首页> 外文会议>International Conference on Fracture >DEFORMATION AND FRACTURE AT GRAIN BOUNDARIES: CAN WE INCLUDE ATOMISTIC EFFECTS IN MESOSCALE DESCRIPTIONS VIA A FEW PHYSICAL PARAMETERS?
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DEFORMATION AND FRACTURE AT GRAIN BOUNDARIES: CAN WE INCLUDE ATOMISTIC EFFECTS IN MESOSCALE DESCRIPTIONS VIA A FEW PHYSICAL PARAMETERS?

机译:晶界的变形和骨折:我们可以通过几个物理参数在Messcale描述中包含原子作用吗?

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We investigate the mechanical properties of interfaces via ab-initio density functional theory calculations as well as molecular dynamics simulations using embedded atom method type potentials. A scale-bridging model is developed, which captures the relevant processes on the microscopic scale and describes their effect by characteristic parameters that are passed on to the next higher length scale. The parameters are identified from calculations of the response of grain boundaries to a tensile or shear load, e.g. the work of separation and strength of an interface, or the shape parameters of the energy barriers for interfacial sliding.
机译:我们研究了AB-Initio密度函数理论计算的接口的机械性能以及使用嵌入式原子方法型电位的分子动力学模拟。开发了一种尺度桥接模型,其捕获了微观尺度上的相关过程,并通过传递到下一个更高长度比例的特征参数来描述它们的效果。从晶界响应到拉伸或剪切载荷的计算中识别参数,例如,接口的分离和强度的工作,或用于界面滑动的能量屏障的形状参数。

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