| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.246 |
| 발표분야 | 복합재료 |
| 제목 | Nondestructive Sensing Evaluation of Single-SMA Fiber/Epoxy Composites using Electrical Resistance Measurement |
| 초록 | Shape memory alloy (SMA) fiber can be used for many applications, such as a damage and curing monitoring sensor due to its inherent shape recovery properties: i.e., shape memory effect (SME) is the recovery properties with increasing temperature or applying stress. Super-elasticity behavior was observed under continuous stress-strain curve. Under a certain stress, modulus was reduced steepy and then recovered original modulus under further stress. With increasing temperature or applying stress, SMA is well known to be changed from martensite to austenite structure. Possible nondestructive sensing and recovery residual stress of single-SMA fiber reinforced epoxy composites were investigated using micromechanical test and electrical resistance measurement. Sudden change in electrical resistance was observed at 87 ℃ with increasing temperature. Under cyclic loading stress was suddenly released at certain stress-strain level for a while and then decreased up to a certain stress-strain level again repeatedly. Cure monitoring using SMA fiber will be studied continuously. Acknowledgement: This study was supported by KoSEF through ReCAPT, GNU. Fig. 1 The change in ER of SMA with cyclic loading Fig. 2 The change in ER of SMA with temp. References 1. H. A. Bruck and B. H. Rabin, Journal of Materials Science, 34, 2241 (1991). 2. J. E. Bidaux, J. A. E. Manson, R. Gotthardt, Mat. Res. Soc. (MRS) Symp. Proc., 459, 107 (1997). |
| 저자 | 김평기1, 박종만2, 이상일1 |
| 소속 | 1경상대, 2항공기부품기술연구센터 |
| 키워드 | Shape memory alloy (SMA); curing monitoring; micromechanical techniques; electrical resistance |
