华中科技大学学报（自然科学版）2025，Vol.53Issue(2)：136-141,149,7.DOI:10.13245/j.hust.250628
温度对喷涂聚脲弹性体静动态压缩力学性能影响试验研究
Experimental study on the influence of temperature on static and dynamic on compressive mechanical properties of sprayed polyurea elastomer
摘要
Abstract
In order to explore the effect of temperature on the static and dynamic compressive mechanical properties of polyurea,21 groups of compressive mechanical properties tests of polyurea materials at low,medium and high strain rates were carried out based on the three temperature environments of room temperature in winter,50℃and 80℃.It is found by analyzing the mechanical parameters of polyurea at different temperature and strain rate that polyurea would show strain rate effect and strain hysteresis effect when subjected to dynamic force.The dynamic force could increase the strength of polyurea,but reduce its plasticity.Polyurea also shows temperature effect and strain hysteresis effect under the influence of temperature.Heating environment will reduce strength but increase plasticity of polyuria.And the temperature will change the law of dynamic stress development of polyurea.As the temperature increases,the development trend of the dynamic curve hardening section of polyurea will change from downward to upward.Polyurea has time temperature equivalence,and increasing observation time or temperature will result in similar changes in its properties.The strain rate effect has a greater effect on the change in elasticity of polyurea than that in strength.However,the temperature effect has a more obvious effect on the change in strength of polyurea than that in elasticity.The decreasing hardening characteristics can effectively protect polyurea from the external high strain rate force,and the plastic changes caused by high temperature can effectively alleviate the secondary damage of fragments.关键词
聚脲弹性体/霍普金森杆/力学性能/应变率效应/温度效应Key words
polyurea elastomer/Hopkinson bar/mechanical properties/strain rate effect/temperature effect分类
数理科学引用本文复制引用
闫秋实,蒋裕丹,李述涛,田栓柱..温度对喷涂聚脲弹性体静动态压缩力学性能影响试验研究[J].华中科技大学学报（自然科学版）,2025,53(2):136-141,149,7.基金项目
国家自然科学基金资助项目(52178445). （52178445）
