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Numerical Evaluation of Surface Roughness Influences on Cold Formability of Dual‐Phase Steel
Steel Research International ( IF 2.2 ) Pub Date : 2020-07-03 , DOI: 10.1002/srin.202000141
Peerapon Wechsuwanmanee 1 , Junhe Lian 2 , Wenqi Liu 2 , Sebastian Münstermann 1
Affiliation  

DP1000 steel sheets with different surface treatments are taken to three‐point bending tests to evaluate their damage and fracture behavior. It is found that different surface treatments yield different fracture behaviors. Conventional finite‐element (FE) simulation with an uncoupled material model is able to capture the material's response only for the sheets with the perfectly smooth surface condition. A multiscale strategy is introduced to quantitatively include the surface information into the material model. The localization at the microlevel simulation allows adjusting the fracture criterion of the surface elements in the macrolevel simulation. Therefore, a good agreement between FE simulation and experiment is yielded.

中文翻译:

表面粗糙度对双相钢冷成形性能影响的数值评估

将经过不同表面处理的DP1000钢板进行三点弯曲测试,以评估其损坏和断裂行为。发现不同的表面处理产生不同的断裂行为。具有非耦合材料模型的常规有限元(​​FE)仿真仅能够捕获具有完美光滑表面条件的板材的材料响应。引入了多尺度策略以将表面信息定量地包含到材料模型中。在微观仿真中进行局部化可以在宏观仿真中调整表面元素的断裂准则。因此,在有限元模拟和实验之间取得了良好的一致性。
更新日期:2020-07-03
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