纯钼薄板各向异性拉压不对称性本构建模研究

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...

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

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.