arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2012.07700cond-mat.stat-mech
收藏

无序多相材料断裂中空间模式的作用

Role of spatial patterns in fracture of disordered multiphase materials

Rajat Pratap Singh Parihar, Dhiwakar V. Mani, Anuradha Banerjee, R. Rajesh

摘要:

多相材料,如复合材料,在宏观缺陷的生长过程中表现出多种竞争失效机制。为了模拟这种材料的整体断裂过程,我们开发了一个两相弹簧网络模型,该模型考虑了不同组件之间的结构以及各自的故障特征。在一个平纹编织架构的特定情况下,我们表明,层之间的任何偏移减少了裂纹尖端的应力的离域,从而大大降低了整体层压板的强度和断裂韧性。断裂弹簧的雪崩统计数据并没有显示出对层间偏移量的明显依赖性。幂律指数被发现是远远小于无序弹簧网络模型在没有裂纹。讨论了雪崩统计是近击穿统计的可能性。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