INTERNAL RUPTURE OF BONDED RUBBER CYLINDERS IN TENSION
INTERNAL RUPTURE OF BONDED RUBBER CYLINDERS IN TENSION
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DOI：
10.1098/rspa.1959.0016
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发表时间：
1959-01-01
影响因子：
--
通讯作者：
LINDLEY, PB
中科院分区：
文献类型：
--
作者：
GENT, AN;LINDLEY, PB
描述了一个不寻常的破裂过程。它包括在一个明确的和相对较小的拉伸载荷下，粘接的橡胶圆筒突然出现内部裂纹。裂纹发生在所有被检查的硫化橡胶中，并且在特别弱的橡胶中发现引起失效。它们的出现也可能导致载荷-挠度关系的显著变化。提出了一种理论处理的基础上提出的裂纹形成的准则。据推测，它们形成时，负静水压力分量的施加的应力达到一个临界值。本文用弹性大变形理论指出，橡胶中的任何空穴都存在一个破裂的临界负压值，计算值与实验值符合得很好。此外，该理论成功地预测了所观察到的开裂应力对橡胶的杨氏模量的依赖性，它的虚拟独立的橡胶的强度和延伸性，以及所观察到的开裂应力和裂纹的分布随试件的厚度的变化的一般形式。
An unusual rupture process is described. It consists of the sudden appearance of internal cracks in bonded rubber cylinders at a well-defined and comparatively small tensile load. The cracks occur in all the vulcanizates examined, and in particularly weak rubbers are found to cause failure. Their appearance may also lead to marked changes in the load-deflexion relationship. A theoretical treatment is presented on the basis of a proposed criterion for crack formation. It is assumed that they form when the negative hydrostatic pressure component of the applied stress reaches a critical value. It is shown by means of the theory of large elastic deformations that a critical value of the negative pressure exists at which any cavity in the rubber will burst, and the calculated value is shown to be in satisfactory agreement with experiment. Moreover, the theory successfully predicts the observed dependence of the cracking stress on the Young’s modulus of the rubber, its virtual independence of the rubber strength and extensibility, and the general form of the observed variation of cracking stress and crack disposition with the thickness of the test-piece.