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首页> 外文期刊>Journal of Mechanical Science and Technology >A method to construct the fracture locus in the range of high stress triaxiality when only a round tensile specimen is available
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A method to construct the fracture locus in the range of high stress triaxiality when only a round tensile specimen is available

机译：当仅提供圆形拉伸样品时，在高应力三轴分别范围内构建裂缝基因座的方法

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摘要

Our aim was to develop a method to construct a fracture locus for tensile loading with large positive values of stress triaxiality with only a round tensile specimen. Previously, at least three repetitions of tensile tests using a round tensile specimen, circumferentially notched tensile specimen and circumferentially cracked tensile specimen were required when we constructed the fracture locus. A fundamental idea considered in this study is to modify the Hancock and Mackenzie model by relating void nucleation strain to strain at necking and replacing the parameter in the model with a material constant depending on strain hardening coefficient. Validity of the proposed method was verified by comparing fracture loci constructed using the proposed method with data set measured by earlier researchers. Fracture loci constructed by the proposed method are in agreement with data set for ductile steels with yield stress in the range of 200-500 MPa and uniform strain of material is higher than 0.1.
机译：我们的目的是开发一种方法，用于构建裂缝基因座，用于用圆形拉伸试样的应力三轴的大量阳性值构建拉伸载荷。以前，当我们构建骨折基因座时，需要使用圆形拉伸试样的拉伸试验的至少三次重复的拉伸试验和周向裂纹的拉伸样品。本研究中考虑的基本思想是通过将空隙成核菌株与缩小的菌株相关并取代模型中的参数，根据应变硬化系数来更换模型中的参数。通过比较使用所提出的方法构造的裂缝基因座来验证所提出的方法的有效性，通过提前的研究人员测量的数据集。由所提出的方法构建的裂缝基因座与屈服钢的数据集合一致，其屈服应力在200-500MPa的范围内，并且材料的均匀应变高于0.1。

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