| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.213 |
| 발표분야 | 복합재료 |
| 제목 | Interfacial Sensing and Nondestructive Evaluation of Single-SMA Fiber/Epoxy Composites Using Electro-Micromechanical Technique |
| 초록 | SMA (Shape memory alloy) is well known to be changed from martensite to austenite structure with increasing temperature or applying stress. Possible nondestructive sensing and recovery residual stress of single-SMA fiber reinforced epoxy composites were investigated using micromechanical test and electrical resistance measurement. 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. Sudden change in electrical resistance was observed at 87˚C with increasing temperature (Fig. 1). Under cyclic loading stress was suddenly released at certain stress-strain level for a while and then decreased down to a certain stress-strain level again repeatedly (Fig. 2). Cure monitoring using SMA fiber was studied continuously. Acknowledgement: this work was financially supported by Korea Research Foundation Grant (KRF-2004-002-D00192). Fig. 1 The change in ER of SMA with temperature Fig. 2 Stress-strain curve of SMA under 5 uniform cyclic loading References 1 J. M. Park, J. W. Kong, D. S. Kim, D. J. Yoon, Composites Science And Technology, 65, 214-256 (2005). 2 Y. J. Zheng, L. S. Cui, J. Shrooten, Materials Science and Engineering A, 390, 139 (2005). |
| 저자 | 트란콩손1, 정진규2, 이상일1, 박종만2 |
| 소속 | 1경상대, 2공학(연) |
| 키워드 | Shape memory alloy (SMA); Cure monitoring; Micro-mechanical techniques; Electrical resistance |
