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5. PTFE膜材的应力松弛性能及预测模型研究

PTFE膜材的应力松弛性能及预测模型研究

来源 :第二届中国国际复合材料科技大会 (CCCM-2) | 被引量 : 0次 | 上传用户：lzayy9

【摘 要】

：

　　对建筑用PTFE(聚四氟乙烯)膜材进行了5种温度(23℃,40℃,50℃,60℃,70℃)下的单轴应力松弛试验,考虑了不同初始拉伸速度(5N/s,10N/s,20N/s)对于膜材应力松弛性能的影响,

【作 者】

：

许珊珊 张营营 张其林 

【机 构】

：

中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室

【出 处】

：

第二届中国国际复合材料科技大会 (CCCM-2)

【发表日期】

：

2015年期

【关键词】

：

PTFE膜材 应力松弛性能 预测 线性粘弹性模型 应力松弛试验 本构关系模型 Burgers模型 聚四氟乙烯 

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论文部分内容阅读

　　对建筑用PTFE(聚四氟乙烯)膜材进行了5种温度(23℃,40℃,50℃,60℃,70℃)下的单轴应力松弛试验,考虑了不同初始拉伸速度(5N/s,10N/s,20N/s)对于膜材应力松弛性能的影响,分析得到了材料的松弛模量变化规律,采用几种常见的粘弹性本构关系模型(经典线性粘弹性模型、广义线性粘弹性模型、分数阶模型、分指数模型和Burgers模型)对试验曲线进行了拟合对比分析。

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