论文标题
应力驱动的弹性颗粒常规包装中空缺的分数化
Stress driven fractionalization of vacancies in regular packings of elastic particles
论文作者
论文摘要
阐明在微观水平上缺陷和压力的相互作用是一个基本的物理问题，与材料科学有很强的联系。在这里，基于二维晶体模型，我们表明具有不同大小和形态的空缺模式符合常见情况。压缩下的空缺被裂变成一对在边界上滑动和消失的位错。该整洁的过程是由空位周围的局部剪切应力触发的。空缺的显着分数在空缺和其他拓扑缺陷之间创造了丰富的相互作用模式，并为广泛的结构结构中缺陷的机械工程提供了一个新的维度。
Elucidating the interplay of defect and stress at the microscopic level is a fundamental physical problem that has strong connection with materials science. Here, based on the two-dimensional crystal model, we show that the instability mode of vacancies with varying size and morphology conforms to a common scenario. A vacancy under compression is fissioned into a pair of dislocations that glide and vanish at the boundary. This neat process is triggered by the local shear stress around the vacancy. The remarkable fractionalization of vacancies creates rich modes of interaction between vacancies and other topological defects, and provides a new dimension for mechanical engineering of defects in extensive crystalline structures.
