Developments in Strategic Materials and Computational Design III
Developments in Strategic Materials and Computational Design III
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战略材料和计算设计的发展 III
DOI：
10.1002/9781118217542.ch9
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Falco S
中科院分区：
文献类型：
--
作者：
Falco S
缺乏对陶瓷材料在装甲应用中的真正变形和破坏机制的理解阻碍了新材料的发展和相应的改进装甲解决方案的潜力。数值模拟在获得所有相关长度尺度所需的理解方面起着关键作用。虽然微观尺度的建模为各种材料特性的作用提供了新的见解，但在宏观尺度上，这些信息可以在设计组件和结构时更准确地模拟弹道材料的行为。然而，现有的用于陶瓷装甲数值模拟的宏观材料模型大多基于连续介质方法，假设各向同性材料对冲击载荷的响应。本工作中提出的本构模型通过将损伤作为张量提出，允许非各向同性行为。此外，该模型通过基于低尺度裂纹扩展的损伤张量演化，结合了控制压缩损伤的物理方面。
The lack of understanding of true deformation and failure mechanisms in ceramic materials for armour applications hinders the development of novel materials and the corresponding potential for improved armour solutions. Numerical modelling plays a key role in gaining the required understanding at all relevant length scales. While micro-scale modelling provides new insights into the role of various material characteristics, at the macro-scale such information enables more accurate simulation of the ballistic material behaviour when designing components and structures. Nevertheless, most of the existing macroscopic material models for the numerical simulation of ceramic armour are still based on continuum approaches assuming isotropic material response to impact loading. The constitutive model presented in this work allows for non-isotropic behaviour by proposing the damage as a tensor. Moreover the model incorporates aspects of the physics governing the compressive damage by basing the damage tensor evolution on considerations of crack growth at lower scales.