Abstract
In this work, the small lateral-compression testing based on energy equivalent (SLT-EE) method is put forward to determine the stress–strain curves of materials utilizing small disk specimens. Numerical simulations of small lateral-compression testing with imaginary materials are conducted to examine the validity of the SLT-EE method. The results demonstrate that the stress–strain curves determined by the SLT-EE method coincide with the curves input by finite element analysis. In order to predict the stress–strain curves of materials with different dimensions, a modified SLT-EE method is successfully proposed by introducing a correction factor f. Finally, the small disk compression experiments of Q345B, 304, 7075 and 6061 are performed. The stress–strain curves of the four materials predicted by the SLT-EE method show agreement with the tension results. Furthermore, the mechanical properties of in-service hollow components are also determined utilizing the same method successfully.
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The authors gratefully acknowledge the financial support from the key projects of the National Natural Science Foundation of China (Grant No. 11632001) and the innovative development foundation of Chinese Academy of Engineering Physics (Grant No. PY20200046).
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Peng, Y., Jia, D., Wang, L. et al. Determination of the Uniaxial Stress–Strain Relations of Ductile Materials by Small Disk Specimens. Acta Mech. Solida Sin. 34, 252–262 (2021). https://doi.org/10.1007/s10338-020-00205-9
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DOI: https://doi.org/10.1007/s10338-020-00205-9