Improved Kolsky tension bar for high-rate tensile characterization of materials

被引：21

作者：

Song, Bo ^{[1
]}

Antoun, Bonnie R. ^{[1
]}

Connelly, Kevin ^{[1
]}

Korellis, John ^{[1
]}

Lu, Wei-Yang ^{[1
]}

机构：

[1] Sandia Natl Labs, Livermore, CA 94551 USA

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2011年 / 22卷 / 04期

基金：

美国能源部;

关键词：

Kolsky tension bar; stress wave; dynamic tensile characterization; stress-strain response; HOPKINSON PRESSURE BAR; PULSE SHAPING TECHNIQUES; STRAIN; COMPRESSION;

D O I：

10.1088/0957-0233/22/4/045704

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new Kolsky tension bar has been re-designed and developed at Sandia National Laboratories, CA. The new design uses the concept that a solid striker is fired to impact an end cap attached to the open end of the gun barrel to generate dynamic tensile loading. The gun barrel here serves as part of the loading device. The incident bar that is connected to the gun barrel and the transmission bar follow the design similar to the Kolsky compression bar. The bar supporting and aligning systems are the same as those in the Kolsky compression bar design described by Song et al (2009 Meas. Sci. Technol. 20 115701). Due to the connection complication among the gun barrel, bars and specimen, stress-wave propagation in the new Kolsky tension bar system is comprehensively analyzed. Based on the stress-wave analysis, the strain gage location on the incident bar needs to be carefully determined. A highly precise laser-beam measurement system is recommended to directly measure the displacement of the incident bar end. Dynamic tensile characterization of a 4330-V steel using this new Kolsky tension bar is presented as an example.

引用

页数：7

共 19 条

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