Stresses during thermoset cure
Stresses during thermoset cure
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热固性固化过程中的应力
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
T. Guess
中科院分区：
文献类型：
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作者：
D. Adolf;James E. Martin;R. Chambers;S. Burchett;T. Guess
由于环氧树脂固化过程中产生的过度应力导致的生产问题使我们开发了一种形式来预测这些应力。在我们的第一个研究中，我们开发了一个基本的理解的复杂演变的粘弹性的治疗进展。然后，我们将这些结果纳入一个适当的张量本构方程，集成到我们的有限元代码，并验证使用更复杂的几何形状，热历史，和应变分布。然后将该形式应用于原始生产问题，以确定固化时间表，从而最大限度地减少固化过程中的应力产生。在进行这些活动的过程中，发现了一些有趣和令人困惑的现象，这些现象激发了进一步的研究。
Production problems attributed to excessive stresses generated during the cure of epoxies led us to develop a formalism to predict these stresses. In our first studies, we developed a fundamental understanding of the complex evolution of viscoelasticity as the cure progresses. We then incorporated these results into a proper tensorial constitutive equation that was integrated into our finite element codes and validated using more complicated geometries, thermal histories, and strain profiles. The formalism was then applied to the original production problem to determine cure schedules that would minimize stress generation during cure. During the pursuit of these activities, several interesting and puzzling phenomena were discovered that have stimulated further investigation.