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首页> 外文期刊>Philosophical Magazine Letters >Flaw tolerance promoted by dissipative deformation mechanisms between material building blocks
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Flaw tolerance promoted by dissipative deformation mechanisms between material building blocks

机译：材料构件之间的耗散变形机制提高了缺陷容限

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摘要

Novel high-performance composite materials often draw inspiration from natural materials such as bone or mollusc shells. A prime feature of such composites is that they are, like their natural counterparts, quasibrittle. They are tolerant to material flaws up to a certain characteristic flaw-tolerant size scale, exhibiting high strength and toughness, but start to behave in a brittle manner when sufficiently large flaws are present. Here, we establish that better flaw tolerance can be achieved by maximizing fracture toughness relative to the maximum elastic energy available in the material, and we demonstrate this concept with simple two-dimensional coarse-grained simulations where the transition from brittle to quasibrittle behaviour is examined.
机译：新型高性能复合材料通常会从天然材料（如骨头或软体动物壳）中汲取灵感。这种复合材料的主要特征是，与天然复合材料一样，它们是准脆性的。它们可以耐受材料缺陷，直至达到特定的特征缺陷尺寸尺寸，显示出高强度和韧性，但是当存在足够大的缺陷时，它们开始以脆性方式表现。在这里，我们确定可以通过相对于材料中可用的最大弹性能量最大化断裂韧性来实现更好的缺陷容忍度，并且我们通过简单的二维粗粒度模拟来论证此概念，其中检查了从脆性到准脆性行为的转变。

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