PHS1500热成形钢断裂性能表征与应用研究OA
Research on Characterization and Application of Fracture Properties in PHS1500 Hot-Stamped Steel
以微合金化PHS1500热成形钢为研究对象,通过准静态和动态拉伸试验,获得材料的塑性变形特点,采用Gosh-Voce混合硬化模型描述材料变形行为,并设计了6种不同应力状态加载试样,结合DIC技术,获得材料的断裂应变,采用MMC失效准则进行参数识别,建立了PHS1500热成形钢复杂应力下的高精度断裂模型.对PHS1500热成形钢前防撞横梁进行落锤冲击试验及仿真分析,试验和仿真结果的零件失效位置一致,并且两者的峰值载荷相对误差仅为5.41％,说明硬化模型和断裂模型可以较好地描述PHS1500钢的塑性变形及断裂过程,为整车碰撞仿真提供模型支撑.
This study investigates microalloyed PHS1500 hot-stamped steel,characterizing its plastic deformation behavior through quasi-static and dynamic tensile tests.The Gosh-Voce mixed hardening model was employed to describe the deformation behavior of the material.Specimens under six different loading stress states were designed for the experiment,and the fracture strain of the material was obtained using DIC technology.The Modified Mohr-Coulomb(MMC)failure criterion was applied for parameter identification,thereby establishing a high-precision fracture model for PHS1500 steel under complex stress conditions.A drop-weight impact test and finite element simulations were conducted on a front bumper beam made of PHS1500 steel.The failure locations in the test and simulation results are consistent,and the relative error in peak load is only 5.41％.These results show that the proposed hardening and fracture models can effectively describe the plastic deformation and fracture process of PHS1500 steel,providing reliable model support for full-vehicle crash simulation.
张德良;冯毅;高翔;路洪洲;辛丽娜
中国汽车工程研究院股份有限公司,重庆 401122中国汽车工程研究院股份有限公司,重庆 401122中国汽车工程研究院股份有限公司,重庆 401122中信微合金化技术中心,北京 100004中国汽车工程研究院股份有限公司,重庆 401122
矿业与冶金
PHS1500混合硬化模型MMC模型落锤冲击
PHS1500 steelmixed hardening modelMMC modeldrop-weight impact test
《汽车工程学报》 2026 (3)
361-370,10
国家重点研发计划项目(2016YFB0101607)
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