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总览 评价 尹征南 * ( 上海大学 上海市应用数学和力学研究所; ) 摘要: 银纹化是颗粒改性高分子材料提高韧性的主要形式。本文通过构造轴对称代表体积单元,采用细观力学方法研究了高分子合金的银纹化过程。计算过程采用新的银纹条分布方式,并结合材料实
尹征南*
(
上海大学 上海市应用数学和力学研究所; )
摘要:
银纹化是颗粒改性高分子材料提高韧性的主要形式。本文通过构造轴对称代表体积单元,采用细观力学方法研究了高分子合金的银纹化过程。计算过程采用新的银纹条分布方式,并结合材料实验变形曲线,构造出了合理的计算模型。通过计算得到的真应力-真应变曲线和银纹化过程最大主应力矢量图,验证了所提出模型的合理性。进一步,利用该模型讨论相关因素对高分子合金银纹化过程的影响。
关键词:
聚合物;银纹化;细观力学;轴对称
YIN Zhengnan*
(
Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University,Shanghai 200072, China; )
Abstract:
Craze is an important method for toughening in particle modified polymer. Constructing axisymmetric representative volume element (RVE), this paper adopts micromechanical method to study crazing procedure in polymer alloy. New arrangement of craze strip and constitutive model based on material test result were used to present the computational model. Rationality of this model was verified through calculated real strss-real strain curves and vector diapram of maximul principal stress in craze strip. Furthermore, the influence of particle shape and arrangment on carze procedure was discussed in detals.
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