Research on the dynamic mechanical property and failure mechanism of glass fiber reinforced aerogel

Chin J Mater Res

2009, Vol. 23

Issue (5): 524-528 DOI:

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Research on the dynamic mechanical property and failure mechanism of glass fiber reinforced aerogel

YANG Jie; LI Shukui

School of Materials Science and Engineering; Beijing Institute of Technology; Beijing 100081

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YANG Jie LI Shukui. Research on the dynamic mechanical property and failure mechanism of glass fiber reinforced aerogel. Chin J Mater Res, 2009, 23(5): 524-528.

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Abstract

The dynamic mechanical property of glass fiber reinforced aerogel was investigated using a spilt Hopkinson pressure bar. Failure mechanism of aerogel was studied by scanning electron microscopy (SEM). The result showed that the quasi-static and dynamic stress-strain curves contained three regions: an elastic region, a yield region and a densification region. In the yield region, the compressive stress-strain curve showed plastic yield characteristics. The compressive behaviors of aerogel displayed a remarkable strain rate strengthening effect. Incident wave shaping using aerogel led to the decrease of stress on the incident bar and the increase of stress duration time on the incident bar. Under high strain rates, the glass fibers broke down and separated from matrix, and the pores shrank rapidly. Failure was due to the increase of axial compressive stress and lateral tensile stress under dynamic compression.

Key words: inorganic non-metallic materials glass fiber reinforced aerogel dynamic mechanical property micro-analysis failure mechanism

Received: 19 January 2009

ZTFLH:

TB321

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Supported by National Defence Pre−Research Foundtion of China No.151241.

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https://www.cjmr.org/EN/ OR https://www.cjmr.org/EN/Y2009/V23/I5/524

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