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arXiv 1303.1901cond-mat.soft
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梁的非线性弹性弯曲中的拉压差

Differences in tension and compression in the nonlinearly elastic bending of beams

Michel Destrade, Jerry G. Murphy, Badar Rashid

摘要:

对于拉压力学响应不同的弹性材料--所谓的双模材料,重新讨论了经典的非线性不可压缩弹性弯曲问题。选择弯曲问题来研究这种响应,因为两个区域,一个是拉伸区域,一个是压缩区域,可以很容易地用简单的直觉来识别。两个不同的问题被认为是:第一个是假设应力连续跨越两个区域的边界,这一假设有一个良好的物理基础。考虑的第二个问题更具推测性:它是在哪里允许应力不连续。结果表明,这种不连续性是必要的许多应用程序的小,但可能仍然提供了一个解释的重复弯曲所造成的损害。还提出了弹性体双模性可能性的一些实验证据。

英文摘要:

The classical flexure problem of non-linear incompressible elasticity is revisited for elastic materials whose mechanical response is different in tension and compression---the so-called bimodular materials. The flexure problem is chosen to investigate this response since the two regions, one of tension and one of compression, can be identified easily using simple intuition. Two distinct problems are considered: the first is where the stress is assumed continuous across the boundary of the two regions, which assumption has a sound physical basis. The second problem considered is more speculative: it is where discontinuities of stress are allowed. It is shown that such discontinuities are necessarily small for many applications, but might nonetheless provide an explanation for the damage incurred by repeated flexure. Some experimental evidence of the possibility of bimodularity in elastomers is also presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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