• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Composite Materials >Creep behaviour of sandwich panels with rigid polyurethane foam core and glass-fibre reinforced polymer faces: Experimental tests and analytical modelling
【24h】

Creep behaviour of sandwich panels with rigid polyurethane foam core and glass-fibre reinforced polymer faces: Experimental tests and analytical modelling

机译：具有硬质聚氨酯泡沫芯和玻璃纤维增​​强聚合物面的夹芯板的蠕变行为：实验测试和分析模型

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents experimental and analytical investigations about the creep behaviour of sandwich panels comprising glass-fibre reinforced polymer faces and rigid polyurethane foam core for civil engineering applications. A full-scale sandwich panel was tested in bending for a period of 3600 h, in a simply supported configuration, subjected to a uniformly distributed load corresponding to 20% of the panel's flexural strength. Additionally, specimens of polyurethane foam core were tested in shear for a period of 1200 h, for three different load levels corresponding to 10%, 20% and 30% of the foam's shear strength. Experimental results were fitted using Findley's power law formulation. Creep coefficients, shear modulus reduction factors and time-dependent shear moduli were obtained for the polyurethane foam in shear. A composed creep model is proposed to simulate the sandwich panel's long-term creep deformations by considering the individual viscoelastic contributions from (1) the core material in shear and (2) the glass-fibre reinforced polymer faces in tension/compression. The composed creep model predictions adequately reproduced the full-scale panel's experimental results. In addition, a good agreement was found between the composed creep model predictions and the extrapolation of the power law fitting obtained from the full-scale panel test, for a 50-year period.
机译：本文介绍了用于土木工程的夹芯板的蠕变行为的实验和分析研究，该夹芯板包括玻璃纤维增​​强的聚合物面和硬质聚氨酯泡沫芯。在简单支撑的结构中，对全尺寸夹心板进行了3600小时的弯曲测试，承受的载荷是均匀分布的载荷，相当于板抗弯强度的20％。另外，对聚氨酯泡沫芯的样品进行了1200 h的剪切测试，测试了三种不同的载荷水平，分别对应于泡沫剪切强度的10％，20％和30％。使用Findley的幂定律公式拟合了实验结果。获得了聚氨酯泡沫在剪切中的蠕变系数，剪切模量降低因子和随时间变化的剪切模量。通过考虑（1）剪切时的芯材和（2）拉伸/压缩时的玻璃纤维增​​强聚合物面各自的粘弹性贡献，提出了一种组合蠕变模型来模拟夹芯板的长期蠕变变形。合成的蠕变模型预测充分地再现了全尺寸面板的实验结果。此外，在组成的蠕变模型预测与从满量程面板测试获得的幂律拟合的外推之间，找到了一个很好的协议，为期50年。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号