Fatigue Load Conditions

Published on Jan 1, 2018
· DOI :10.1007/978-3-319-55411-2_33
Ian Ashcroft60
Estimated H-index: 60
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Abstract
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2 Citations
References46
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#1M. Costa (National Institute of Statistics and Geography)H-Index: 2
#2Giselle Maria Rachid Viana (National Institute of Statistics and Geography)H-Index: 6
Last. Raul D.S.G. Campilho (ISEP: Instituto Superior de Engenharia do Porto)H-Index: 42
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ABSTRACTEnvironmental factors, such as temperature and moisture, are known to have a degrading effect on the mechanical properties and performance of adhesive joints, which may be perceived as a non-problem because various works have shown that the static response of an adhesive is normally unaffected by slight moisture and temperature variations that occur in real-world applications. While this may be true, performance under purely static conditions is rarely found in commercial uses and most a...
59 CitationsSource
#1H. Khoramishad (IUST: Iran University of Science and Technology)H-Index: 17
#2A.D. Crocombe (University of Surrey)H-Index: 46
Last. Ian Ashcroft (Lboro: Loughborough University)H-Index: 60
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Abstract In this paper, the fatigue response of adhesively bonded joints under variable amplitude (VA) cyclic loading was predicted using a numerical model. The adhesive layer was modelled using the cohesive zone model with a bi-linear traction-separation response. A damage model, incorporating fatigue load ratio effects, was utilised in conjunction with the cohesive zone model to simulate the detrimental influence of VA fatigue loading. This model was validated against published experimental re...
44 CitationsSource
#1Naresh V. Datla (U of T: University of Toronto)H-Index: 13
#2Marcello Papini (RyeU: Ryerson University)H-Index: 40
Last. Jan K. Spelt (U of T: University of Toronto)H-Index: 48
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Abstract The effects of test environment humidity and temperature on the fatigue threshold and crack growth behavior of P2-etched and commercial coil-coated (CC) aluminum adhesive joints were studied under mixed-mode loading using aluminum asymmetric double cantilever beam (ADCB) specimens. Under dry conditions, increasing the temperature to 80 °C had an insignificant effect on the fatigue threshold, but caused an increase in the crack growth rates. At 40 °C, the fatigue behavior was insensitive...
39 CitationsSource
#1Naresh V. Datla (U of T: University of Toronto)H-Index: 13
#2J. UlicnyH-Index: 2
Last. Jan K. Spelt (U of T: University of Toronto)H-Index: 48
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Abstract Open-faced asymmetric double cantilever beam (ADCB) specimens of toughened epoxy-aluminum adhesive joints were aged either in a constant humidity environment or a cyclically changing environment to study the mixed-mode fatigue behavior. Under constant humidity environments, the fatigue threshold strain energy release rate initially decreased with aging time until it reached a constant minimum value for long times. In contrast, the crack growth rates continued to increase with aging time...
35 CitationsSource
#1K.B. KatnamH-Index: 17
#2A.D. Crocombe (University of Surrey)H-Index: 46
Last. Ian Ashcroft (Lboro: Loughborough University)H-Index: 60
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Advanced structural adhesives are now an important joining technique in automobile and aerospace applications. The perceived uncertainty in the long-term structural performance of bonded members when subjected to static/fatigue loads in aggressive environments is probably restricting an even more widespread use of this joining technology. In this article, the effect of moisture on the static and fatigue resistances of adhesively bonded laminate joints was investigated. Experimental tests were pe...
31 CitationsSource
#1M. Abdel Wahab (UGent: Ghent University)H-Index: 20
#2Irfan Hilmy (University of Surrey)H-Index: 5
Last. A.D. Crocombe (University of Surrey)H-Index: 46
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Based on the finite element results presented in part 1 of this paper, scarf joint was chosen for further experimental investigation in order to investigate triaxiality as a function of bondline angle. At laboratory scale, scarf joints can be manufactured relatively easy due to their simple geometry. In part 2 of this paper, scarf joints as well as additional jig/fixture were manufactured. The jig/fixture were used to hold the joint during heating process and to grip it during testing. Several l...
