Open Access

ARTICLE

Control Effect of Fatigue Crack Propagation in the TiNi Fiber Reinforced Smart Composite

A. Shimamoto¹, C. C. Lee², Y. Furuya³

1 Saitama Institute of Technology, JAPAN
2 Sumita Optical Glass Inc., JAPAN
3 Department of Intelligent Machines and System Engineering, Hirosaki University, JAPAN

Structural Longevity 2012, 8(2), 71-81. https://doi.org/10.3970/sl.2012.008.071

Abstract

The TiNi fiber reinforced / PC composite material was developed, and shape memory effect, which would prevent fatigue crack growth, of the material was investigated through fatigue experiments. The fatigue behavior and crack propagation were observed under various temperature in the SEM servopulser, which is a fatigue testing instrument with scanning electron microscope. The results showed the effectiveness of fatigue resistance. The shape memory effect and expansion behavior of the matrix caused by increasing temperature created the fatigue crack propagation control mechanism. It was verified that the controlling of fatigue crack growth was attributed to the compressive stress field in the matrix which was caused by shrinkage of the TiNi fiber above austenitic finishing temperature (A_f).

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Keywords

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