Strength prediction and reliability of brittle epoxy adhesively bonded dissimilar joint

Afendi, M.; Majid, Abdul; Daud, Ruslizam; Abdul, Rahman Ahiruddin; Teramoto, Tokuo

doi:10.1016/j.ijadhadh.2013.03.008

Cited by 27 publications

(10 citation statements)

References 25 publications

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“…Double-Edge Notched Beam (DENB) (Murphy, 1979), Center Slit Beam (CSB) (Murphy, 1988), Single Edge Notched Beam (SENB) (Hunt & Croager, 1982;Russell, 1982;Mall & Mol, 1991) are performed to analyze the mode II fracture toughness for composite materials and as well as wood and a number of metals. These configurations are somehow differ from the conventional test configurations often used for mode I and mode II fracture testing of brittle and quasi-brittle materials like glass, rock, concretes, some polymers, ceramics, graphite and etc (Bocca et al, 1991;Chang et al, 2006;Aliha & Saghafi, 2013;Berto et al, 2012;Gómez et al, 2009;Suresh et al, 1990;Akbardoost & Rastin, 2015;Afendi et al, 2013;Maccagno & Knott, 1989;Aliha & Ayatollahi, 2008;Rao et al, 2003;Lim et al, 1993;Negro et al, 2003;Awaji & Sato 1978;Aliha et al, 2017a-e;Mirsayar et al, 2014Mirsayar et al, , 2018Fakhri et al, 2017;Razavi et al, 2018;Heidari-Rarani et al, 2014;Ameri et al, 2012Ameri et al, ,2016Ayatollahi et al, 2011;Ahmad 1993). However, one of the undeniable mandatory information is estimation of material properties like shear strength.…”

Section: Introductionmentioning

confidence: 98%

Orthotropic mode II shear test fixture: Iosipesque modification

Khansari¹,

Farrokhi²,

Mosavi³

2019

10.5267/j.esm

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In-plane strength and constitutive properties of composite materials is known as crucial problems. Although, several studies have been made for obtaining the in-plane mode II properties, the common test fixtures are blind in confrontation of shear zone. Furthermore, toughening mechanisms and consequently mode II fracture toughness cannot be evaluated, precisely. Also, proposing the convenient configuration of shear test fixture increase the accuracy of evaluation for the shear-zone energy dissipation, especially in orthotropic materials. Hence in the present research, a novel shear fixture configuration is proposed based on Iosipesque structural modification. Hereof, some arbitrary composite materials (e.g. graphite/epoxy and wood) were studies on the basis of DOE and E-691 ASTM. Furthermore, as the numerical method for indicating the comparison of the uniform and non-uniform shear stress distribution in the modified and common shear test fixture, a statistical procedure is used based on ASTM standard in addition to FEM analysis. The obtained results reveal that applying major amendments through the new scheme of the shear test fixture, would provide a remarkable precision and a reasonable estimation of the shear strength in comparison with the previous Iosipesque experiments.

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Section: Introductionmentioning

confidence: 98%

Orthotropic mode II shear test fixture: Iosipesque modification

Khansari¹,

Farrokhi²,

Mosavi³

2019

10.5267/j.esm

View full text Add to dashboard Cite

show abstract

“…These wide applications are due to creep resistance [7], excellent adhesion to many substrates [8], high temperature performance [9], high stiffness [10], and high mechanical and electrical properties [11]. However, almost all EPs are brittle [12][13][14]. Many tougheners such as carboxyl-terminated butadiene-acrylonitrile (CTBN) [15,16], core-shell rubber (CSR) particles [17,18], thermoplastic or thermoset polymers [19,20], and organicinorganic particles [21,22] have been incorporated to increase the toughness of EP resins.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Cure Kinetics and Physical-Mechanical Properties of PEG/Nanosilica/Epoxy Composites

Varzeghani

Amraei

Mousavi

2020

International Journal of Polymer Science

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This study investigated the effect of polyethylene glycol (PEG) and nanosilica (NS) on the physical-mechanical properties and cure kinetics of diglycidyl ether of bisphenol-A-based epoxy (DGEBA-based EP) resin. For this purpose, tensile and viscometry tests, dynamic mechanical thermal analysis (DMTA), and differential scanning calorimetry (DSC) were carried out under dynamic conditions. The results showed that adding NS and PEG enhances the maximum cure temperature as well as the heat of cure reaction (ΔH) in EP-NS, while it decreases in EP-PEG and EP-PEG-NS. The cure kinetic parameters of EP-PEG-NS were calculated by Kissinger, Ozawa, and KSA methods and compared with each other. The Ea calculated from the Kissinger method (96.82 kJ/mol) was found to be lower than that of the Ozawa method (98.69 kJ/mol). Also, according to the KAS method, the apparent Ea was approximately constant within the 10-90% conversion range. Tensile strength and modulus increased by adding NS, while tensile strength diminished slightly by adding PEG to EP-NS. The glass transition temperature (Tg) was calculated using DMTA which was increased and decreased by the addition of NS and PEG, respectively. The results of the viscometry test showed that the viscosity increased with the presence of both PEG and NS and it prevented the deposition of solid particles.

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“…However, as an inherently brittle material, epoxy thermosets are highly susceptible to defects/cracks [1][2][3]. Fracture/fatigue loadings, thermal effects or any kind of environmental effects influence the matrix service life.…”

Section: Introductionmentioning

confidence: 99%

‘Containers’ for self-healing epoxy composites and coating: Trends and advances

Vijayan¹,

Al-Maadeed²

2016

Express Polym. Lett.

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Abstract.The introduction of self-healing functionality into epoxy matrix is an important and challenging topic. Various micro/nano containers loaded self-healing agents are developed and incorporated into epoxy matrix to impart self-healing ability. The current report reviews the major findings in the area of self-healing epoxy composites and coatings with special emphasis on these containers. The preparation and use of polymer micro/nano capsules, polymer fibers, hollow glass fibers/bubbles, inorganic nanotubes, inorganic meso-and nano-porous materials, carbon nanotubes etc. as self-healing containers are outlined. The nature of the container and its response to the external stimulations greatly influence the self-healing performance. The self-healing mechanism associated with each type of container and the role of container parameters on self-healing performance of self-healing epoxy systems are reviewed. Comparison of the efficiency offered by different types of containers is introduced. Finally, the selection of containers to develop cost effective and green self-healing systems are mentioned.

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Strength prediction and reliability of brittle epoxy adhesively bonded dissimilar joint

Cited by 27 publications

References 25 publications

Orthotropic mode II shear test fixture: Iosipesque modification

Orthotropic mode II shear test fixture: Iosipesque modification

Dynamic Cure Kinetics and Physical-Mechanical Properties of PEG/Nanosilica/Epoxy Composites

‘Containers’ for self-healing epoxy composites and coating: Trends and advances

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