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Validity Assessment of Ductile Fracture Criteria in Cold Forming

机译:冷成型中韧性骨折标准的有效性评估

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This paper describes the assessment of various empirical and semiempirical ductile fracture criteria to determine their ability to predict the occurrence of fracture in metalforming processes. The criteria assessed are reformulated such that each is expressed in terms of mostly nondimensional material-dependent quantities and constants. The constants in each criterion are determined using data from published experimental results on cold upsetting of aluminum and steel specimens. The limit strain or the forming limit corresponding to each criterion is then determined and compared with the experimental data. There is clearly good agreement between theory and experiment for several criteria, but the predictions of other criteria fall far from experimental results.
机译:本文介绍了各种经验和半透韧性裂缝标准的评估,以确定其预测金属成形过程中骨折发生的能力。 评估的标准是重构的,使得每个依赖性物质依赖性数量和常数表示。 每个标准中的常数使用来自公开的实验结果的数据对铝和钢样本的冷镦锐化来确定。 然后确定与每个标准对应的限制应变或对应的形成限制与实验数据进行比较。 理论与实验之间的若干标准显然有很好的一致性,但其他标准的预测远非实验结果。

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