# Reliability analysis of metal‐composite adhesive joints under debonding modes I, II, and I/II using the results of experimental and FEM analyses

Published on Dec 1, 2019in Fatigue & Fracture of Engineering Materials & Structures3.031
· DOI :10.1111/FFE.13078
Estimated H-index: 1
(TMU: Tarbiat Modares University),
M. Malakouti1
Estimated H-index: 1
(TMU: Tarbiat Modares University),
Estimated H-index: 16
(TMU: Tarbiat Modares University)
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Abstract
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References27
#1Wandong Wang (TU Delft: Delft University of Technology)H-Index: 7
#2Romina Lopes Fernandes (TU Delft: Delft University of Technology)H-Index: 4
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Abstract An essential question to predict the structural integrity of bi-material bonded joints is how to obtain their fracture properties under pure mode I. From open literature, it is found that the most commonly used design criterion to test mode I fracture is matching the flexural stiffnesses of the two adherents in a DCB coupon. However, the material asymmetry in such designed joints results in mode II fracture as well. In this paper, a new design criterion is proposed to obtain pure mode I...
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#1Ali Delbariani-Nejad (TMU: Tarbiat Modares University)H-Index: 2
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Abstract Since there are many uncertainty sources in composite laminates such as fiber and matrix material properties, reliability analysis of laminates under specific loading modes has been of significant importance in many applications. This paper represents a method for reliability analysis of E-Glass/Epoxy composite laminates in the presence of the most common and catastrophic failure mode in macro-scale, i.e. delamination under mode I, mode II, and mixed mode I/II using an energy based appr...
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The nanosheet boehmite (AlOOH) was synthesized and used as reinforcing agent to toughen carbon fiber-reinforced polymers. The purity, morphology, size and composition of the AlOOH nanosheets were investigated by the methods of XRD, SEM, TEM and FTIR, respectively. Interlaminar fracture toughness for mode II deformation was investigated for carbon fiber-reinforced polymers toughened by AlOOH nanosheets varying the contents at room temperature (RT, 293k) and at low temperature (LT, 77k). The fract...
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#1M. A. S. Santos (ISEP: Instituto Superior de Engenharia do Porto)H-Index: 1
#2Raul D.S.G. Campilho (ISEP: Instituto Superior de Engenharia do Porto)H-Index: 42
The use of adhesive joints in industrial applications has been increasing. To increase the confidence in the design of adhesive structures, it is important to be able to accurately predict their strength and fracture properties (critical strain energy release rate in tension, $$G_{\mathrm{IC}}$$, and shear, $$G_{\mathrm{IIC}})$$. As in most cases loads induce mixed-mode (tension plus shear), it is of great importance the perception of fracture under these conditions, in which relates to the stra...
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#1Sofia Teixeira de Freitas (TU Delft: Delft University of Technology)H-Index: 13
#2Jos Sinke (TU Delft: Delft University of Technology)H-Index: 22
The aim of this research is to analyse the failure of a Fiber Metal Laminate (FML) skin adhesively bonded to a Carbon Fiber Reinforced Polymer (CFRP) stiffener, under quasi-static loading at different environmental temperatures (−55 °C, Room Temperature RT and +100 °C) and under fatigue loading at RT. This bonded joint was tested using stiffener pull-off tests, which is a typical setup used to simulate full-scale components subject to out-of-plane loading. The failure sequence for all test condi...
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#1Ali Delbariani-Nejad (Sharif University of Technology)H-Index: 1
#2Saeed Adib Nazari (Sharif University of Technology)H-Index: 1
Studying the reliability of cracked structures under different types of failure modes such as a mixture of Mode I and Mode II loadings has been of great importance in many applications. The purpose of this study is to evaluate the effects of different modes of loading, i.e. pure Mode I, pure Mode II and Mixed mode I/II loadings on the reliability of cracked structures via three typical case studies including 1st: through crack in a very wide plate, 2nd: cracked pressurized fuselage and 3rd: crac...
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#1K. Senthil (VSSC: Vikram Sarabhai Space Centre)H-Index: 4
#2A. Arockiarajan (Indian Institute of Technology Madras)H-Index: 16
Last. R. Palaninathan (Indian Institute of Technology Madras)H-Index: 10
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Abstract The characterization of fracture toughness or critical energy release rate of adhesive joint in composite structures is a key parameter. In the present study, fracture toughness of adhesively bonded composite joints is experimentally investigated for the basic fracture modes. Experiments are conducted on the double cantilever beam, end notched flexure and edge crack torsion specimens to determine the fracture toughness of three modes, namely mode-I, mode-II and mode-III. Specimens are b...
