| MICROMECHANICS ANALYSIS ON EVOLUTION OF CRACK IN VISCOELASTIC MATERIALS |
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| 作者姓名： | 张双寅 |
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| 作者单位： | ZHANG Shuang-yin (Institute of Mechanics，Chinese Academy of Sciences，Beijing 100080，P R China) (Communicated by SHENG Ya-pong) |
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| 基金项目： | theNationalNaturalScienceFoundationofChina( 1 9572 0 73 ) |
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| 摘 要： | ＩｎｔｒｏｄｕｃｔｉｏｎＡｓｓｈｏｗｎｂｙＺＨＡＮＧａｎｄＸＩＯＮＧ ( 1 997) 1],ｕｎｄｅｒｃｏｎｓｔａｎｔｌｏａｄｉｎｇｔｈｅｃｒａｃｋｉｎｖｉｓｃｏｅｌａｓｔｉｃｍａｔｅｒｉａｌｓｈａｓａｎｉｎｃｕｂａｔｉｏｎｔｉｍｅ ,ｗｉｔｈｉｎｉｔｔｈｅｃｒａｃｋｏｐｅｎｉｎｇｄｉｓｐｌａｃｅｍｅｎｔ (ＣＯＤ)ｉｓｃｈａｎｇｉｎｇｌａｒｇｅｒｗｉｔｈｔｉｍｅ,ｗｈｉｌｅｔｈｅｃｒａｃｋｌｅｎｇｔｈｋｅｅｐｓｃｏｎｓｔａｎｔ.Ｉｎｖｅｓｔｉｇａｔｉｏｎｏｎｔｈｅｇｒａｄｕａｌｏｐｅｎｉｎｇｏｆｔｈｅｃｒａｃ…
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| 收稿时间： | 27 July 2000 |
Micromechanics analysis on evolution of crack in viscoelastic materials |
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| Zhang Shuang-yin Professor.MICROMECHANICS ANALYSIS ON EVOLUTION OF CRACK IN VISCOELASTIC MATERIALS[J].Applied Mathematics and Mechanics(English Edition),2002,23(3):271-275. |
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| Authors: | Zhang Shuang-yin Professor |
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| Institution: | Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P R China |
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| Abstract: | A preliminary analysis on crack evolution in viscoelastic materials was presented. Based on the equivalent inclusion concept
of micro-mechanics theory, the explicit expressions of crack opening displacement δ and energy release rate G were derived,
indicating that both δ and G are increasing with time. The equivalent modulus of the viscoelastic solid comprising cracks
was evaluated. It is proved that the decrease of the modulus comes from two mechanisms: one is the viscoelasticity of the
material; the other is the crack opening which is getting larger with time.
Foundation item: the National Natural Science Foundation of China (19572073)
Biography: ZHANG Shuang-yin (1938-) |
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| Keywords: | viscoelasticity crack micromechanics |
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