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不同温度条件下相变石蜡力学性能分析

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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.
Analysis on Mechanical Properties of Phase Change Paraffin under Different Temperature Conditions
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.

Phase change materialsParaffin waxMechanical propertiesElastic modulusPoisson's ratioAlkaneMeasurementNumerical simulation

马令勇、符恩民、姜伟、申若涵、刘艳东、李清、刘功良、郭巍

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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

黑龙江八一农垦大学土木水利学院,黑龙江 大庆 163319

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

黑龙江省重点研发计划指导项目黑龙江省自然科学基金项目黑龙江八一农垦大学"三纵"科研支持计划项目大庆市指导性科技计划项目

GZ20220028LH2021E022ZRCPY202225ZD-2023-58

2024

当代化工
中国石油抚顺石化公司,中国石化抚顺石油化工研究院,沈阳市医药和化工行业联合会

当代化工

CSTPCD
影响因子：0.412
ISSN：1671-0460
年,卷(期)：2024.53(8)