Fatigue Failure Criterion of Adhesively-Bonded Joints Under Combined Stress Conditions

Imanaka, Makoto; Iwata, Toshiaki

doi:10.1080/00218469608011081

Cited by 16 publications

(9 citation statements)

References 7 publications

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“…Liniecki et al [13], Imanaka and Iwata [14,15] and Ishii et al [16] used the stress or stress amplitude to predict the fatigue life of a specimen. Although this information can be useful, these models do not provide any information on the delamination growth rate and thus cannot be used to predict the effect of defects.…”

Section: Stress/strain Based Methodsmentioning

confidence: 99%

Methods for the prediction of fatigue delamination growth in composites and adhesive bonds – A critical review

Pascoe

Alderliesten

Benedictus

2013

Engineering Fracture Mechanics

228

145

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An overview is given of the development of methods for the prediction of fatigue driven delamination growth over the past 40 years. Four categories of methods are identified: stress/strain-based models, fracture mechanics based models, cohesive-zone models, and models using the extended finite element method. It is highlighted that most models are phenomenological, based on the observed macro-scale behaviour of test specimens. It is suggested that a more physics based approach, focusing on elucidating the mechanisms involved, is needed to come to a full understanding of the problem of delamination growth.

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Section: Stress/strain Based Methodsmentioning

confidence: 99%

Methods for the prediction of fatigue delamination growth in composites and adhesive bonds – A critical review

Pascoe

Alderliesten

Benedictus

2013

Engineering Fracture Mechanics

228

145

View full text Add to dashboard Cite

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“…In such cases of combined stresses the knowledge of stress distributions in the adhesive layer must by coupled with a suitable failure criterion obtained from adhesive joints in order to predict the fatigue strength of adhesive joints with a high degree of accuracy. In order to obtain fatigue failure criterion under combined stress conditions, Imanaka and Iwata [9] conducted fatigue tests using two kinds of adhesively-bonded joint configurations: scarf joints and butterfly-type butt joints, and the relationship between the principal stress ratio and fatigue strength of adhesive joints was investigated. They concluded that the theories of maximum principal, von Mises and maximum shear stresses were not adequate for estimating endurance limits of these adhesive joints, but they found correlation with the principal stress ratio at the endurance limit.…”

Section: Introductionmentioning

confidence: 99%

The effects of stress state, loading frequency and cyclic waveforms on the fatigue behavior of silver-filled electronically-conductive adhesive joints

Gomatam¹,

Sancaktar²

2006

Journal of Adhesion Science and Technology

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Conductive adhesives and filled adhesive systems, in general, are used in a variety of engineering applications. There are a number of issues of concern in the design of joints bonded using electronically conductive adhesives (ECAs) and subjected to cyclic loading. These include the effects of stress state and cyclic parameters (frequency and waveform) of mechanical and/or thermal loading on the fatigue failure behavior of adhesively-bonded joints. In order to study the effects of these parameters on joint behavior, two different joint geometries were designed and tested under a spectrum of fatigue and environmental conditions. The results of our work indicated a profound influence of the stress state and cyclic waveform type on the fatigue strength of the joints. Lowering the cyclic load frequency was also found to reduce the fatigue life of the bonded joints.

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“…All the data points in Fig. 5 were taken in the uniform stress range of the adhesive layer, using the stress distributions obtained from FEM analysis and the values in Table 1 as well as the values in the previous study [1] for the adhesive layer thickness t=0.1 mm. As can be seen in the figure, the endurance limits decrease with increasing t~3/a ~ irrespective of the adhesive layer thickness.…”

mentioning

confidence: 99%

“…In a previous study [1], we proposed a method for evaluating the fatigue strength under multiaxial stress condition using adhesively bonded butt, scarf and butterfly type butt joints, where the stress multiaxiality in the adhesive layer was varied in a wide range. These joints with thin adhesive layer thickness have considerable uniform stress distributions except at the free end of the adhesive layer.…”

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confidence: 99%

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Effect of adhesive layer thickness on fatigue strength of adhesively bonded butt, scarf and butterfly type butt joints

Imanaka¹,

Iwata

1996

Int J Fract

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Recently, adhesive bonding methods have been applied for joining of several structural members. To extend the application of adhesively bonded joints, it is necessary to define fracture criteria for the joints. In particular, fatigue failure criteria are crucial for adhesive joints as mechanical parts in cyclic loads via vibration and transmission of power. Furthermore, most of the bonded joints have complex multiaxial stresses in the adhesive layer; hence fatigue fracture criteria for the joints should be based on the fatigue strength under multiaxial stress conditions.In a previous study [1], we proposed a method for evaluating the fatigue strength under multiaxial stress condition using adhesively bonded butt, scarf and butterfly type butt joints, where the stress multiaxiality in the adhesive layer was varied in a wide range. These joints with thin adhesive layer thickness have considerable uniform stress distributions except at the free end of the adhesive layer. However, an increase in the adhesive layer thickness enlarges the range having nonuniform stress distributions, resulting in lowering of the adhesive strength. To obtain critical fatigue strength of the joints under multiaxial stress conditions, the effect of adhesive layer thickness on the fatigue strength must be quantified.Some studies have been published on the effect on the static and fatigue strength of the butt joint [2][3][4][5]; however, there are few studies on the scarf and butterfly type joints [6,7]. Furthermore, the effect of adhesive layer thickness on the fatigue strength of these joints has not been investigated. In the present study, fatigue tests under multiaxial stress conditions were conducted for the three types of butt, scarf and butterfly type butt joints in a variety of scarf angle and adhesive layer thickness.Int ~u r n o¢ Fracture 80 (1996) R70 An 0.5% C Carbon steel (JIS.S55C) was used as the adherend for butt, scarf and butterfly type butt joints, and the adhesive was a thermosetting epoxy adhesive (Toyoda Gosei: EA9432NA).The shape and sizes of the butt and scarf joints used in this study are shown in Fig. 1, where the scarf angle 0 was of four values: 300,450,60 ° and 90 ° (butt joint). As shown in this figure, the width of the adherend was varied in accordance with the scarf angle 0 so as to maintain a constant adhesive area of 190 mmh Figure 2 illustrates the details of the butterfly type butt joint together with its loading frame. This basic geometry was proposed by Arcan et al. [8]; the adhesive area was also the same as that of the scarf joints. The butterfly type butt joint was assembled into the loading frame by six pins. Then, the assembled loading frame was fixed with two pins into a fatigue testing machine. In this study, the fatigue tests were conducted under conditions where the center of the adhesive layer was located on the loading line (0---0°).The adhesively bonded joints were prepared as follows: the bonding surfaces of the adherends were polished with emery paper of grade 180 mesh under a dry condi...

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Fatigue Failure Criterion of Adhesively-Bonded Joints Under Combined Stress Conditions

Cited by 16 publications

References 7 publications

Methods for the prediction of fatigue delamination growth in composites and adhesive bonds – A critical review

Methods for the prediction of fatigue delamination growth in composites and adhesive bonds – A critical review

The effects of stress state, loading frequency and cyclic waveforms on the fatigue behavior of silver-filled electronically-conductive adhesive joints

Effect of adhesive layer thickness on fatigue strength of adhesively bonded butt, scarf and butterfly type butt joints

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