Quantitative prediction of impact forces in elastomers
Quantitative prediction of impact forces in elastomers
复制标题
弹性体冲击力的定量预测
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
C. Aloisio
中科院分区：
文献类型：
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作者：
S. Goyal;R. Larson;C. Aloisio
我们测量的冲击力和变形所产生的质量下降测试到各种弹性体材料的平垫上的一个平坦的冲击表面，并表明，该部队可以定量预测，没有可调的参数，通过使用一个理论，其唯一的输入是线性粘弹性特性的材料，在小振幅振荡变形测量。该理论将弹性体建模为非线性新胡克材料，对于多种弹性体固体（包括聚氨酯、聚苯乙烯和聚氯乙烯（PVC）），在很宽的冲击速度、质量、温度和衬垫厚度范围内是准确的。采取一些步骤将模型扩展到不平坦的表面。考虑的应用是耐冲击便携式电子设备中弹性体部件的合理设计。
We measure the impact forces and deflections resulting from drop tests of a mass with a flat impact surface onto flat pads of various elastomeric materials, and show that the forces can be predicted quantitatively with no adjustable parameters by using a theory whose only inputs are the linear viscoelastic characteristics of the material, measured in small-amplitude oscillatory deformations. The theory, which models the elastomer as a nonlinear neo-Hookean material, is accurate for several elastomeric solids including polyurethanes, polynorbornene, and poly-vinyl-chlorides (PVCs), over a wide range of impact velocities, masses, temperatures and pad thicknesses. Some steps are taken to extend the model to surfaces which are not flat. The application in mind is the rational design of elastomeric components in impact-tolerant portable electronic equipment.