工程科学学报2017,Vol.39Issue(1):31-38,8.DOI:10.13374/j.issn2095-9389.2017.01.004
初始温度条件下全尾胶结膏体损伤本构模型
Damage constitutive model of cemented tailing paste under initial temperature effect
摘要
Abstract
It is a universal phenomenon for all the mines that paste-filling material arrives at stope at different initial temperatures.The strength properties and stress-strain relation of paste at different initial temperatures have effect on the mining-filling cycle and the dilution of adjacent stope mining.A series of uniaxial compressive strength tests were performed on hardened paste with initial temperatures of 2,20,35 and 50 ℃ to obtain the stress-strain evolution curves at different initial temperatures.The damage constitutive models of paste at different initial temperatures were established on the basis of theoretical derivation and experimental results.A temperature-time coupling damage constitutive model was further proposed according to parameter regression of the established models.Finally,the temperature-time coupling damage constitutive model was embed into the solid mechanics module of Comsol software,which is for uniaxial compressive experiment simulation.The simulation results show good accordance with the experimental stressstrain curves,verifying the reliability of the proposed constitutive model.关键词
膏体/温度/应力-应变曲线/本构模型/数值模拟Key words
paste/temperature/stress-strain curves/constitutive models/numerical simulation分类
矿业与冶金引用本文复制引用
王勇,吴爱祥,王洪江,王贻明,崔亮,靳斐,周勃,沈家华..初始温度条件下全尾胶结膏体损伤本构模型[J].工程科学学报,2017,39(1):31-38,8.基金项目
北京市科委项目(Z161100001216002) (Z161100001216002)
国家自然科学基金资助项目(51574013,51374034,51674012) (51574013,51374034,51674012)
“十二五”国家科技支撑计划课题(2013BAB02B05) (2013BAB02B05)