Designing for time-dependent crack growth in adhesive joints

Plausinis, D.; Spelt, J.K.

doi:10.1016/0143-7496(95)91625-g

Cited by 33 publications

(10 citation statements)

References 28 publications

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“…As shown in Figure 8, this caused a shallower slope for the mixed-mode creep crack growth curve compared to that in mode I These results are consistent with those of ref. [14], where only small differences were measured in G a /G cs among creep tests between Ψ=0º~ 40º. However, at =80º, G a /G cs was significantly higher than in mode I creep tests [14].…”

Section: Creep Testsmentioning

confidence: 95%

“…Under fixed displacement, crack growth has been observed in toughened epoxies at values of the applied strain energy release rate, G, well below the steady-state critical value in fracture, G cs [14]. In earlier work with two epoxy adhesives, the threshold value of G (i.e.…”

Section: List Of Figuresmentioning

confidence: 99%

“…This approach was similar to that used in the creep crack growth tests of ref. [14], both being derived from the same beam-on-elastic-foundation model.…”

Section: Strain Energy Release Rate and Mode Ratio Calculationsmentioning

confidence: 99%

“…These same procedures were used in ref. [14] to study time-dependent crack growth in two epoxy adhesives. Figure 6 shows the DCB specimens loaded under a constant displacement using either a 3.1 mm or 6.1 mm thick stainless steel wedge following the approach of [14].…”

Section: Fixed-displacement Creep Crack Growth Testsmentioning

confidence: 99%

“…[14] to study time-dependent crack growth in two epoxy adhesives. Figure 6 shows the DCB specimens loaded under a constant displacement using either a 3.1 mm or 6.1 mm thick stainless steel wedge following the approach of [14]. The DCB was clamped on its side to a flat surface and the 3.1 mm wedge was inserted slowly by tapping with a rubber mallet, taking care to ensure that the wedge remained straight so that the crack length was equal across the width of the specimen.…”

Section: Fixed-displacement Creep Crack Growth Testsmentioning

confidence: 99%

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Crack growth rate and crack path in adhesively bonded joints: Comparison of creep, fatigue and fracture

Jhin¹,

Azari²,

Ameli³

et al. 2013

International Journal of Adhesion and Adhesives

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The relationship between crack path and test method was examined by comparing the performance of adhesive-adherend combinations (six) in quasi-static fracture, mixed-mode fatigue, and creep crack growth. Crack paths in creep and quasi-static fracture were similar due to similar crack-tip plastic zone sizes in the epoxy adhesive even though the crack growth rates in creep were much smaller. Under condensed moisture and mixed-mode, creep and threshold fatigue tests produced interfacial failure. Under room-temperature dry environment, near threshold mixed-mode fatigue was interfacial, but was not in creep or quasi-static fracture.Smaller plastic zone size and crack path proximity to the interface that followed increased the sensitivity of near threshold, mixed-mode fatigue to surface properties. Therefore, the interfacial or cohesive failure of an adhesive system, which may judge the quality of the bond, can be a function of the test being conducted and may not be an absolute indicator of joint quality.iii Acknowledgements I would like to thank Professor Spelt and Professor Papini for their undivided attention to the progress of my research from my just starting learning about the theoretical and practical aspects of adhesive joints until the submission of my first journal paper. Without their direction and contribution, this thesis and its paper counter-part could not have reached the level of caliber and attention to detail that it has reached now. Although they probably deserve more than a brief mention, I would also like to thank all my previous and current lab mates who have been such a great help explaining to me all the theoretical and practical aspects of fracture mechanics, and how can I forget the innumerable hours spent on discussing research, science, politics and life in general. They are, without the order of importance: Siva Prasad Varma Nadimpalli, Naresh

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Section: Creep Testsmentioning

confidence: 95%

Section: List Of Figuresmentioning

confidence: 99%

“…This approach was similar to that used in the creep crack growth tests of ref. [14], both being derived from the same beam-on-elastic-foundation model.…”

Section: Strain Energy Release Rate and Mode Ratio Calculationsmentioning

confidence: 99%

Section: Fixed-displacement Creep Crack Growth Testsmentioning

confidence: 99%

Section: Fixed-displacement Creep Crack Growth Testsmentioning

confidence: 99%

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