用于薄片试样弹塑性应力-应变分析的半解析方法

doi:10.7527/S1000-6893.2018.22169

Abstract

Abstract: A semi-analytical model for sheet-funnel specimens and sheet-ring specimens is proposed. The finite element analysis shows that the model is able to describe the monotonous mechanical behaviours of the two kinds of specimens. To gain the load-displacement curves of tensile tests and stable stage of cyclic tests, an uniaxial tensile test and a variable amplitude symmetric-cycle test of sheet-funnel specimens and sheet-ring specimens are carried out. Based on the model and the experimental curves, the uniaxial stress-strain relations and cyclic stress-strain relations of the specimens are predicted. The results show that the stress-strain relations and cyclic stress-strain relations predicted by sheet-funnel specimens and sheet-ring specimens are basically in agreement with those of smooth round bars.

Key words: sheet-funnel specimens, sheet-ring specimens, semi-analytical model, cyclic stress-strain relations, monotonous mechanical behaviours

CLC Number:

LIU Qin, CAI Lixun, CHEN Hui. A semi-analytical method for elastoplastic stress-strain analysis of thin sheet specimens[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(11): 222169-222180.

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A semi-analytical method for elastoplastic stress-strain analysis of thin sheet specimens

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