| 水泥砂浆的一个热粘弹性率型损伤本构模型 |
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| 引用本文： | 陶俊林,李奎.水泥砂浆的一个热粘弹性率型损伤本构模型[J].爆炸与冲击,2011,31(3):268-273. |
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| 作者姓名： | 陶俊林 李奎 |
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| 作者单位： | 西南科技大学土木工程与建筑学院,四川绵阳,621010;西南科技大学土木工程与建筑学院,四川绵阳,621010 |
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| 基金项目： | 国家自然科学基金项目(10602048,10972187)~~ |
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| 摘 要： | 利用SHPB实验系统及自行研制的混凝土类材料快速高温加热设备,对水泥砂浆试件进行了不同 温度(20~600℃)和3种冲击速度下的实验,得到了不同温度和冲击速度下水泥砂浆试件的应力应变关系曲 线。基于ZWT粘弹性本构模型,并且考虑高温下水泥砂浆损伤演化规律都服从Weibull分布,提出了一个水 泥砂浆的热粘弹性率型损伤本构模型。通过数据拟合,获得了本构模型的相关参数,结果表明:理论预测和实 验结果吻合良好。
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| 关 键 词： | 固体力学 本构模型 SHPB 水泥砂浆 温度 损伤 粘弹性 |
A thermo-viscoelastic rate-dependent constitutive equation for cement mortar with damage |
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| TAO Jun-lin,LI Kui.A thermo-viscoelastic rate-dependent constitutive equation for cement mortar with damage[J].Explosion and Shock Waves,2011,31(3):268-273. |
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| Authors: | TAO Jun-lin LI Kui |
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| Institution: | 1.CollegeofCivilEngineeringandArchitecture,SouthwestUniversityofScience |
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| Abstract: | Based on a 50-mm-diameter split Hopkinson pressure bar(SHPB) system and a self-developed concrete-like material rapid heating device,impact compressive experiments were carried out.The stress-strain curves at different temperature and three kinds of impact velocities were obtained.Based on the ZWT visco-elastic constitutive model and damage evolution of cement mortar following Weibull distribution,the damage thermo-viscoelastic constitutive equation at high strain rates was proposed.Through the numerical fi... |
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| Keywords: | solid mechanics constitutive equation SHPB cement mortar temperature damage viscoelastic |
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