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On the probabilistic-deterministic transition involved in a fragmentation process of brittle materials

机译:关于脆性材料破碎过程中的概率确定性转变

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Dynamic loadings produce high stress waves leading to the fragmentation of brittle materials such as ceramics, concrete, glass and rocks. The main mechanism used to explain the change of the number of fragments with stress rate is a shielding phenomenon. However, under quasi-static loading conditions, a weakest link hypothesis may be applicable. Therefore, depending on the local strain or stress rate, different fragmentation regimes are observed. One regime corresponds to single fragmentation for which a probabilistic approach is needed. Conversely, the multiple fragmentation regime may be described by a deterministic approach. The transition between the two fragmentation regimes is discussed for high performance concrete, glass and SiC ceramics.
机译:动态载荷会产生高应力波,导致脆性材料(如陶瓷,混凝土,玻璃和岩石)破碎。用来解释碎片数量随应力变化的主要机制是屏蔽现象。但是,在准静态载荷条件下,最弱的链路假设可能适用。因此,根据局部应变或应力率,观察到不同的破碎方案。一种方案对应于需要一种概率方法的单个碎片。相反,可以通过确定性方法描述多重片段化方案。对于高性能混凝土,玻璃和SiC陶瓷,讨论了两种破碎状态之间的过渡。

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