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| 基于GISSMO断裂准则的6016铝合金断裂行为研究 |
| Fracture Behavior of 6016 Aluminum Alloy Based on GISSMO Criterion |
| Received:January 04, 2022 |
| DOI：10.3969/j.issn.1674-6457.2022.04.001 |
| 中文关键词: GISSMO 断裂极限 6016铝合金 失效准则 |
| 英文关键词: GISSMO fracture limit 6016 aluminum alloy fracture criterion |
| 基金项目:国家自然科学基金(51805375) |
| Author Name | Affiliation | | KONG Jie | School of Mechanical Engineering, Tongji University, Shanghai 201804, China | | DENG Lu-lu | Pan Asia Technical Automotive Center Co., Ltd., Shanghai 201206, China | | LIU Yi | School of Mechanical Engineering, Tongji University, Shanghai 201804, China | | MIN Jun-ying | School of Mechanical Engineering, Tongji University, Shanghai 201804, China |
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| 中文摘要: |
| 目的 研究零部件在成形与碰撞过程中，6016铝合金在不同应力状态下的断裂行为。方法 通过准静态拉伸实验，获得了6016铝合金的基本力学性能。利用Nakajima成形极限实验，获得了6016铝合金材料的断裂成形极限曲线。设计了7种涵盖成形及碰撞过程中应力状态的断裂极限测试试样，采用数字图像相关技术(DIC)记录了试样在变形过程中的全场应变。利用实验-有限元反求方法标定了6016铝合金的GISSMO断裂准则的参数，并用帽形件三点弯曲实验验证了模型的合理性。结果 相比于传统断裂成形极限图的预测结果，基于GISSMO断裂准则的仿真结果与实验具有更好的一致性。结论 所建立的GISSMO模型可以用于预测6016铝合金在复杂应力状态下的断裂行为。 |
| 英文摘要: |
| The work aims to study the fracture behavior of 6016 aluminum alloy in forming and crashing simulation. The mechanical property of 6016 aluminum alloy was obtained by quasi-static uniaxial tension experiment and the fracture forming limit curves (FFLC) of 6016 aluminum alloy were obtained by conducting Nakajima experiment. Seven types of specimens were designed to obtain the fracture limits under different stress states which commonly occur during forming and crashing. The strain field of the specimens was recorded by digital image correlation (DIC) method. The hybrid experimental–numerical method was used to calculate the parameters of GISSMO criterion. The reasonability of the model was verified by the three-point bending experiment of hat-shaped parts. The results showed that the prediction results of GISSMO model were in better agreement with the experimental results compared with that of the conventional FFLC. The GISSMO model established in this paper is proved to be suitable for predicting the fracture behavior of 6016 aluminum alloy under complex stress states. |
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