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首页> 外文期刊>International Journal of Solids and Structures >Two-dimensional dynamic anc, three-dimensional fracture in viscoelastic materials
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Two-dimensional dynamic anc, three-dimensional fracture in viscoelastic materials

机译：粘弹性材料的二维动态anc，三维断裂

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This paper presents a numerical scheme specially developed for 2-D and 3-D viscoelastodynamic fracture problems. The method, referred to as the spectral scheme, is derived from a spectral form of the viscoelastodynamic boundary integral relation between the traction stresses acting on the fracture plane and the corresponding displacement discontinuities. It accommodates planar cracks of arbitrary shapes embedded in an infinite homogeneous viscoelastic medium and subjected to an arbitrary combination of time- and space-varying tensile and shear loading. A wide range of cohesive models can be incorporated to characterize the failure process taking place in the vicinity of the spontaneously propagating crack rip. Various viscoelastic dynamic fracture problems involving stationary and spontaneously propagating cracks are presented, including a study of the material-induced dissipative effect on the propagation of transient surface waves, and an investigation of the effects of a simple rate-dependent cohesive failure model on spontaneous crack propagation in elastic and viscoelastic materials. (C) 1998 Elsevier Science I-td. All rights reserved. [References: 22]
机译：本文提出了一种专门为2-D和3-D粘弹性弹塑性断裂问题开发的数值方案。该方法称为频谱方案，是从作用在断裂面上的牵引应力与相应的位移不连续性之间的粘弹动力学边界积分关系的谱形式得出的。它可以容纳嵌入无限均质粘弹性介质中的任意形状的平面裂纹，并且可以承受时空变化的拉伸和剪切载荷的任意组合。可以结合各种内聚模型来表征在自发扩展的裂纹撕裂附近发生的破坏过程。提出了涉及固定和自发扩展裂纹的各种粘弹性动态断裂问题，包括对材料引起的耗散对瞬态表面波传播的影响的研究，以及对速率相关的内聚破坏简单模型对自发裂纹的影响的研究。在弹性和粘弹性材料中传播。 （C）1998 Elsevier Science I-td。版权所有。 [参考：22]

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