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#1Sofia Teixeira de Freitas (TU Delft: Delft University of Technology)H-Index: 13
#2Jos Sinke (TU Delft: Delft University of Technology)H-Index: 22
Abstract The purpose of this research is to evaluate the performance of two adhesively bonded skin-to-stiffener connections: composite stiffener bonded to a Fiber Metal Laminate (FML) skin, representing a hybrid joint, and an Aluminium stiffener bonded to a FML skin, representative for a metal joint. The bonded joints were tested using Stiffener Pull-Off Tests (SPOT), which is a typical set-up used to simulate the structural behavior of full-scale components subject to out-of-plane loading, such...
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#1Jie Liu (Hunan University)H-Index: 12
#2Qixiang Qing (Hunan University)H-Index: 11
Last. H. Yin (Hunan University)H-Index: 1
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In this paper, a coupled reliability method for structural fatigue evaluation considering load shedding is first proposed based on probabilistic fracture mechanics in which the uncertainties of the structural parameters are taken into account. Then, the method is applied to predict the fatigue reliability of the T-welded structure to the case of considering load shedding or not. The compared results show that by considering the load shedding, the structural fatigue reliability might be improved ...
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#1Hossein Hosseini-Toudeshky (AUT: Amirkabir University of Technology)H-Index: 20
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Last. M.S. Goodarzi (AUT: Amirkabir University of Technology)H-Index: 3
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Abstract In this paper, progressive debonding of the blade root joint of a 660 kW wind turbine under cyclic loading is studied. Progressive fatigue debonding of this adhesive joint is analyzed using cohesive zone interface modeling. The blade is subjected to various loadings such as aerodynamic forces, centrifugal force, weight, and force due to the change in wind direction. A user defined material subroutine is used in the ANSYS finite element code to predict both the crack (debonding) initiati...
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Abstract null null The pure mode-II fracture behavior of an adhesively bonded glass fiber reinforced polymer (GFRP)/steel joint was experimentally investigated using a four-point end-notched flexure (4ENF) test. Cracking of the 4ENF specimen initiated and propagated in the adhesive-steel surface. The dominant failure mode observed in all specimens was adhesive-steel interface failure. The compliance of the 4ENF specimen was determined with the rigid joint model and finite element method. The ext...
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#2Sarah Green (Lancaster University)H-Index: 36
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This paper reviews the reported literature on dissimilar (non-matched adherend) adhesively bonded joints (ABJs), currently used bonding processes, and the mechanisms by which these types of joints ...
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In the framework of the Cost Action CERTBOND (Reliable roadmap for certification of bonded primary structures), a wide group of researchers from 27 European Countries have had the opportunity to wo...
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Abstract Expressions for the energy release rate and compliance are defined for some asymmetric beam like specimens. The expressions are derived taking into account the Timoshenko beam theory with elastic foundation. The energy release rate is expressed by the applied loads or by a combination of loads and rotation angles, the latter allows to characterize bonded interfaces without taking into account the elastic foundation properties. The condition of stability under displacement controlled tes...
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This paper aims to propose a temperature-dependent cohesive model to predict the delamination of dissimilar metal–composite material hybrid under Mode-I and Mode-II delamination. Commercial nonlinear finite element (FE) code LS-DYNA was used to simulate the material and cohesive model of hybrid aluminium–glass fibre-reinforced polymer (GFRP) laminate. For an accurate representation of the Mode-I and Mode-II delamination between aluminium and GFRP laminates, cohesive zone modelling with bilinear ...
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#1Zhengwen JiangH-Index: 2
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Abstract The pure mode-I, pure mode-II and the mixed-mode I/II fracture behavior of the adhesively-bonded pultruded GFRP/steel joint were experimentally investigated by using double cantilever beam (DCB) test, and four-point end-notched flexure (4ENF) test combined with four-point single leg bending (4SLB) test, respectively. The extended global method (EGM) was employed to obtain closed-form analytical solutions of mode-II fracture toughness for the 4ENF specimen and mixed-mode I/II fracture to...
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#1Ali Delbariani-Nejad (TMU: Tarbiat Modares University)H-Index: 2
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Abstract In this study, a failure criterion based on energy is developed to predict the onset and growth of matrix cracking induced delamination, known as MCID. This criterion is formulated upon the concept of fracture mechanics by comparison of energy release rate and interface fracture toughness. At first, an effective stiffness model (ESM) is proposed to calculate the equivalent stiffness of a cracked ply. This failure criterion is developed as a general model so that it can be appropriate fo...
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