Direct usage of the wire drawing process for large strain parameter identification
Direct usage of the wire drawing process for large strain parameter identification
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DOI：
10.1007/s12289-018-01458-z
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发表时间：
2019-09-01
影响因子：
2.4
通讯作者：
Bigot, Regis
中科院分区：
文献类型：
--
作者：
Venet, Gabriel;Balan, Tudor;Bigot, Regis
大应变硬化是冷体积成形过程模拟的主要材料描述成分。大菌株的强化鉴定是成本、标准化和代表实验的能力之间的权衡，但迄今为止还没有标准程序。在这种方法中，大应变（大于1）达到使用工业拉丝工艺，并从标准拉伸试验中获得的测量数据进行识别。尽管存在显著的工艺遗传菌株异质性，但快速半分析后处理是可能的。最先进的硬化模型的参数进行了识别，并证明了鲁棒性，以达到远远超过在实验中达到的应变水平。因此，通过使用工业拉丝预应变，从标准（拉伸试验）采集中实现了准确和稳健的大应变硬化建模。
Large strain hardening is the main material description ingredient for cold bulk forming process simulations. Hardening identification of large strains is a trade-off between cost, standardization and the ability to represent the experiment, but there are no standard procedures to date. In this proposed approach, large strains (larger than 1) are reached using an industrial wire drawing process, and measured data for identification are obtained from standard tensile tests. Fast semi-analytical post-processing was possible despite the significant process-inherited strain heterogeneity. The parameters of state-of-the-art hardening models were identified, and the robustness was demonstrated to reach far beyond the strain level attained in the experiments. As a consequence, accurate and robust large strain hardening modelling was achieved from standard (tensile test) acquisition by using industrial wire drawing pre-strains.