Novel Flat-SPT Method for Obtaining Mechanical Properties of Ductile Materials and Its Application

doi:10.3901/JME.2024.04.316

Abstract

Abstract: For homogeneous, isotropic and power-law hardening discs under normally loading at its center by a small punch with a flat indenter, based on the energy density equivalence, a novel elastic-plastic model to describe the relationship between the disc dimensions, power-law parameters, load and displacement is proposed, and a flat small punch test(F-SPT) method for obtaining the stress-strain curves and mechanical properties of the materials is developed. Numerical verifications are carried out using 48 kinds of materials with various combinations of elastic modulus, yield strength, and hardening exponent, and F-SPT are conducted for ten metallic materials. The results show that the stress-strain curves obtained by this method are consistent with those preset in finite element analysis and those obtained by uniaxial tensile tests. In addition, the elastic modulus, yield strength and tensile strength obtained by the novel method are in agreement with the uniaxial tensile test results.

Key words: small punch test, energy density equivalence, power-law materials, stress-strain relationship, mechanical properties

CLC Number:

O341

ZHOU Tian, CAI Lixun, HAN Guangzhao. Novel Flat-SPT Method for Obtaining Mechanical Properties of Ductile Materials and Its Application[J]. Journal of Mechanical Engineering, 2024, 60(4): 316-325.

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