摘要
通过两种方法制备了风电叶片大梁用拉挤板复合组件Ⅰ型层间断裂韧性试样即双悬臂梁(double cantilever beam,DCB)试样,并依据ASTM D5528进行试验,研究分析其断裂行为。实验结果表明,直接采用树脂进行复合的DCB试样会因内聚破坏和界面破坏的相互转换而导致非稳定扩展,进而使得应变能释放率迅速下降。含有导流织物的DCB试样其裂纹扩展较为稳定,匹配性较好导流织物可以提高Ⅰ型层间断裂韧性(GIC)。采用有限元平台的内聚力模型(cohesive zone model,CZM)模拟含有导流织物试样的裂纹扩展过程,结果表明内聚力模型模拟结果与试验的一致性较好。在裂纹起始扩展阶段,界面增韧作用越强,对模拟影响越大,但当裂纹稳定扩展之后,界面的增韧作用基本不对内聚力模型模拟产生影响。
Double cantilever beam(DCB)specimens were made from pultruded panels assemblies used for wind turbine blades by two methods.The mode Ⅰ interlaminar fracture toughness was determined according to ASTM D5528 standard,and the fracture mechanics were analyzed.The experimental results showed that on the DCB specimens bonded with resin only,unstable crack growth occured due to the mutual conversion between cohesive failure and interface failure,and then the strain energy release rate decreased rapidly.On the DCB specimens containing fabrics as flow media,the crack growth was more stable,and the mode Ⅰ interlaminar fracture toughness(GIC)was improved effectively when compatible flow media were used..The propagation of cracks on those specimens with flow media was simulated by finite element method using cohesive zone model(CZM).It showed that the simulation results of CZM were well agreed with the experimental results.The stronger the toughening effect,the greater the influence on the simulation at the beginning of crack propagation.But when the cracks grew stably,the toughening effect had little influence on the simulation of CZM.
作者
文治天
谢梦媛
孙闪闪
郝郑涛
方允伟
冯冠铭
倪启凡
Wen Zhitian;Xie Mengyuan;Sun Shanshan;Hao Zhengtao;Fang Yunwei;Feng Guanming;Ni Qifan(Nanjing GuoCai Testing Co.,Ltd,Nanjing 210012)
出处
《玻璃纤维》
CAS
2023年第2期33-40,共8页
Fiber Glass
基金
中国建材集团攻关专项资助、特种纤维复合材料国家重点实验室应用基础研究专项资,助项目编号:2021YCJS02。
关键词
拉挤板材复合组件
Ⅰ型层间断裂韧性
导流织物
内聚力模型
有限元分析
pultruded panels assemblies
mode Ⅰ interlaminar fracture toughness
flow media
cohesive zone model
finite element analysis
