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Numerical modelling of damage zone with bridging effect in brittle ceramic materials using FEM

机译：脆性陶瓷材料磨损区损伤区的数值模拟

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摘要

The computer simulation of physical processes is one of the current directions of research development of body structures behaviour. The method, which was worked out (experimentally confirmed), gives an opportunity to analyse the same problems numerically, without expensive experiment. Recently the finite element method (FEM) has been used to investigate the above problems, Cao and Sakai (1996), Niezgoda and others (1998). The authors of this paper consider crack-face bridging, the stress field and the stress intensity factor ahead of the crack tip in the single-edge notched bend (SENB) ceramics specimen using FEM. In the FEM calculations the cohesive forces caused by the bridging effect were modelled using non-linear elastic springs. To solve this non-linear problem the incremental procedure was used. The results of this analysis are the stresses and displacements on the bridging crack and external load, which allow to compute the stress intensity factor and fracture energy.
机译：物理过程的计算机模拟是身体结构行为的研究发展的当前方向之一。制定的方法（实验证实），提供了在数量上分析相同问题的机会，而无需昂贵的实验。最近，有限元方法（FEM）已被用于调查上述问题，Cao和Sakai（1996），Niezgoda等（1998）。本文的作者考虑了使用FEM的单边缘缺口弯曲（SENB）陶瓷样品的裂缝尖端的裂缝面桥接，应力场和应力强度因子。在FEM计算中，使用非线性弹性弹簧进行建模由桥接效果引起的粘性力。要解决此非线性问题，使用增量过程。该分析的结果是桥接裂缝和外部负荷上的应力和位移，其允许计算应力强度因子和断裂能量。

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