Experimental Study of Mixed Mode Fatigue Crack Growth of Automotive Structural Adhesive BM4601

Published on Mar 28, 2017
· DOI :10.4271/2017-01-0331
Qiuren Chen3
Estimated H-index: 3
(NUAA: Nanjing University of Aeronautics and Astronautics),
Haiding Guo11
Estimated H-index: 11
(NUAA: Nanjing University of Aeronautics and Astronautics)
+ 2 AuthorsHong Tae Kang17
Estimated H-index: 17
(UM: University of Michigan)
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#1Qiuren Chen (NU: Nanjing University)H-Index: 1
#1Qiuren Chen (NU: Nanjing University)H-Index: 1
Last. John Joseph Francis Bonnen (Ford Motor Company)H-Index: 9
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#1Wei Jen Lai (UM: University of Michigan)H-Index: 2
#2Jwo Pan (UM: University of Michigan)H-Index: 15
In this paper, stress intensity factor solutions for adhesive-bonded lap-shear specimens of magnesium alloy AZ31 and hot-dip-galvanized (HDG) mild steel sheets with and without kinked cracks are investigated for fatigue life estimations. First, the kinked fatigue crack failure mode of the adhesive-bonded lap-shear specimens is briefly reviewed. Then, the analytical global J integral and effective stress intensity factor solutions for main cracks in lap-shear specimens of three dissimilar sheets ...
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#1Li Huang (NUAA: Nanjing University of Aeronautics and Astronautics)H-Index: 4
#1Li Huang (NUAA: Nanjing University of Aeronautics and Astronautics)H-Index: 4
Last. Xuming Su (Ford Motor Company)H-Index: 18
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#1T.A. Hafiz (University of Surrey)H-Index: 2
#2M.M. Abdel-Wahab (UGent: Ghent University)H-Index: 1
Last. Paul Smith (University of Surrey)H-Index: 41
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Abstract Fatigue tests have been carried out to investigate mixed mode fatigue crack growth behaviour in FM73 epoxy adhesive using double cantilever beam (DCB) specimens. The DCB configuration used consisted of equal thickness mild steel adherends bonded with FM73 adhesive. The joints were tested under pure mode I and a range of fatigue mixed-mode conditions using a relatively simple, variable-mode loading fixture developed in previous work [1]. The fatigue testing was carried out in displacemen...
13 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...
33 CitationsSource
#1S. Azari (U of T: University of Toronto)H-Index: 11
#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 effect of bondline thickness, from 130 μm to 790 μm, on the fatigue and quasi-static fracture behavior of aluminum joints bonded using a toughened epoxy adhesive was studied experimentally under mode-I (DCB) and mixed-mode (ADCB) loading. Under mode-I loading, it was found that the fatigue threshold energy release rate, Gth, decreased for very thin bondlines, while under mixed-mode loading, the Gth changed very little with bondline thickness. In both cases, the effect of bondline th...
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#1Naghdali Choupani (SUT: Sahand University of Technology)H-Index: 11
Abstract A broad experimental and analytical effort using fracture mechanics as the prime tool was conducted to investigate and improve the understanding of the mixed-mode cohesive fracture behavior of bonded joints. As a part of experimental efforts, mixed-mode fracture tests were performed using modified Arcan specimens consisting of several combinations of adhesive, composite and metallic adherends with a special loading fixture, in which by varying the loading angle, from 0° to 90°, mode-I, ...
74 CitationsSource
#1Alessandro Pirondi (University of Parma)H-Index: 17
#2Gianni Nicoletto (University of Parma)H-Index: 22
Fatigue crack growth (FCG) tests have been carried out on adhesively bonded compact tension-shear (CTS) specimens to assess the behaviour of a structural adhesive under Mixed Mode I/II conditions. The fractographic analysis revealed that energy dissipation mechanisms due to inelastic phenomena like bulk plastic deformation and crazing are more pronounced in Mode I than in Mixed Mode and Mode II. This is reflected by a FCG rate that increases going from Mode I to Mode II for a given value of the ...
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#1L. F. P. BorregoH-Index: 18
#2Fernando Antunes (UC: University of Coimbra)H-Index: 24
Last. J.A.M. Ferreira (UC: University of Coimbra)H-Index: 32
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Abstract Fatigue crack propagation tests in compact mixed-mode specimens were carried out for several stress intensity ratios of mode I and mode II, K I / K II , in AlMgSi1-T6 aluminium alloy with 3 mm thickness. The tests were performed in a standard servo-hydraulic machine. A linkage system was developed in order to permit the variation of the K I / K II ratio by changing the loading angle. Crack closure loads were obtained through the compliance technique. A finite element analysis was also d...
79 CitationsSource
There are many advantages that polymeric adhesives can offer compared to the more traditional methods of joining such as bolting, brazing, welding, mechanical fasteners, etc. and epoxy adhesives represent the most common type of structural adhesive. When polymerised, epoxy adhesives are amorphous and highly-crosslinked materials and this microstructure results in many useful properties for structural engineering applications, such as a high modulus and failure strength, low creep, and, by carefu...
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Cited By1
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#1Qiuren Chen (NUAA: Nanjing University of Aeronautics and Astronautics)H-Index: 3
#2Haiding Guo (NUAA: Nanjing University of Aeronautics and Astronautics)H-Index: 11
Last. Xuming Su (Ford Motor Company)H-Index: 18
view all 5 authors...
Abstract Mixed-mode fatigue crack growth behavior of an automotive adhesive bonding system (AA5754O- A951-BM4601) has been investigated using a compound compact mixed-mode specimen. The test was performed under load control with 0.1 R ratio and 3Hz frequency. A long-distance moving microscope was employed to record the real-time length of the fatigue crack in the adhesive layer during testing. The strain energy release rate components of the crack were analyzed by finite element method. The pure...
11 CitationsSource