缩小速率相关塑性与应力波动力学之间的差距:通过逆向优化校准高强度钢的构造模型

IF 5.1 2区 工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Impact Engineering Pub Date : 2024-08-17 DOI:10.1016/j.ijimpeng.2024.105087
Robbert Rietkerk, Patrick Früh, Lena Lörcher , Martin Sauer, Andreas Heine, Werner Riedel
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引用次数: 0

摘要

我们提出了一种量化动态载荷下金属流动应力的方法,该方法基于涉及不同但相关物理现象的实验。在改良泰勒试验中,测量应力波产生的速度-时间信号,可间接提供被测材料在高应变速率下的塑性变形行为信息。根据这些测量数据,结合准静态和动态拉伸试验数据,对高强度钢的约翰逊-库克塑性模型进行了校准。通过对材料试验模拟进行反向优化,以差分演化的方式找到塑性模型参数。最终确定了一套一致的模型参数,可以再现所有类型试验的测量结果。所获得的塑性模型具有较小的初始屈服应力,并通过较大的应变硬化进行补偿,从而产生现实的工程屈服应力。通过对准静态和动态拉伸试验结果进行回归,采用了一种独立的校准方法,证实了塑性模型参数值的有效性。
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Bridging the gap between rate-dependent plasticity and stress wave dynamics: Calibrating a constitutive model for high-strength steel by inverse optimization

We present an approach for quantifying the flow stress of metals under dynamic loads, based on experiments that involve distinct but related physical phenomena. In modified Taylor tests, a stress-wave generated velocity–time signal is measured, which indirectly provides information on the plastic deformation behavior of the tested material at high strain rate. The Johnson–Cook plasticity model is calibrated for a high-strength steel on the basis of such measurements in combination with quasi-static and dynamic tensile test data. The plasticity model parameters are found with differential evolution through the inverse optimization of material test simulations. A consistent set of model parameters is identified that reproduces measurements from all types of tests. The obtained plasticity model features a small initial yield stress, which is compensated by large strain hardening so as to produce a realistic engineering yield stress. An independent calibration method is employed, by regression of the model on quasi-static and dynamic tensile test results, that confirms the validity of the plasticity model parameter values.

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来源期刊
International Journal of Impact Engineering
International Journal of Impact Engineering 工程技术-工程:机械
CiteScore
8.70
自引率
13.70%
发文量
241
审稿时长
52 days
期刊介绍: The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications
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