Application of fracture mechanics to predict the failure load of adhesive joints used to bond CFRP laminates to steel members

André, Alann; Haghani, Reza; Biel, Anders

doi:10.1016/j.conbuildmat.2011.07.040

Cited by 28 publications

(8 citation statements)

References 22 publications

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“…Derwnko introduced a function for normal and frictional stresses of the interface in aluminum‐glass/epoxy composite adhesive joints. Using numerical and experimental approaches, Andre et al investigated the adhesive strength of steel‐CFRP structures in mode I, mode II, and mixed mode I/II. DCB, single side shear (SSS), and reinforced bending specimens were utilized for mode I, mode II, and mixed mode I/II, respectively.…”

Section: Introductionmentioning

confidence: 99%

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

Delbariani-Nejad

Malakouti

Farrokhabadi

2019

Fatigue Fract Eng Mat Struct

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In the present study, the experimental and finite element (FE) analyses are first carried out to investigate the deboning behavior of metal‐composite adhesive joints under modes of I and mode II loading. To conduct an FE on the debonding propagation, cohesive zone method (CZM), as well as maximum nominal stress and energy criteria, is applied. In the reliability analysis, to achieve the probability of debonding growth (PODG), limit state functions are formulated based on the energy release rate. To that end, the first‐order reliability method (FORM), the second‐order reliability method (SORM), and the Monte Carlo simulation (MCS) are used to calculate the PODG. The effect of initial debonding length on the PODG in all mentioned modes is investigated. Results obtained from reliability analysis reveal that the random variables including the initial debonding length, width, and thickness are the most sensitive variables to ascertain the PODG.

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Section: Introductionmentioning

confidence: 99%

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

Delbariani-Nejad

Malakouti

Farrokhabadi

2019

Fatigue Fract Eng Mat Struct

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“…The Linear Elastic Fracture Mechanics (LEFM) approach is a simple approach to estimate G for strength prediction purposes [30]. However, difficulties arise when dealing with materials (e.g., adhesives) with ductility.…”

Section: Fracture Toughness Estimationmentioning

confidence: 99%

Validation of fracture envelopes of structural adhesives for mixed-mode strength prediction of bonded joints

Campilho

Ribeiro²,

Rocha³

et al. 2019

Frattura Ed Integrità Strutturale

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In the design of adhesive structures, it is extremely important to accurately predict their strength and fracture properties (critical strain energy release rate in tension, GIC, and shear, GIIC). In most cases, the loads occur in mixed-mode (tension plus shear). Thus, it is of great importance the perception of fracture in these conditions, namely of the strain energy release rates in tension, G I , and shear, G II , relative to different crack propagation criteria or fracture envelopes. This comparison allows to determine the most suitable energetic propagation criterion to be used in cohesive zone models (CZM). The main objective of this work is to verify, by CZM, which is the power parameter () that best suits the energetic crack propagation criterion for CZM modelling, using single-lap joints (SLJ) and double-lap joints (DLJ) with aluminium adherends and bonded with three different adhesives. With this purpose, numerical simulations of the SLJ and DLJ are carried out, and the maximum load (Pm) is compared with experiments. For the Araldite ® AV138 and Araldite ® 2015, the energetic criterion resulting from the experimental work provided matching numerical results and, thus, the fracture envelopes were validated. The Sikaforce ® 7752 results were slightly offset due to CZM law shape issues.

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“…7,23 It is also known that the mode mixture, i.e. combination of pure Modes I and II, plays a key role in the failure mechanism of adhesive joints and is a determinant of the ultimate load and the failure mode in the joint.…”

Section: Design Of Appropriate Representative Specimenmentioning

confidence: 99%

Design of Adehsive Joints in FRP-Bonded Steel Beams

Haghani

Al‐Emrani

Kliger

2012

Int. J. Str. Stab. Dyn.

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The use of bonded carbon¯ber-reinforced polymer (CFRP) laminates to strengthen and upgrade existing structures has attracted a great deal of attention during the past two decades. Fiber-reinforced polymer (FRP) bonding has been widely researched and practiced in the strengthening of concrete members. However, when it comes to steel structures, it is somewhat limited in terms of¯eld applications. One of the most important obstacles to the widespread use of FRP bonding in steel structures is the lack of design codes. This is mainly due to the lack of suitable design models for adhesive joints used to bond FRP laminates to steel substrates. Issues such as the lack of knowledge about the behavior of adhesive joints, the lack of suitable material models for structural adhesives, and analyzing adhesive joints are contributing to the di±culty associated with establishing design models. This paper is mainly concerned with a proposal and veri¯cation of a new design model for adhesive joints used to bond FRP laminates to steel beams. The paper,¯rst, shortly reviews the most commonly used failure criteria and presents the background to the newly proposed model. Quasi-static tests were then performed on steel plate and full-scale beam specimens bonded with CFRP laminates to evaluate the new design model. The new design model presented in this paper was found to be accurate in terms of predicting the ultimate load and failure mode of the joints. To illustrate the application of the new design model, an example is appended to this paper.

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Application of fracture mechanics to predict the failure load of adhesive joints used to bond CFRP laminates to steel members

Cited by 28 publications

References 22 publications

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

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

Validation of fracture envelopes of structural adhesives for mixed-mode strength prediction of bonded joints

Design of Adehsive Joints in FRP-Bonded Steel Beams

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