중변형률 속도 유동응력 확보를 위한 고속 인장 실험기 설계 (Design of High Speed Tensile Test Machine for Flow Stress under Intermediate Strain Rate Condition)

서지정보

· 발행기관 : 한국해양공학회
· 수록지 정보 : 한국해양공학회지 / 29권 / 1호 / 34 ~ 44페이지
· 저자명 : 정준모, 윤성원, 박성주, 김영훈

초록

A hydraulic tensile test machine (HSTM) is one of the devices used to obtain the flow stress of a material during high-speedelongation. This paper first describes some features of a newly built HSTM. The improvement histories of the upper and lower jigs, which are themost vital parts of the HSTM, are also presented. We have frequently witnessed test failures with 1st generation jigs and specimens due to slipbetween the jig and specimen. 2nd generation jigs provide more stable test results, but the use of a longer upper jig induces excessive vibrationand consequently makes it difficult to attach an environment chamber. 3rd generation jigs have some advances in terms of the symmetric fasteningbetween the upper jig and specimen, as well as an exemption from direct contact between the lower jig and specimen. The performance of anenvironment chamber is verified by high and low temperature tests. A high-speed displacement measurement system is introduced based on ahigh-speed camera and motion-tracking software with aid of a surface grid device for the specimen.

영어초록

A hydraulic tensile test machine (HSTM) is one of the devices used to obtain the flow stress of a material during high-speedelongation. This paper first describes some features of a newly built HSTM. The improvement histories of the upper and lower jigs, which are themost vital parts of the HSTM, are also presented. We have frequently witnessed test failures with 1st generation jigs and specimens due to slipbetween the jig and specimen. 2nd generation jigs provide more stable test results, but the use of a longer upper jig induces excessive vibrationand consequently makes it difficult to attach an environment chamber. 3rd generation jigs have some advances in terms of the symmetric fasteningbetween the upper jig and specimen, as well as an exemption from direct contact between the lower jig and specimen. The performance of anenvironment chamber is verified by high and low temperature tests. A high-speed displacement measurement system is introduced based on ahigh-speed camera and motion-tracking software with aid of a surface grid device for the specimen.

참고자료

· 없음