Design of a novel high-speed tensile method for testing the high strain rate tensile behavior of aluminum alloys

被引：0

作者：

Chen, Li ^{[1
]}

Shi, Hao ^{[1
]}

Li, Weihao ^{[1
]}

Shi, Huantong ^{[1
]}

Li, Xingwen ^{[1
]}

Hao, Shiyu ^{[1
]}

Li, Chengcheng ^{[1
]}

An, Ran ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian 710024, Peoples R China

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2024年 / 95卷 / 12期

基金：

中国国家自然科学基金;

关键词：

STRESS WAVES; MODEL; BAR;

D O I：

10.1063/5.0235066

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The high-strain rate mechanical behavior of aluminum alloys is crucial for the stability of electromagnetic launch systems. However, current high-strain rate testing methods are not suitable for large-scale screening of materials needed in electromagnetic launch systems due to their low precision and high cost. In this paper, a novel method for high-strain rate tensile testing of aluminum alloys based on magnetic pulse driving was proposed. The method can generate a fast-rising edge and adjustable stress pulses to enable uniaxial tensile deformation, reaching a target strain rate quickly and keeping it constant. Based on the theory of stress wave transmission, a single-point method for measuring stress-strain relationship of the specimen combining digital image correlation (DIC) technology is proposed. Finite element simulations using the explicit finite element software LS-DYNA demonstrate a good agreement between the strains and strain rate with experimental values. Tensile tests were conducted on AA7075 in the strain rate range of 1000-3000 s(-1), the stress-strain relationship obtained from DIC agrees well with the results of traditional Hopkinson bar experiments.

引用

页数：11

共 29 条

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