한국해양공학회:학술대회논문집 (Proceedings of the Korea Committee for Ocean Resources and Engineering Conference)
- 한국해양공학회 2000년도 춘계학술대회 논문집
- /
- Pages.51-56
- /
- 2000
음향방출법에 의한 고강도 구조요 내화강의 열화특성에 관한 연구
A Study on Degradation Characteristic of High Strength Fire Resistance Steel for Frame Structure by Acoustic Emission
초록
Demand for new nondestructive evaluations is growing to detect tensile crack growth behavior to predict long term performance of materials and structure in aggressive environments, especially when they are in non-visible area. Acoustic emission technique is well suited to these problems and has drawn a keen interests because of its dynamic detection ability, extreme sensitivity and location of growing defects. In this study, we analysed acoustic emission signals obtained in tensile test of high strength fire resistance steel for frame structure with time frequency analysis methods. The results obtained are summaries as follows ; In the T and TN specimen consisting of ferrite and pearlite grains, most of acoustic emission events were produced near yield point, mainly due to the dislocation activities during the deformation. However, B specimen under
키워드