Micromechanical Modelling of Ductile Failure

开发更坚固、更坚韧的结构材料需要 更好地理解延性的宏观测量， 断裂过程的微观结构机制。 这是一个研究 作为连续统的限制， 微观尺度的力学已经被认识到。 该研究调查了断裂的微观力学模型， 过程 该方法涉及成核的本构描述， 微空隙的生长和聚结。 特别重要 颗粒脱粘空穴形核及空穴形成机理 聚结 大规模的数值分析将被用来进行 将微观模型转化为宏观尺度， 并观察到断裂中的韧性行为。 首席调查员因其工作而享有国际声誉 在韧性断裂数值模拟中， 这个研究项目 提供了一个扩展断裂过程建模的机会 进入微观尺度。 建议给予奖励。

The development of stronger and tougher structural materials requires a better understanding between macroscopic measures of ductility and microstructural mechanisms of the fracture process. This is a research topic which is of growing importance as the limitations of continuum mechanics in the microscale has been recognized. The research investigates micromechanical modelling of the fracture process. The approach involves constitutive descriptions of nucleation, growth and coalescence of micro voids. Of particular importance in the void nucleation by particle decohesion and the mechanisms of void coalescence. Large scale numerical analyses will be employed to carry the micromodelling into the macroscale where comparisons can be made with observations of ductile behavior in fracture. The principal investigator has an international reputation for his work in numerical simulation of ductile fracture. This research program provides an opportunity to extend the modelling of the fracture process into the microscale. An award is recommended.