-
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。Abstract: Basedona50-mm-diametersplitHopkinsonpressurebar(SHPB)systemandaself-developedconcrete- likematerialrapidheatingdevice,impactcompressiveexperimentswerecarriedout. Thestress-straincurvesatdifferenttemperatureandthreekindsofimpactvelocitieswereobtained. BasedontheZWTvisco-elasticconstitutivemodelanddamageevolutionofcementmortarfollowing Weibulldistribution,thedamagethermo-viscoelasticconstitutiveequationathighstrainrateswas proposed.Throughthenumericalfitting,theparametersoftheconstitutiveequationwereobtained. Comparisonsshowthatthemodelpredictionsagreewellwiththeexperimentresults.
-
Key words:
- solid mechanics /
- constitutiveequation /
- SHPB /
- cementmortar /
- temperature /
- damage /
- viscoelastic
点击查看大图
计量
- 文章访问数: 2407
- HTML全文浏览量: 86
- PDF下载量: 315
- 被引次数: 0