Fracture micro mechanisms of ductile porous solids are substantially researched worldwide since last 60 years through different experiments, theories, thermodynamics and computer models. It is still attracting immense interests to the scientists/engineers as evidenced by a slew of many interesting and innovative techniques, different perceptions and philosophies to elucidate ductile fracture micro mechanisms of materials. The damage accumulation (i.e., void volume fraction, f_v) inside a ductile material under tensile deformation is strongly dependent on many engineering/metallurgical variables with their complex and unknown interactions. The role of micro void nucleation and growth during ductile fracture of materials under different environments and loading conditions is well established and documented, but the details of some micro mechanisms governing this fracture process are not still clearly understood. Such as, the coalescence of micro voids has not been clarified clearly, since it is an unstable and rapidly occurred phenomenon in materials. A comprehensive and exhaustive literature review has been performed to realize these facts completely. This article also critically reviews the standard computational methods often widely used for fracture mechanics analysis, which have been proposed/developed by eminent scientists to simulate the ductile fracture of materials. Many studies monitoring the damage accumulation during tensile deformation of different ductile alloys which are, in principle, affected by the imposed stress triaxiality, applied stress and the resulting plastic strains, are already available in the open published literatures. But it is still not clear in these circumstances, whether this damage accumulation is stress assisted or strain induced. In the current investigation, it has been demonstrated through experiments, modeling and reviewing from existing literature that damage accumulation inside a material can be effectively explained by imposed stress triaxiality. This article would be truly being a gift to the structural materials and solid mechanics communities as a whole.

过去60年以来，通过不同的实验，理论，热力学和计算机模型，全球对延性多孔固体的断裂微观机理进行了广泛的研究。它阐明了许多有趣的和创新的技术，阐明材料的延性断裂微观机理的众多有趣和创新技术，不同的观念和哲学，这仍然吸引着科学家/工程师极大的兴趣。损伤累积（即空隙体积分数f _v）在延展变形下的延性材料内部强烈依赖于许多工程/冶金变量，它们之间相互作用复杂且未知。在不同环境和载荷条件下材料的延性断裂过程中，微空隙成核和生长的作用已得到充分确立和记录，但控制该断裂过程的某些微观机制的细节仍不清楚。例如，由于微空隙的聚结是材料中不稳定且快速发生的现象，因此尚未明确阐明。为了全面地了解这些事实，已经进行了详尽而详尽的文献综述。本文还严格审查了通常用于断裂力学分析的标准计算方法，著名科学家已经提出/开发了这些模型，以模拟材料的延性断裂。许多研究监测不同延性合金拉伸变形过程中的损伤积累，这些是原则上，受施加的三轴性应力，施加应力和所产生的塑性应变的影响，已经在公开发表的文献中找到。但是，在这些情况下，这种损伤累积是由压力辅助还是由应变引起的仍不清楚。在当前的研究中，已经通过实验，建模和现有文献的回顾证明，通过施加应力三轴性可以有效地解释材料内部的损伤累积。本文确实是对整个结构材料和固体力学社区的礼物。