结构工程用形状记忆合金的机械性能和构成模型:一篇综述
Ali Mohammadgholipour1, Ahm Muntasir Billah1
1Department of Civil Engineering, University of Calgary, Calgary, AB, Canada.
概括
形状记忆合金 (SMA) 具有独特的超弹性和能量消耗,这对于结构工程至关重要. 本综述突出了对于理解SMA钢筋在地震应用的循环张力压缩负荷下表现的差距.
科学领域:
- 材料科学与工程 材料科学与工程
- 土木工程 土木工程是指土木工程.
- 结构工程 结构工程
背景情况:
- 形状记忆合金 (SMA) 具有超弹性和能耗,使其成为结构应用的前景.
- 在有限元 (FE) 分析中精确建模SMA需要了解它们的机械特性和周期性行为.
- 现有的研究主要集中在拉力负荷上,忽视了对地震弹性至关重要的拉力压缩行为.
研究的目的:
- 识别和讨论有关SMA铁杆低循环疲劳 (LCF) 行为的当前文献空白.
- 提供SMA特征,机械性能和影响参数的全面概述.
- 批判性地评估周期性和LCF对SMA的影响,并比较FE分析的组成模型.
主要方法:
- 关于形状记忆合金现有研究的文献综述.
- 在不同负荷下分析机械性能和周期性行为.
- 在FE软件中评估SMA行为预测的构成模型.
主要成果:
- 确定了在循环张力压缩负载下了解SMA钢筋行为方面的重大差距.
- 总结了影响SMA表现的关键机械特性和因素.
- 对比了各种组成模型,突出了它们在FE应用中的优缺点.
结论:
- 需要进一步研究SMA钢筋在抗震应用的张力压缩负载下低周期疲劳行为.
- 对于SMA属性和验证的构成模型的彻底理解对于其在土木工程中的有效实施至关重要.
- 本综述为在结构设计中准确预测SMA行为提供了选择合适模型的基础.
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