Crack initiation in single lap joints: effects of geometrical and material properties

Weißgraeber, Philipp; Felger, Julian; l’Armée, Andreas Talmon; Becker, Wilfried

doi:10.1007/s10704-015-9992-6

Cited by 16 publications

(3 citation statements)

References 39 publications

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“…More information concerning the application of the coupled criterion on single-lap joint is provided in the work of Moradi et al [23] using linear elastic FE calculations (associated with an analytical approach to determine the length and the load at initiation) or in the work of Weißgraeber et al [27] using non-linear elastic FE calculations (associated with an optimisation method to determine the length and the load at initiation). The two methods compared by Weißgraeber et al [26] lead to close results in terms of initiation load (the non-linear analysis leading to a 20% decrease in the failure load for the larger overlap length) but induce different crack paths. The non-linear approach predicts an initiated crack with an angle of 10° whereas this crack is located at the interface for the linear approach.…”

Section: Effects Of the Distance Between Two Pores: Crack Initiation When Two Pores Interactmentioning

confidence: 95%

Theoretical study based on 2D assumptions of the influence of small pores on crack initiation in adhesively bonded joints

Carrère

Doitrand

Martín

et al. 2021

International Journal of Adhesion and Adhesives

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The intrinsic performance of epoxy adhesives seems to designate them as the ideal solution for assembling certain materials. Pore can have an influence on the load at which the first crack is initiated and on the final strength. In the context of damage tolerance, this work aims to explore the effect of small voids that cannot be detected by conventional non-destructive testing (NDT). To attain this goal, a method based on a criterion coupling strength and toughness is used. 2D finiteelement calculations are performed on simple configurations to understand the steps leading to failure when pores are present. When the defects are far from the edges, the loss in load at the initiation of the first crack is a function of the minimum distance between two pores. When the location of the defect interacts with the stress concentration due to a free edge, this loss is a function of the minimum spacing between pores and the free edge. The knock-down factor on the load at failure for a bonded joint with epoxy adhesives remains small (close to the defect area divided by the total area of the bondline). The presence of pores may change the fracture surface (from an adhesive one without pore to a cohesive one with pores).

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Section: Effects Of the Distance Between Two Pores: Crack Initiation When Two Pores Interactmentioning

confidence: 95%

Theoretical study based on 2D assumptions of the influence of small pores on crack initiation in adhesively bonded joints

Carrère

Doitrand

Martín

et al. 2021

International Journal of Adhesion and Adhesives

View full text Add to dashboard Cite

show abstract

“…Several research groups have numerically implemented this approach to investigate different types of adhesive joints [208][209][210]. We should not overlook that the effect of nonlinearities of the adherends or the joint must be negligible using this approach [211,212].…”

Section: Fracture Mechanics Modelsmentioning

confidence: 99%

From fundamental concepts to recent developments in the adhesive bonding technology: a general view

Borges

Akhavan‐Safar

Tsokanas

et al. 2023

Discov Mechanical Engineering

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Adhesive bonding is a constantly developing technique, and the volume of its industrial applications is rapidly increasing, which, in turn, requires improving the compatibility and performance of joining methods in specific applications. The industrial growth of adhesive bonding has also been linked to the broader implementation of composite materials and the increasing number of applications requiring joining dissimilar materials. Compared to traditional joining methods, adhesive bonding does not require local heating of the substrates or introducing holes or notches to them. It is instead a continuous joining method that promotes fewer regions of discontinuities and uniformity of the stress fields. Due to the industrial interest in this method, a substantial effort has been made to expand its range of applications and to provide the design tools that ensure it is a safe, reproducible, reliable, and durable process. The adhesive bonding research field is broad, ranging from adhesive formulation to evaluation of the final bonded structure. The present paper collects the relevant literature and discusses fundamental concepts and recent developments in the adhesive bonding technology, covering three essential topics: adhesive materials, joint designs and joint manufacturing methods, and joint modelling methods. Citing a wealth of relevant review papers, original papers, and book chapters, the paper intends to provide a coherent view of the state of the art, so the reader can identify the opportunities originating from the recent progresses in adhesive bonding.

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“…Many applications of the CC can be found in the literature with a wide range of structural applications including free-edge delamination, transverse cracking and notched strength of composite laminates [36][37][38][39][40][41], adhesive and brazed joints [42][43][44][45][46][47][48], crack onset at Vnotches [49][50][51], cracking in ceramic laminates [52][53][54]. An overview of applications and an extensive list of references can be found in review papers [55][56].…”

Section: The Coupled Criterionmentioning

confidence: 99%

A finite fracture model for the analysis of multi-cracking in woven ceramic matrix composites

Martín

Leguillon

et al. 2018

Composites Part B: Engineering

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:A finite fracture approach based on the Coupled Criterion is used to analyze multi-cracking in a woven ceramic matrix composite. In-situ micrographic observations obtained during tensile and bending tests performed on chemical vapor infiltrated SiC/SiC samples are utilized to identify cracking mechanisms. A two dimensional finite element model is generated to approximate the actual specimen section geometry including matrix, fiber tows and porosity. Numerical simulations are carried out with a dedicated algorithm to simulate nucleation and propagation of cracks. Comparing the simulation results with experimental ones shows that the model captures the main cracking features.

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Crack initiation in single lap joints: effects of geometrical and material properties

Cited by 16 publications

References 39 publications

Theoretical study based on 2D assumptions of the influence of small pores on crack initiation in adhesively bonded joints

Theoretical study based on 2D assumptions of the influence of small pores on crack initiation in adhesively bonded joints

From fundamental concepts to recent developments in the adhesive bonding technology: a general view

A finite fracture model for the analysis of multi-cracking in woven ceramic matrix composites

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