基于有限元的建筑高分子材料热稳定性效果分析  

Thermal Stability Analysis of Building Polymer Materials Based on Finite Element Method

作　　者：安昶[1] 孟小丽[1] AN Chang;MENG Xiao-li(Xinjiang Agricultural Vocational and Technical College,Changji 831100,Xinjiang,China)

机构地区：[1]新疆农业职业技术学院,新疆昌吉831100

出　　处：《合成材料老化与应用》2020年第6期103-106,75,共5页Synthetic Materials Aging and Application

摘　　要：为验证受热状况下建筑高分子材料的稳定性能,提出基于有限元的建筑高分子材料热稳定性效果分析方法。选取树脂混凝土材料为所分析的建筑高分子材料,通过三维热力学模型结合有限元软件实现通过广义Maxwell模型模拟树脂混凝土试件热力学行为的目的。测试实验结果表明,在不同电流作用下,树脂混凝土试件的热应力随电流升高而增长,且变化趋势相似,说明该试件具有显著的热膨胀阻碍效果,热应力性能较为稳定;在同一升温环境中达到同等应变时该试件的纤维体积含量越高所产生的内应力越高,同时纤维体积含量与等效拉伸模量成正比,在升温过程中纤维体积含量越高的试件其等效拉伸模量下降趋势越轻微,说明该试件的热稳定性效果直接受其纤维体积含量的影响,二者为正比关系。In order to verify the thermal stability of building polymer materials under thermal conditions,a finite element method was proposed to analyze the thermal stability of building polymer materials.Taking resin concrete material as the analyzed building polymer material,the thermodynamic behavior of resin concrete specimens was simulated by using generalized Maxwell model through three-dimensional thermodynamic model and finite element software.The test results show that the thermal stress of the resin concrete specimen increases with the increase of the current under the action of diff erent electric currents,and the variation trend is similar,indicating that the specimen has a significant thermal expansion blocking eff ect and a relatively stable thermal stress performance.At the same temperature environment to achieve the same strain,the higher fiber volume content of the specimen,the higher generated internal stress,and at the same time fiber volume content is proportional to the equivalent tensile modulus,the higher the fiber volume content in the process of heating up,the tensile modulus of the equivalent decline slightly more,showing that the thermal stability of the specimens eff ect is directly aff ected by the fiber volume content,both for the proportional relationship.

关 键 词：有限元 建筑 高分子材料 热稳定性 树脂混凝土 热力学模型 

分 类 号：TB332[一般工业技术—材料科学与工程]