论文标题
空间模式在混乱多相材料断裂中的作用
Role of spatial patterns in fracture of disordered multiphase materials
论文作者
论文摘要
多相材料（例如复合材料）在宏观缺陷的生长过程中表现出多种竞争失败机制。为了模拟此类材料的整体断裂过程，我们开发了一个两阶段的弹簧网络模型，该模型解释了不同组件之间的体系结构以及其失效特征的各个疾病。在普通编织体系结构的特定情况下，我们表明，层之间的任何偏移都会减少裂纹尖端处的应力定位，从而大大降低了整体层压板的强度和断裂韧性。破碎弹簧的雪崩统计数据并未显示出对层之间的偏移的可区分依赖性。在没有裂缝的情况下，发现功率定律指数比无序的春季网络模型小得多。关于雪崩统计数据的可能性是几乎分解的可能性。
Multi-phase materials, such as composite materials, exhibit multiple competing failure mechanisms during the growth of a macroscopic defect. For the simulation of the overall fracture process in such materials, we develop a two-phase spring network model that accounts for the architecture between the different components as well as the respective disorders in their failure characteristics. In the specific case of a plain weave architecture, we show that any offset between the layers reduces the delocalization of the stresses at the crack tip and thereby substantially lowers the strength and fracture toughness of the overall laminate. The avalanche statistics of the broken springs do not show a distinguishable dependence on the offsets between layers. The power law exponents are found to be much smaller than that of disordered spring network models in the absence of a crack. A discussion is developed on the possibility of the avalanche statistics being those near breakdown.
