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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part B. Journal of engineering manufacture >Combined numerical and experimental study to predict the forming limit curve of boron steel sheets at elevated temperatures
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Combined numerical and experimental study to predict the forming limit curve of boron steel sheets at elevated temperatures

机译：结合数值和实验研究，以预测升高温度下硼钢板的成形极限曲线

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摘要

The aim of this study involved evaluating and predicting forming limit curves of boron steel 22MnB5 sheet at elevated temperatures. A finite-element method simulation was adopted based on ductile fracture criteria and simple experiments at elevated temperatures. First, tensile experimental data and ductile fracture criterions of Johnson-Cook and ductile void growth models were input to ABAQUS/Explicit software to predict and compare the same with fracture occurrence in experiments performed via Hecker's punch stretching tests at room temperature. Subsequently, punch stretching test data at room temperature were added to correct the fracture strain locus in the space of the stress triaxiality and the equivalent strain following the ductile void growth model. After confirming the accuracy of the forming limit curve prediction at room temperature, fracture strain loci at high temperatures using ductile void growth model were determined based on the average ratio between the fracture equivalent plastic strains at room temperature as well as higher temperatures. Finally, Hecker's punch stretching tests were numerically simulated to predict forming limit curve(s) of boron steel 22MnB5 sheet at high temperatures.
机译：该研究的目的涉及在升高的温度下评估和预测硼钢22MnB5片的形成极限曲线。基于延性骨折标准和升高温度的简单实验采用有限元方法模拟。首先，Johnson-Cook和Ductife Void Grows模型的拉伸实验数据和延展性裂缝标准被输入到ABAQUS /显式软件中，以预测和比较通过在室温下通过Hecker的冲压拉伸试验进行的实验中的裂缝发生。随后，加入室温下的冲头拉伸试验数据以校正应力三轴的空间中的断裂应变基因座，并在延展性空隙生长模型后的等效菌株。在确认在室温下的成形限制曲线预测的精度之后，基于室温下断裂当量塑料菌株与较高温度的平均比率确定使用延展性空隙生长模型的高温下的断裂应变基因座。最后，在数值上模拟Hecker的冲压拉伸试验以预测高温下的硼钢22MnB5片的形成极限曲线。

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