10 CitationsSource
#1Ahti Oinonen (Aalto University)H-Index: 4
#2Gary Marquis (Aalto University)H-Index: 19
This paper presents the development of a damage model for shear decohesion analysis of combined clamped and adhesively bonded (hybrid) interfaces. The model takes into account the influence of normal pressure on the applied shear force vs. displacement response. Decohesion finite elements were used for the setup of the cohesive zone and a damage function was set to govern the degradation. Material constants for the damage evolution model were fitted based on experiments and computational results...
15 CitationsSource
#1M. Abdel Wahab (UGent: Ghent University)H-Index: 20
#2Irfan Hilmy (University of Surrey)H-Index: 5
Last. A.D. Crocombe (University of Surrey)H-Index: 46
view all 4 authors...
In part 1 of this paper, the triaxiality function of several adhesive joints was investigated using the finite element method. The main aim of this investigation was to decide on the most suitable joint type for fatigue experimental tests, which can be used to control triaxiality in adhesive layers. These fatigue experimental tests are presented in this paper (part 2). In part 1 of this paper, three types of adhesive joints were considered. These were: butt joint, cleavage joint and scarf joint....
8 CitationsSource
#1V. Shenoy (Lboro: Loughborough University)H-Index: 6
#2Ian Ashcroft (Lboro: Loughborough University)H-Index: 60
Last. A.D. Crocombe (University of Surrey)H-Index: 46
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A unified model is proposed to predict the fatigue behaviour of adhesively bonded joints. The model is based on a damage mechanics approach, wherein the evolution of fatigue damage in the adhesive is defined as a power law function of the micro-plastic strain. The model is implemented as an external subroutine for commercial finite element analysis software. Three dimensional damage evolution and crack propagation were simulated using this method and an element deletion technique was employed to...
24 CitationsSource
#1H. Khoramishad (University of Surrey)H-Index: 17
#2A.D. Crocombe (University of Surrey)H-Index: 46
Last. Ian Ashcroft (Lboro: Loughborough University)H-Index: 60
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Abstract A reliable numerical damage model has been developed for adhesively bonded joints under fatigue loading that is only dependant on the adhesive system and not on joint configuration. A bi-linear traction–separation description of a cohesive zone model was employed to simulate progressive damage in the adhesively bonded joints. Furthermore, a strain-based fatigue damage model was integrated with the cohesive zone model to simulate the deleterious influence of the fatigue loading on the bo...
178 CitationsSource
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#1Grace Swee See Goon (MIT: Massachusetts Institute of Technology)H-Index: 1
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Abstract Membrane fouling is a ubiquitous challenge in water treatment and desalination systems. Current reverse osmosis (RO) membrane cleaning technology relies on chemical processes, incurring considerable costs and generating waste streams. Here, we present a novel chemical-free membrane cleaning method applicable to commercially existing RO spiral-wound membrane modules. The method employs controlled membrane deformation through pressure modulation, which induces shear stresses at the foulan...
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#1Roger A. Sauer (RWTH Aachen University)H-Index: 25
This work presents a survey of computational methods for adhesive contact focusing on general continuum mechanical models for attractive interactions between solids that are suitable for describing bonding and debonding of arbitrary bodies. The most general approaches are local models that can be applied irrespective of the geometry of the bodies. Two cases can be distinguished: local material models governing the constitutive behavior of adhesives, and local interface models governing adhesion ...
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#1Lucas F. M. da Silva (University of Porto)H-Index: 26
#2Raul D.S.G. Campilho (ISEP: Instituto Superior de Engenharia do Porto)H-Index: 42
The analysis of adhesively bonded joints started in 1938 with the closed-form model of Volkersen. The equilibrium equation of a single lap joint led to a simple governing differential equation with a simple algebraic equation. However, if there is yielding of the adhesive and/or the adherends and substantial peeling is present, a more complex model is necessary. The more complete is an analysis, the more complicated it becomes and the more difficult it is to obtain a simple and effective solutio...
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