多年冻土和季节性冻土属于不良工程地质条件，其物理特性、力学和热学性能决定了冻胀和融沉工程病害对线路基础稳定性的影响程度。
The permafrost or seasonal frozen soils are undesirable engineering geologic condition and the frost heave and thawing settlement will influence the stability of foundations.
本文分析了异种材料固相连接接头热应力形成特点及其影响因素，指出材料的力学和热学性能与接头几何的匹配是异种材料固相连接热应力缓和设计的基础。
It is pointed that the matching of material properties and joint geometry is fundamental to the thermal stresses relaxation in the design of joints of dissimilar materials.
研究了马来酸酐接枝天然橡胶(MNR)作为改性剂，对废报纸粉(PF)填充聚氯乙烯(PVC)复合材料的力学性能和热学性能的影响。
Maleic anhydride grafted natural rubber (MNR) was used as modifier, and its effect on the mechanical properties and thermal property of waste newspaper flour (PF) filled PVC composites was studied.
应用推荐