Buckling behavior of micro metal wire on polymer membrane under combined effect of electrical loading and mechanical loading
(1. Hybrid Materials Unit, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;
2. Key Laboratory of Applied Mechanics, Ministry of Education, School of Aerospace Engineering,
Tsinghua University, Beijing 100084, China;
3. School of Civil Engineering and Architecture, University of Ji’nan, Ji’nan 250022, China)
2. Key Laboratory of Applied Mechanics, Ministry of Education, School of Aerospace Engineering,
Tsinghua University, Beijing 100084, China;
3. School of Civil Engineering and Architecture, University of Ji’nan, Ji’nan 250022, China)
Abstract: The buckling behavior of a typical structure consisting of a micro constantan wire and a polymer membrane under coupled electrical-mechanical loading was studied. The phenomenon that the constantan wire delaminates from the polymer membrane was observed after unloading. The interfacial toughness of the constantan wire and the polymer membrane was estimated. Moreover, several new instability modes of the constantan wire could be further triggered based on the buckle-driven delamination. After electrical loading and tensile loading, the constantan wire was likely to fracture based on buckling. After electrical loading and compressive loading, the constantan wire was easily folded at the top of the buckling region. On the occasion, the constantan wire buckled towards the inside of the polymer membrane under electrical-compressive loading. The mechanisms of these instability modes were analyzed.
Key words: delamination; instability modes; electrical loading; mechanical loading; interfacial toughness