IMECH-IR  > 流固耦合系统力学重点实验室
Numerical analysis of effect of cohesive parameters on mixed-mode failure of double-scarf adhesive joint subjected to uniaxial tensile loadings
Liao LJ(廖丽涓); Huang CG(黄晨光); ljl@imech.ac.cn; huangcg@imech.ac.cn
Source PublicationPROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2015, VOL 2B
2015
Conference NameProceedings of the ASME 2015 International Mechanical Engineering Congress & Exposition
Conference DateNov. 13-19, 2015
Conference PlaceHouston, TX
AbstractIn the present study, the effects of cohesive parameters on the mixed-mode failure of double-scarf adhesive joint (DSAJ) subjected to uniaxial tensile loadings were examined and discussed numerically. For DSAJ with no perpendicular or parallel with the external loading direction, complex stress state (mixture of tensile and shear stresses) occurs at the adhesive interface. In addition, adhesive joint failure, which is a gradually process rather than a sudden transition, is accompanied by energy dissipates gradually at the crack tip. Correspondingly, cohesive zone model (CZM) coupled with finite element method (FEM) was implemented to verify the mechanism of crack from initiation to the complete failure. As the constitutive relation of the adhesive layer, the traction separation (T-S) law determines the interface damage evolution. Additionally, the shape of T-S curves in mode I and mode II are crucially decided by the cohesive strengths and critical fracture energies in each mode, respectively. Firstly, the non-dimensional-normalized form of ultimate tensile loading of DSAJ was obtained using dimensional analysis. Then, three cases of cohesive parameters (case of constant anisotropy extent & case of constant critical fracture energy in each mode & case of constant cohesive strength in each mode) according to the non-dimensional-normalized form of adhesive properties were designed. Two types adhesives (brittle and ductile) were chosen to examine the effects of adhesive properties on the failure of DSAJ in this study. To avoid the influence of the geometries on DSAJ mechanical behaviors, the thickness of the adhesive layer and the scarf angle 0 were held constantly, respectively. In numerical calculations, the change trends of the ultimate tensile loading (F-u), the failure energy (E-f) and the damage level (D) corresponding to F-u with respect to the cohesive parameters were discussed. It can be observed the cohesive strengths in mode I and mode II codetermine F of DSAJ with unequal rates. Moreover, Ef of DSAJ, which is the necessary energy for the joint failure, is governed by the critical fracture energies in mode I and mode II with different contributions. Besides, it also obtained that the evolutions of D corresponding to F-u of DSAJ with brittle and ductile adhesives are certain different. Generally, D of DSAJ with brittle adhesive is higher and more uneven than that of DSAJ with ductile adhesive. Accordingly, it can be concluded that DSAJ with brittle adhesive has lower ability to distribute the loading over a smaller cohesive zone with less uniform distribution. In addition, the numerical results revealed that with the increment of ratio in each case set in this paper, D of DSAJ does not rise obviously.
WOS IDWOS:000379703000031
DepartmentLMFS冲击与耦合效应(LHO)
ISBN978-0-7918-5736-6
Indexed ByCPCI-S ; EI
Language英语
Citation statistics
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58338
Collection流固耦合系统力学重点实验室
Corresponding Authorljl@imech.ac.cn; huangcg@imech.ac.cn
Recommended Citation
GB/T 7714
Liao LJ,Huang CG,ljl@imech.ac.cn,et al. Numerical analysis of effect of cohesive parameters on mixed-mode failure of double-scarf adhesive joint subjected to uniaxial tensile loadings[C],2015.
Files in This Item: Download All
File Name/Size DocType Version Access License
ASME-IMECE2015-50118(809KB)会议论文 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liao LJ(廖丽涓)]'s Articles
[Huang CG(黄晨光)]'s Articles
[ljl@imech.ac.cn]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liao LJ(廖丽涓)]'s Articles
[Huang CG(黄晨光)]'s Articles
[ljl@imech.ac.cn]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liao LJ(廖丽涓)]'s Articles
[Huang CG(黄晨光)]'s Articles
[ljl@imech.ac.cn]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: ASME-IMECE2015-50118.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.