对PVB和SG层间材料的动态反应进行热粘弹性材料模型的校准
Jon Knight1, Hani Salim1, Hesham Elemam1
1Civil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USA.
Polymers
|July 13, 2024
概括
这项研究对聚乙烯 (PVB) 和SentryGlas® (SG) 间层材料的材料模型进行校准,改善了层状玻璃的动态响应预测. 三网粘性塑料 (TNV) 模型准确地捕捉了热量和延展率的影响.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 聚合物科学 聚合物科学
背景情况:
- 层状玻璃中间层,如聚乙 (PVB) 和SentryGlas® (SG),表现出复杂的热粘弹性行为.
- 由于这些间层的温度和拉伸率敏感性,精确地建模层状玻璃动态是具有挑战性的.
- 现有的模型 (双线模型,超弹性模型) 往往过度简化了层间的行为,忽视了关键的热和速度依赖的效应.
研究的目的:
- 为PVB和SG介层材料的热粘弹性动态反应校准材料模型.
- 为了提高在动态负载条件下预测层状玻璃行为的准确性.
- 为热塑性介层建立标准化校准程序的基础.
主要方法:
- 对PVB和SG进行了不同拉伸速率 (2,20,45s-1) 和温度 (0,23,60°C) 的单轴拉伸试验.
- 利用三网粘性塑料 (TNV) 模型捕捉观察到的热和应变率依赖的粘性弹性行为.
- 校准了TNV材料模型,使用从拉伸试验中获得的实验数据.
主要成果:
- 使用校准的TNV模型进行有限元分析,准确预测了PVB和SG的动态反应.
- 在经过测试的实验条件下,在10%的误差范围内实现预测.
- 证明了TNV模型在更简单的介层行为近似方法上的优越性能.
结论:
- 校准的TNV模型为模拟层状玻璃的动态反应提供了显著的改进.
- 开发的方法提供了一个更准确的方法来模拟PVB和SG介层的行为.
- 该研究为适用于其他热塑性材料的标准化校准指南奠定了基础.
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