Mode I fracture R-curve and cohesive law of CFRP composite adhesive joints

Tauheed, Mohd.; Datla, Naresh V.

doi:10.1016/j.ijadhadh.2022.103102

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…More information on TSL extraction using the direct technique may be found in the literature. [25] 4 | FINITE ELEMENT MODELING the top surface of the adhesive as well as the bottom surface of the CFRP adherend (see Figure 3A). The water ingress from the sides is not considered as during aging the sides were sealed with insulating tape.…”

Section: Methodsmentioning

confidence: 99%

“…The mechanical characteristics of unidirectional CFRP laminate and structural adhesive were obtained from the literature (see Table 1). [25,26]…”

Section: Materials Specificationsmentioning

confidence: 99%

“…[16] The openfaced specimens were then aged at 40 C and 82% RH for the specified aging times. While aging, a tape was fixed to the sides of the specimen that stopped water diffusion T A B L E 1 Mechanical characteristics of unidirectional CFRP laminate and structural adhesive [25,26]…”

Section: Aging and Fracture Testing Of Jointsmentioning

confidence: 99%

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Degradation prediction of mode I cohesive laws of hygrothermally aged CFRP adhesive joint using a direct method and accelerated aging

Tauheed

Datla

2023

Polymer Composites

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A framework has been proposed to predict the mode I cohesive law parameters of degraded composite adhesive joint using direct method and accelerated aging tests. Double cantilever beam (DCB) specimens made with CFRP and epoxy were used to study mode I fracture. Accelerated and uniform aging was achieved using open‐faced specimens aged at 40°C and 82% relative humidity. Fracture testing of aged open‐faced specimens along with crack‐tip images were used to determine the degradation in traction‐separation law (TSL) with an aging. These correlations with bilinear TSL with aging were then used to develop a 3D finite element model of a closed DCB specimen that captures the nonuniform degradation across the specimen width. The TSL parameters degraded significantly at the edges compared with width center for closed DCB specimens. Reasonable agreement was observed between the predictions and the maximum load response of the closed joint.

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Section: Methodsmentioning

confidence: 99%

“…The mechanical characteristics of unidirectional CFRP laminate and structural adhesive were obtained from the literature (see Table 1). [25,26]…”

Section: Materials Specificationsmentioning

confidence: 99%

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Degradation prediction of mode I cohesive laws of hygrothermally aged CFRP adhesive joint using a direct method and accelerated aging

Tauheed

Datla

2023

Polymer Composites

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“…Studying fracture behavior in its different pure modes under fatigue loading on fiber-reinforced composite materials is a complex phenomenon that requires thorough investigation. While research into Mode I fracture [29,30] has received significant attention from various authors, Mode II fracture, whether under static or dynamic loading, has been less studied, and there is limited literature available [31][32][33][34]. The fracture in this mode occurs when surfaces slide laterally against each other in parallel directions; this is called shear fracture.…”

Section: Introductionmentioning

confidence: 99%

Mode II Delamination under Static and Fatigue Loading of Adhesive Joints in Composite Materials Exposed to Saline Environment

Vigón,

Argüelles,

Lozano

et al. 2023

Materials

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This study investigates the fatigue delamination behavior of adhesive joints in epoxy carbon composite materials under Mode II fracture loading. The joints were characterized using the End-Notched Flexure (ENF) test, comprising adhesive joints formed by bonding two unidirectional carbon fiber epoxy matrix laminates with epoxy adhesive. These joints were subjected to different exposure periods (1, 2, 4, and 12 weeks) in a saline environment. Prior to dynamic fatigue testing, critical Mode II energy release rate values were determined through quasi-static tests, serving as a reference for subsequent fatigue characterization. This study aimed to comprehend how exposure duration to a saline environment affected the initial stage of fatigue delamination growth and employed a probabilistic model based on the Weibull distribution to analyze the experimental data. The results, gathered over a two-year experimental program, revealed varying behaviors in adhesive joint resistance to delamination based on exposure duration. A noteworthy reduction in fatigue strength capacity was observed, with fracture energies for infinite fatigue life reaching approximately 20% of their static loading capacity. This study sheds light on the deterioration of adhesive joints when exposed to a saline environment.

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Mode I tensile fracture behavior of adhesively-bonded metal–metal, metal–CFRP, and CFRP–CFRP bi-material combinations analyzed by size effect method

Qiao

Merkel

Nickerson

et al. 2022

Composites Part A: Applied Science and Manufacturing

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Mode I fracture R-curve and cohesive law of CFRP composite adhesive joints

Cited by 12 publications

References 19 publications

Degradation prediction of mode I cohesive laws of hygrothermally aged CFRP adhesive joint using a direct method and accelerated aging

Degradation prediction of mode I cohesive laws of hygrothermally aged CFRP adhesive joint using a direct method and accelerated aging

Mode II Delamination under Static and Fatigue Loading of Adhesive Joints in Composite Materials Exposed to Saline Environment

Mode I tensile fracture behavior of adhesively-bonded metal–metal, metal–CFRP, and CFRP–CFRP bi-material combinations analyzed by size effect method

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