摘要
为了更加精确地计算风电叶片厚胶层胶接接头的极限承载能力,给出了一种基于虚拟裂纹闭合技术的胶接接头有限元建模方法,研究了粘接胶厚度和铺层结构弯曲刚度对胶接双悬臂梁极限承载能力的影响。首先,给出了基于虚拟裂纹闭合技术的胶接接头极限载荷计算的有限元建模方法;然后,建立了胶接双悬臂梁试验件的有限元模型,并预测了剥离载荷作用下的极限承载能力;最后,基于胶接双悬臂梁的有限元模型,计算了不同粘接胶厚度和铺层刚度下的双悬臂梁极限承载能力。研究结果表明:胶接接头开裂行为可以采用虚拟裂纹闭合法进行模拟,模拟结果与试验结果吻合良好;随着粘接胶厚度的增加,胶接结构承载能力增加;随着铺层结构弯曲刚度的增加,胶接结构极限承载能力增加;基于虚拟裂纹闭合法的胶接接头建模方法,可以用于风电叶片厚胶层胶接接头的失效模拟。
In order to get a more accurate method for predicting the ultimate load for thick bond joint in wind turbine blade,a modeling method for bond joint using the finite element method based on virtual crack closure technique(VCCT)is presented,and the effect of adhesive thickness and adherends bending stiffness on the ultimate load of the bonded double cantilever beam(DCB)is analyzed.First,the modeling method of bonded DCB is described.Then,the finite element model of test coupon is established,and the ultimate load is predicted.Finally,the ultimate load for different bond thickness and adherent bending stiffness is calculated.It is found that the simulation ultimate load is in good agreement with the experimental result.VCCT can then be used to predict the ultimate load of bonded DCB.The ultimate load of the bonded DCB will increase,as the thickness of adhesive increases.The ultimate load of the bonded DCB will increase,as the adherends bending stiffness increases.The modeling method using VCCT can be used to simulate the failure behavior for the thick bond joint in wind turbine blade.
作者
李占营
鲁晓锋
杨苗苑
LI Zhan-ying;LU Xiao-feng;YANG Miao-yuan(Sinoma Wind Power Blade Co.,Ltd.,Beijing 100192,China;Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084,China)
出处
《玻璃钢／复合材料》
CAS
北大核心
2019年第12期34-38,共5页
Fiber Reinforced Plastics/Composites
基金
国家重点研发计划(2018YFB1501204)
关键词
胶接双悬臂梁
粘接胶厚度
铺层结构弯曲刚度
有限元法
虚拟裂纹闭合法
bonded double cantilever beam
adhesive thickness
adherent bending stiffness
finite element method
virtual crack closure technique
