaries by a frame mounted on crushable material.
机译：分析了弹性板在撞击刚性边界的可破碎材料上的瞬态响应。可压碎材料通过质量和非线性弹簧的离散链来近似，其特性来自可压碎材料的非线性本构定律。板的弹性和可压碎的材料响应是不相关的。碰撞减速假定板是刚性但巨大的。然后将来自减速的压力施加到弹性板上以评估其响应。在制动之前，当板和可破碎材料碰到刚性边界时，观察到减速响应会暂时下降，具体取决于在波浪号= rho（f）/ p（s）上的相对密度（rho），其中rho（f）和rho（ s）是可压碎和母体材料的密度。当平板撞击静止的可压碎材料时，不会出现该下落。弹性板在可压碎材料上测得的减速度响应通过板响应的振荡进行调制，振幅取决于设置碰到刚性边界时装置的倾斜角度。 “可移动压碎”和“固定可压碎”配置之间的区别在形式和大小上都很大。带中间柔性支撑的条带的2D模型可以模拟薄电子板通过安装在可压碎材料上的框架将减速传递到其边界的响应。

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