首页|基于虚场法的聚氨酯材料本构参数反演

基于虚场法的聚氨酯材料本构参数反演

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为揭示聚氨酯材料的超弹特性,本文对邵氏硬度90A的聚氨酯试件进行了单轴拉伸实验,首先通过数字图像相关法(DIC)获得了试件的全场变形,然后基于虚场法(VFM)的数值程序反演了二阶Mooney-Rivlin模型和Ogden模型的本构参数,最后通过有限元模型更新法(FE-MU)与VFM进行了比较.结果表明:基于VFM获得的二阶Mooney-Rivlin超弹性本构模型和Ogden超弹性本构模型的载荷-位移曲线与实验所得的载荷-位移曲线高度吻合,而通过FEMU获得的Ogden模型的载荷-位移曲线与实验所得的载荷-位移曲线吻合度不理想,从而揭示了VFM比FEMU对聚氨酯材料本构参数反演更有优势.
Inversion of constitutive parameters of polyurethane materials based on virtual field method
To reveal the superelastic properties of polyurethane materials,this paper conducted uniaxial tensile tests on polyurethane specimens with a Shore hardness of 90A.Firstly,the full field deformation of the specimens was obtained using Digital Image Correlation(DIC),and then the constitutive parameters of the second-order Mooney-Rivlin model and Ogden model were inverted using a numerical program based on the Virtual Field Method(VFM).Finally,a comparison was made between the Model Update Method(FEM)and the VFM.The results show that the load displacement curves of the second-order Mooney-Rivlin hyperelastic constitutive model and Ogden hyperelastic constitutive model obtained based on the VFM are highly consistent with the experimental load displacement curves,while the load displacement curves of the Ogden model obtained through the finite element model updating method do not match well with the experimental load displacement curves.These results reveal the advantages of the virtual field method over the finite element model updating method in inverting the constitutive parameters of polyurethane materials.

polyurethane materialdigital image correlation methoduniaxial tensile testvirtual field methodfinite model updating methodsecond-order Mooney-Rivlin modelOgden model

牟春凯、周继磊、代祥俊、陈强强

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山东理工大学交通与车辆工程学院实验力学实验室,山东淄博 255000

聚氨酯材料 数字图像相关法 单轴拉伸实验 虚场法 有限元模型更新法 二阶Mooney-Rivlin模型 Ogden模型

2024

实验力学
中国力学学会 中国科技大学

实验力学

CSTPCD北大核心
影响因子:0.522
ISSN:1001-4888
年,卷(期):2024.39(6)