Evaluation of the true-strength characteristics for isotropic materials using ring tensile test

• Main Authors: A.S. Frolov, I.V. Fedotov, B.A. Gurovich
• Format: Article
• Language: English
• Published: Elsevier 2021-07-01
• Series: Nuclear Engineering and Technology
• Subjects: 42XNM alloy; Ring tensile test; Compression test; True hardening curve; Digital image correlation; FEM
• Online Access: http://www.sciencedirect.com/science/article/pii/S1738573321000541

The paper proposes a technique for reconstructing the true hardening curve of isotropic materials from ring tensile tests. Neutron irradiated 42XNM alloy tensile properties were investigated. The calculation of the true hardening curve for tensile and compression tests of standard cylindrical samples was performed at the first step. After that, the FEM-model was developed and validated using the ring tension and compression tests (with the hardening curve defined in step 1). Finally, the true hardening curve was calculated by selecting the FEM-model parameters and its validation by ring sample tests in different states using an iterative method. For these samples, experimental and calculated gauge length values were obtained, and the corresponding material’s constants were estimated.