Servohydraulic methods for mechanical testing in the Sub-Hopkinson rate regime up to strain rates of 500 1/s. | |
Crenshaw, Thomas B. ; Boyce, Brad Lee | |
Sandia National Laboratories | |
关键词: Compression; Alloys; Strain Rate; Strain Rate-Testing.; 36 Materials Science; | |
DOI : 10.2172/875626 RP-ID : SAND2005-5678 RP-ID : AC04-94AL85000 RP-ID : 875626 |
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美国|英语 | |
来源: UNT Digital Library | |
【 摘 要 】
Tensile and compressive stress-strain experiments on metals at strain rates in the range of 1-1000 1/s are relevant to many applications such as gravity-dropped munitions and airplane accidents. While conventional test methods cover strain rates up to {approx}10 s{sup -1} and split-Hopkinson and other techniques cover strain rates in excess of {approx}1000 s{sup -1}, there are no well defined techniques for the intermediate or ''Sub-Hopkinson'' strain-rate regime. The current work outlines many of the challenges in testing in the Sub-Hopkinson regime, and establishes methods for addressing these challenges. The resulting technique for obtaining intermediate rate stress-strain data is demonstrated in tension on a high-strength, high-toughness steel alloy (Hytuf) that could be a candidate alloy for earth penetrating munitions and in compression on a Au-Cu braze alloy.
【 预 览 】
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875626.pdf | 440KB | download |