Computational Model for Progressive Failure of Adhesively Bonded Joints

Goyal, Vinay K.; Johnson, Eric R.; Cassino, Chris

doi:10.2514/6.2003-1597

Cited by 5 publications

(6 citation statements)

References 10 publications

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“…Recent efforts include the following techniques: continuous cohesive zone method, [3][4][5][6][7] discrete cohesive zone method, [8][9][10][11][12][13][14][15] virtual crack closure technique, [16][17][18][19][20][21][22] element internal cohesive segments, 23 and other adhesive region models. [24][25][26][27] The references provided here are not an exhaustive list.…”

Section: Introductionmentioning

confidence: 99%

“…Others have employed "smooth" laws, though it does not appear that they were chosen with improved convergence as their primary goal. For example, Goyal et al 26 used a law based on the exponential function which therefore has no stiffness discontinuities. A line search algorithm was employed and the stiffness was set to zero when the law was undergoing strain softening.…”

Section: Introductionmentioning

confidence: 99%

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Efficient and Robust Traction Laws for the Modeling of Adhesively Bonded Joints

Gustafson¹,

Waas²

2008

49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference &Amp;lt;br> 16th AIAA/ASME/AHS Ada

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A discrete cohesive zone method finite element is used to evaluate traction law efficiency and robustness in predicting decohesion in a finite element model. Three traction laws are reported and are compared from the perspective of their computational efficiency and robustness. The smooth traction laws (based on the beta distribution and sine functions) are found to have greater computational efficiency than the trapezoidal traction law. Efficiency gains are due to the elimination of the stiffness discontinuities associated with the generalized trapezoidal traction law. The sinusoidal traction law is found to be more robust and efficient than the other traction laws.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient and Robust Traction Laws for the Modeling of Adhesively Bonded Joints

Gustafson¹,

Waas²

2008

49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference &Amp;lt;br> 16th AIAA/ASME/AHS Ada

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“…Continuous cohesive zone method (Kafkalidis and Thouless, 2002;Xie et al, 2005b;Li et al, 2005Li et al, , 2006Valoroso and Champaney, 2006), discrete cohesive zone method (Hillerborg et al, 1976;Waas, 1994, 1995;Borg et al, 2001Borg et al, , 2002Gustafson and Waas, 2007). Though they are perhaps less well known, other adhesive region models have been developed including: Munoz et al (2006), Goncalves et al (2002), Goyal et al (2003), Davies et al (2006) and Remmers et al (2003). These references do not constitute an exhaustive list.…”

Section: Introductionmentioning

confidence: 96%

The influence of adhesive constitutive parameters in cohesive zone finite element models of adhesively bonded joints

Gustafson

Waas

2009

International Journal of Solids and Structures

164

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Keywords: Single lap joint Double cantilever beam End notch flexure Adhesive bond Parameter interaction Composite Computer experiments Fracture Kriging analysis Latin hypercube sampling Toughness Strength Sensitivity a b s t r a c tThe influence of adhesive parameters on the outcome of cohesive zone finite element simulations is reported. The simulations are of adhesively bonded joint configurations that are used to characterize joint performance (including the double cantilever beam, the end notch flexure, and the single lap joint). The coupon level experiments are often used individually to determine a single parameter in an adhesive constitutive model (such as a cohesive strength or toughness). In this study, the influence of strength, toughness, and other parameters are considered simultaneously in examining their effect on the finite element (FE) output for each test. In specifying input parameters, the assumed shape of the cohesive traction law is also considered. It is shown that the double cantilever beam model output is dependent primarily on one parameter, whereas the end notch flexure and single lap joint models are dependent on multiple adhesive parameters. By extension, these dependencies require consideration when mapping the results of physical experiments into a set of adhesive model inputs. It is also shown that the shape of the traction law appears insignificant to the outcome of the models. Sensitivities to input parameters are illuminated through kriging analysis of the finite element results; the parameter values are chosen via Latin hypercube sampling. Surrogate models are created and are used to quantify the sensitivities. A mapping technique is described for evaluating the output of physical tests.

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“…Continuum finite element (FE) models of adhesively bonded joints are widely available in the literature, where work began as early as 1971 (Wooley and Garver, 6 and Adams and Peppiatt 7 are early references). More recently, promising advances in cohesive zone (including Kafkalidis and Thouless, 8 Xie et al, 9 Li et al, 10,11 Valoroso and Champaney 12 ), discrete cohesive zone (Xie et al 13 ), fracture mechanics (Weerts and Kossira 14 ), probabilistic prediction (Aydemir and Gunay, 15 Koutsourelakis et al 16 ), virtual crack closure (including Gillespie et al, 17 Wang et al, 18 Glaessgen et al, 19 Krueger, 20 Xie et al [21][22][23] ), and other adhesive region models (including Munoz et al, 24 Goncalves et al, 25 Goyal et al 26 ) have greatly increased the predictive capability of FE techniques. Cohesive zone models have been incorporated into commercial software, including Abaqus R , 27 as well as freely available research codes like Tahoe R .…”

mentioning

confidence: 99%

A Macroscopic Finite Element for a Symmetric Double Lap Joint Subjected to Mechanical and Thermal Loading

Gustafson

Waas

2007

48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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A thermo-mechanical analytical model and a corresponding macroscopic bonded joint finite element is presented for the analysis of orthotropic double lap joints subjected to combined thermal-mechanical loads. The analytical solution offers an improvement in accuracy over its predecessor, 1, 2 at the cost of increased solution complexity. However, to facilitate the use of this solution, it has been incorporated into a macroscopic bonded joint finite element. 3 The single element reproduces the analytical solution with minimal analyst input, and therefore can be easily incorporated into early design studies. The macroscopic element provides a computationally efficient and mesh independent comparative stress result. To validate the element, the stress predictions of the single element are compared with a continuum finite element model.

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Computational Model for Progressive Failure of Adhesively Bonded Joints

Cited by 5 publications

References 10 publications

Efficient and Robust Traction Laws for the Modeling of Adhesively Bonded Joints

Efficient and Robust Traction Laws for the Modeling of Adhesively Bonded Joints

The influence of adhesive constitutive parameters in cohesive zone finite element models of adhesively bonded joints

A Macroscopic Finite Element for a Symmetric Double Lap Joint Subjected to Mechanical and Thermal Loading

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