纯钼薄板各向异性拉压不对称性本构建模研究  

Constitutive Model of Anisotropic Tension-Compression Asymmetry of Thin Pure Molybdenum Sheet

作　　者：李明辉 罗欢 樊晓光[1] 梁伟娟 代鹏[2] LI Ming-hui;LUO Huan;FAN Xiao-guang;LIANG Wei-juan;DAI Peng(Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment,State Key Laboratory of Solidification Processing,School of Material Science and Engineering,Northwestern Polytechnical University,Xi′an 710072,China;Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China)

机构地区：[1]西北工业大学材料学院凝固技术国家重点实验室陕西省高性能精确成形技术与装备重点实验室,西安710072 [2]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《精密成形工程》2022年第1期28-33,共6页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金(52075448)。

摘　　要：目的对纯钼薄板的各向异性、拉压不对称性以及本构关系进行研究。方法对纯钼薄板进行不同方向的单拉实验、中心带孔试样单拉实验,和纯钼薄板V形弯曲实验,同时结合有限元模拟反推材料力学性能以及对CPB06屈服准则及Swift强化模型进行参数标定,并进行模型可靠性验证。结果纯钼薄板具有一定的面内各向异性、拉压不对称性以及显著的厚向各向异性,通过实验与有限元模拟结合所求得的力学性能参数和本构模型与实验结果吻合较好。结论所提出的反求材料力学性能参数的方法是可靠的,所构建的本构模型可用于指导后续的研究。The work aims to study the anisotropy, tension-compression asymmetry and constitutive relationship of thin pure molybdenum sheet. Uniaxial tensile test of thin pure molybdenum sheet and thin pure molybdenum sheet with center hole and V-bending test of thin pure molybdenum sheet were carried out combined with FEM to deduce the mechanical properties and CPB06 yield criterion of materials, calibrate parameters of Swift reinforcement model, and verify the reliability of the model.Thin pure molybdenum sheet had certain in-plane anisotropy, tension-compression asymmetry, and normal anisotropy. Mechanical properties and constitutive model obtained through combination of experiment and FEM are in good agreement with the experimental results. It is concluded that the method of determining the mechanical properties of materials proposed in this paper is reliable and the constitutive model established can be used to guide the subsequent research.

关 键 词：纯钼薄板 各向异性 拉压不对称性 本构模型 

分 类 号：TG146.412[一般工业技术—材料科学与工程]