A study on mechanical behavior of the carbon fiber composite sandwich panel with pyramidal truss cores at different temperatures  

作　　者：LIU JiaYi ZHOU ZhenGong WU LinZhi MA Li 

机构地区：[1]Center for Composite Materials and Structures,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第11期2135-2142,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 90816024 and 11272105);the Major State Basic Research Development Program of China (Grant No. 2011CB610303);the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20092302110006)

摘　　要：A series of compression tests were conducted to investigate the mechanical properties and failure mechanisms of carbon fiber composite sandwich panels using pyramidal truss cores subjected to temperatures ranging from 100℃ to 350℃.The compressive strength and stiffness of sandwich panels decreased as temperature increased.Cryogenic temperatures caused an increase in strength and stiffness,while elevated temperatures resulted in a reduction of strength and stiffness.The effect of temperature on the failure mode of the sandwich panel was revealed as well.The interface between the fiber and matrix was examined by a scanning electron microscope(SEM) in order to study the effect of temperature on strengthening the mechanism and good bonding conditions within the fiber-matrix interface was observed at cryogenic temperatures.The comparison of the predicted and experimental data indicated that the stiffness and strength of the composite sandwich panels for temperature variation was consistent.A series of compression tests were conducted to investigate the mechanical properties and failure mechanisms of carbon fiber composite sandwich panels using pyramidal truss cores subjected to temperatures ranging from -100℃ to 350℃. The compressive strength and stiffness of sandwich panels decreased as temperature increased. Cryogenic temperatures caused an increase in strength and stiffness, while elevated temperatures resulted in a reduction of strength and stiffness. The effect of temperature on the failure mode of the sandwich panel was revealed as well. The interface between the fiber and matrix was examined by a scanning electron microscope （SEM） in order to study the effect of temperature on strengthening the mechanism and good bonding conditions within the fiber-matrix interface was observed at cryogenic temperatures. The comparison of the predicted and experimental data indicated that the stiffness and strength of the composite sandwich panels for temperature variation was consistent.

关 键 词：carbon fiber TEMPERATURE mechanical properties pyramidal truss 

分 类 号：TU972.9[建筑科学—建筑设计及理论] TB332[一般工业技术—材料科学与工程]