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| Mechanic behaviors of the thermoviscoelastic matrix composites with shape memory fiber |
| HE Weibo; JIN Ming; ZHAO Yongli |
| School of Civil Engineering and Architecture; Beijing Jiaotong University; Beijing 100044 |
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Cite this article:
HE Weibo JIN Ming ZHAO Yongli. Mechanic behaviors of the thermoviscoelastic matrix composites with shape memory fiber. Chin J Mater Res, 2009, 23(1): 17-21.
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Abstract A stress-strain relation of the thermoviscoelastic matrix composites with pre-strained NiTi fiber is proposed in the field of variable temperature based on the thermoviscoelasticity theory and the rule of mixtures, and in view of the process of martensite reverse transformation. During the reverse transformation and the thermoviscoelastic state of matrix, due to matrix relaxation modulus decreasing,the results show that upon the step constant stress, the compression strain of the composites increases rapidly, and the recovery stress of the NiTi fiber increases then decreases; Under the step constant strain, the increase of the composites stress become slow then fast, till steady. The behaviors of the composites, and the NiTi fiber actuation performance are influenced by higher temperature as well as the material parameters.
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Received: 22 April 2008
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| Fund: Supported by National Natural Science Foundation of China No.90205007. |
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