An integrated study on the optimal shape design of cruciform specimen used in equibiaxial tensile test of a hyperelastic material

4th International Conference on Mechanical, Materials and Manufacturing

材料科学;机械制造

Pramudita, J.A.^1 ; Kubota, H.^2 ; Tanabe, Y.^1 ; Ito, M.^3 ; Watanabe, R.^3

Mechanical Engineering Program, Faculty of Engineering, Niigata University, Niigata

950-2181, Japan^1

Graduate School of Science and Technology, Niigata University, Niigata

950-2181, Japan^2

Product Analysis Center, Panasonic Corporation, Osaka

571-8686, Japan^3

关键词: Cruciform specimens;    High stress concentration;    Hyperelastic materials;    Mechanical response;    Optimal shape design;    Strain conditions;    Stress-strain response;    Tensile loading;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/272/1/012023/pdf
DOI  :  10.1088/1757-899X/272/1/012023

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

To conduct a finite element analysis of a material exhibiting large deformations (hyperelastic material), hyperelastic Ogden model is commonly used. However, hyperelastic Ogden model requires several tensile tests data including equibiaxial tensile test during the parameter identification. In equibiaxial tensile test, although cruciform-shaped specimen is often adopted as the test specimen, high stress concentration at the corner area causes an early rupture in the specimen. Therefore, it is difficult to obtain the mechanical response of the material under large equibiaxial strain condition. In present study, an experimental study using equibiaxial tensile test device developed previously by authors and a numerical study using finite element analysis were conducted to investigate the stress distribution and the stress-strain response of cruciform specimen under an equibiaxial tensile loading. The optimal shape design of the corner area of the cruciform specimen was then discussed according to the results.