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visco-elasticity of polymers
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visco-elasticity of polymers
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理学
高聚物粘弹性
释
visco-elasticity of polymers
高聚物黏弹性
高聚物材料的力学行为既具有弹性又具有黏性。理想的弹性固体服从胡克定律,即在应变很小时,应变正比于应力,,比例常数是固体的模量,其倒数为柔量。理想的黏性液体服从牛顿定律,应力正比于应变速率,,式中为液体的黏度;为时间。
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