U-cor增强泡沫夹层结构剪切性能  

Shear Behaviour of U-cor Reinforced Foam Sandwish Structure

作　　者：陈海立[1] 王佳佳[2] 周光明[3] 

机构地区：[1]南京机电液压工程研究中心航空机电系统综合航空科技重点实验室,南京211102 [2]中国船舶重工集团公司第716研究所,连云港222006 [3]南京航空航天大学机械结构强度与振动国家重点实验室,南京210016

出　　处：《材料导报（纳米与新材料专辑）》2016年第1期558-561,566,共5页

摘　　要：为了研究U-cor增强泡沫夹层结构的剪切性能,使用ABAQUS进行了有限元分析。基于三维渐进损伤分析方法,通过用户子程序编写了复合材料本构;基于细观几何结构,假设周期性条件并建立了单胞模型。通过分析得到U-cor的剪切强度和损伤过程,并进行试验验证。结果表明:无论是承受纬向剪切载荷还是经向剪切载荷,首先发生损伤的都是中间层泡沫;纬向剪切强度大于经向剪切强度;试验值与计算结果误差较小,证明了有限元模型是准确的。该研究成果可为U-cor的剪切强度预测提供可靠的仿真方法。In order to study the tension performance of U-cor reinforced foam sandwish structure,the software Abaqus was used for the Finite element analysis.The constitutive equations for composite was programmed simulate the damage progression by UMAT subroutine,though applying the three-dimensional progressive damage analysis（PDA）.The periodic boundary conditions was assumed and the cell model was set up based on the Geometric microstructure.The shear strength and damage progression were obtained though analysis,and the result was verified by experiment.The result showed：the parts damaged at first under warp-shear or weft-shear is middle-layer foam;the warp-shear strength is larger than the weft-shear strength;the theoretical prediction coincides with the experimental data well,proving the model was accurate.The research fruit was reliable to provide simulation method for the shear strength prediction of U-cor reinforced foam sandwish structure.

关 键 词：U-cor增强泡沫夹层结构 渐进损伤 粘聚区 单胞模型 剪切强度 

分 类 号：TB332[一般工业技术—材料科学与工程]