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Bond-slip model of the CFRP-steel interface with the CFRP delamination failure
Composite Structures ( IF 6.3 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.compstruct.2020.113015
Yuyang Pang , Gang Wu , Haitao Wang , Danying Gao , Pu Zhang

Abstract The bond-slip model of a carbon fiber reinforced polymer (CFRP)-steel bonded interface is crucial for predicting the bond behavior of CFRP-strengthened steel structures. CFRP delamination failure is often encountered in existing studies on the bond behavior between CFRP plates and steel plates. However, this failure mode has been investigated by few scholars, especially regarding the interfacial bond-slip model based on CFRP delamination failure. In this paper, a total of 16 single-shear joints were manufactured to investigate the effects of the adhesive types, the adhesive thicknesses and the CFRP types with different inter-laminar shear properties on CFRP-steel bonded interfaces. Strains and displacements on the surface of the CFRP-steel joint were measured by three-dimensional digital image correlation (3D-DIC) technology. The bond-slip model based on CFRP delamination failure was established for the first time by introducing the inter-laminar shear strength, the inter-laminar shear modulus and the inter-laminar shear energy dissipation of the CFRP plate. The results showed that the adhesive thickness and the inter-laminar shear properties of the CFRP plate had a significant effect on the bond-slip model based on CFRP delamination failure. Finally, the accuracy of the model was verified by comparison with experimental data.

中文翻译:

CFRP-钢界面的粘结滑移模型与CFRP分层失败

摘要 碳纤维增强聚合物 (CFRP)-钢粘结界面的粘结滑移模型对于预测 CFRP 增强钢结构的粘结行为至关重要。CFRP 分层失效在现有的 CFRP 板与钢板之间的结合行为研究中经常遇到。然而,很少有学者研究这种破坏模式,特别是关于基于CFRP分层破坏的界面粘结滑移模型。在本文中,共制造了 16 个单剪接头,以研究粘合剂类型、粘合剂厚度和具有不同层间剪切性能的 CFRP 类型对 CFRP-钢结合界面的影响。CFRP-钢接头表面的应变和位移通过三维数字图像相关(3D-DIC)技术进行测量。通过引入CFRP板的层间剪切强度、层间剪切模量和层间剪切能量耗散,首次建立了基于CFRP分层破坏的粘结滑移模型。结果表明,CFRP板的胶粘剂厚度和层间剪切性能对基于CFRP分层破坏的粘结滑移模型有显着影响。最后通过与实验数据的对比验证了模型的准确性。结果表明,CFRP板的胶粘剂厚度和层间剪切性能对基于CFRP分层破坏的粘结滑移模型有显着影响。最后通过与实验数据的对比验证了模型的准确性。结果表明,CFRP板的胶粘剂厚度和层间剪切性能对基于CFRP分层破坏的粘结滑移模型有显着影响。最后通过与实验数据的对比验证了模型的准确性。
更新日期:2021-01-01
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