不同温度条件下相变石蜡力学性能分析
Analysis on Mechanical Properties of Phase Change Paraffin under Different Temperature Conditions
马令勇 1符恩民 1姜伟 2申若涵 1刘艳东 1李清 1刘功良 2郭巍2
作者信息
- 1. 东北石油大学土木建筑工程学院,黑龙江 大庆 163318;东北石油大学黑龙江省寒区新能源热利用及防灾减灾重点实验室,黑龙江 大庆 163318
- 2. 东北石油大学黑龙江省寒区新能源热利用及防灾减灾重点实验室,黑龙江 大庆 163318;黑龙江八一农垦大学土木水利学院,黑龙江 大庆 163319
- 折叠
摘要
对3种不同相变温度的石蜡材料(PCM-28、PCM-18 和PCM-10)在不同温度下的基本力学性能参数进行了系统的压缩实验,计算出对应的弹性模量和泊松比.结果表明:PCM-18 和PCM-10的抗压强度随温度的降低而有所提高,但PCM-28 的抗压强度随温度的降低反而呈现出下降趋势.在单轴压缩条件下PCM-28 和PCM-18的应力-应变曲线主要经历了压实阶段、弹性变形阶段、裂纹扩展阶段和裂纹后破坏阶段4个明显阶段,最终表现为脆性破坏.PCM-10 在经历压实阶段和弹性变形阶段后进入塑性阶段,曲线发展近似水平,且整个过程无明显裂纹出现.
Abstract
A systematic compression experiment was conducted to determine the basic mechanical property parameters of three different phase change paraffin materials(PCM-28,PCM-18,and PCM-10)at various temperatures.The corresponding elastic modulus and Poisson's ratio were calculated.The results revealed that the compressive strength of PCM-18 and PCM-10 increased with decreasing of temperature,while PCM-28 showed a decreasing trend in compressive strength with decreasing of temperature.Furthermore,under uniaxial compression conditions,PCM-28 and PCM-18 exhibited four distinct stages in their stress-strain curves:compaction stage,elastic deformation stage,crack propagation stage and post-crack failure stage,ultimately resulting in brittle failure.However,PCM-10 transitioned into the plastic stage after the compaction stage and elastic deformation stage,with the curve development approaching horizontal,and no significant cracks appeared throughout the process.
关键词
相变材料/石蜡/机械性能/弹性模量/泊松比/烷烃/测量/数值模拟Key words
Phase change materials/Paraffin wax/Mechanical properties/Elastic modulus/Poisson's ratio/Alkane/Measurement/Numerical simulation引用本文复制引用
基金项目
黑龙江省重点研发计划指导项目(GZ20220028)
黑龙江省自然科学基金项目(LH2021E022)
黑龙江八一农垦大学"三纵"科研支持计划项目(ZRCPY202225)
大庆市指导性科技计划项目(ZD-2023-58)
出版年
2024
NETL
NSTL
万方数据