以多亚甲基多苯基异氰酸酯(PAPI)、聚醚多元醇、1,4-丁二醇、三丙醇胺、溶剂油和水为原料,通过探讨不同因素对材料膨胀压、弹性模量和黏度等性能的影响,制备出无砟轨道路基翻浆冒泥整治用PU(聚氨酯)灌浆材料。研究结果表明:当w(水)=0.6%...以多亚甲基多苯基异氰酸酯(PAPI)、聚醚多元醇、1,4-丁二醇、三丙醇胺、溶剂油和水为原料,通过探讨不同因素对材料膨胀压、弹性模量和黏度等性能的影响,制备出无砟轨道路基翻浆冒泥整治用PU(聚氨酯)灌浆材料。研究结果表明:当w(水)=0.6%、w(1,4-丁二醇)=10%、w(三丙醇胺)=15%和w(溶剂油M)=8%(均相对于多元醇和交联剂总质量而言)时,灌浆材料在发泡膨胀后的弹性模量超过200 MPa、黏度低于300 m Pa·s,可用于无砟轨道路基翻浆冒泥的灌浆整治。展开更多
The relationship between the protective performance of flexible polymer material and material parameters(elasticmodulus,viscosity coefficient)is explored,an impact collision motion equation between two bodies is estab...The relationship between the protective performance of flexible polymer material and material parameters(elasticmodulus,viscosity coefficient)is explored,an impact collision motion equation between two bodies is establishedfrom the viscoelastic material constitutive,and the relationship between the kinematic response and the materialparameters is obtained.Based on the Kelvin constitutive model,a theoretical model for impact between the pro-tective body and the protected body is established,then the dynamic response is obtained.The feasibility of themodel was verified by drop hammer experiment,and the material parameters(elastic modulus,viscosity coeffi-cient)were obtained by formula.The model is discretized and the relationship between local impact response andmaterial parameters is analyzed.The discussion results on the relationship between the impact response and theprotective material performance indicate that adjusting the elastic modulus,viscosity coefficient,and thicknessof the protective material can effectively improve protective effect.展开更多
文摘以多亚甲基多苯基异氰酸酯(PAPI)、聚醚多元醇、1,4-丁二醇、三丙醇胺、溶剂油和水为原料,通过探讨不同因素对材料膨胀压、弹性模量和黏度等性能的影响,制备出无砟轨道路基翻浆冒泥整治用PU(聚氨酯)灌浆材料。研究结果表明:当w(水)=0.6%、w(1,4-丁二醇)=10%、w(三丙醇胺)=15%和w(溶剂油M)=8%(均相对于多元醇和交联剂总质量而言)时,灌浆材料在发泡膨胀后的弹性模量超过200 MPa、黏度低于300 m Pa·s,可用于无砟轨道路基翻浆冒泥的灌浆整治。
基金supported by the National Natural Science Foundation of China(Grant Nos.12172151 and 12172149).
文摘The relationship between the protective performance of flexible polymer material and material parameters(elasticmodulus,viscosity coefficient)is explored,an impact collision motion equation between two bodies is establishedfrom the viscoelastic material constitutive,and the relationship between the kinematic response and the materialparameters is obtained.Based on the Kelvin constitutive model,a theoretical model for impact between the pro-tective body and the protected body is established,then the dynamic response is obtained.The feasibility of themodel was verified by drop hammer experiment,and the material parameters(elastic modulus,viscosity coeffi-cient)were obtained by formula.The model is discretized and the relationship between local impact response andmaterial parameters is analyzed.The discussion results on the relationship between the impact response and theprotective material performance indicate that adjusting the elastic modulus,viscosity coefficient,and thicknessof the protective material can effectively improve protective effect.
