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Emergence of pseudo-ductility in laminated ceramic composites

机译：叠层陶瓷复合材料中拟延展性的出现

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In this article, we explore the origins of pseudo-ductility in the inelastic response of laminated ceramic composites. By pseudo-ductility, we mean the engineered ductility of ceramic laminated composites by a strategic placement of the weak interfaces. For purposes of modeling, a phase field based brittle fracture approach is adopted and we use it to numerically study the response of such composites. This approach has the advantage of seamlessly modeling the growth of cracks through the interface as well as into the lamina. A finite element implementation of this brittle fracture model is carried out, using which the response of laminated ceramics is computed and compared with available experimental evidence in the literature. This implementation is also used to study the influence of geometric and material properties on the response, especially the damage propagation through ceramic laminates. Along with important geometric aspects such as the lamina thickness distribution and interface geometry, we also study how material properties like Young's modulus and critical energy release rate of the interface may play a role in the engineered pseudo-ductility.
机译：在本文中，我们探讨了叠层陶瓷复合材料非弹性响应中伪延展性的起源。伪延展性是指通过战略性地布置薄弱界面来实现陶瓷层压复合材料的工程延展性。为了进行建模，采用了基于相场的脆性断裂方法，我们将其用于数值研究此类复合材料的响应。这种方法的优点是可以无缝地模拟通过界面以及进入板层的裂纹扩展。进行了该脆性断裂模型的有限元实现，使用该有限元实现计算了层压陶瓷的响应，并与文献中的可用实验证据进行了比较。此实现方式还用于研究几何和材料特性对响应的影响，尤其是通过陶瓷层压板传播的损伤。除了重要的几何方面，例如层厚度分布和界面几何形状，我们还研究了诸如杨氏模量和界面的临界能量释放速率之类的材料特性如何在工程拟延性中发挥作用。

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