Multiaxial fatigue life evaluation of tubular adhesively bonded joints

Nayeb-Hashemi, Hamid; Rossettos, J. N.; Melo, A.P.

doi:10.1016/s0143-7496(96)00023-1

Cited by 42 publications

(22 citation statements)

References 12 publications

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“… It is evident that TC and THG measure higher values than lap tests in compression and A4PB only on joined SiC (Table ), as already reported in with a similar comparison work. It is known that lap joints produce underestimated and apparent shear strength of joint: and have reported such a trend for the torsion of tubular adhesively bonded joints. Their results show that an almost 50% higher shear stress than that under uniaxial load is required for failure under torsion.…”

Section: Resultsmentioning

confidence: 84%

Torsion Tests on AV119 Epoxy – Joined SiC

Ferraris

Salvo

Casalegno

et al. 2012

Int J Applied Ceramic Tech

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The results of an experimental investigation on epoxy-joined silicon carbide tested in shear mode by four different configurations of torsion test are presented and compared to results obtained by asymmetric four-point bending and four different lap tests in compression. All samples have been joined by an epoxy adhesive (Araldite AV119) which is to be considered as a model brittle joining material chosen to obtain several joined samples in a reasonable time. Advantages and disadvantages of each configuration are discussed and compared to results previously obtained with epoxy-joined Carbon/Carbon composites and ceramics tested with the same methods. *monica.ferraris@polito.it

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Section: Resultsmentioning

confidence: 84%

Torsion Tests on AV119 Epoxy – Joined SiC

Ferraris

Salvo

Casalegno

et al. 2012

Int J Applied Ceramic Tech

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“…In, torsion and single lap tests on epoxy joined metallic samples were compared to verify the reliability of the proposed torsion apparatus: it was found that the shear strength measured with the proposed torsion shear fixture is higher than that measured with the conventional step lap specimen, as also noticed by and in where an almost 50% higher shear stress is required at the interface for bond failure under torsion, than under uniaxial load.…”

Section: Resultsmentioning

confidence: 89%

Torsional Shear Strength of Silicon Carbide Components Pressurelessly Joined by a Glass‐Ceramic

Ferraris

Salvo

Rizzo

et al. 2012

Int J Applied Ceramic Tech

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Silicon carbide (SiC) samples have been joined by a pressureless slurry based method. The CaO-Al 2 O 3 (CA) glass-ceramic joining material has been characterized in term of crystalline phases and thermal and mechanical properties. A torsion test based on miniaturized hourglass shaped specimens has been used as pure shear strength test method for joined ceramic samples. Torsion results are compared to those obtained by a single lap offset (SLO) test in compression on the same joined materials. Pure shear strength of 104 ± 25 MPa has been measured by torsion test, whereas single lap offset gave 36 ± 8 MPa.*monica.ferraris@polito.it

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“…For an applied harmonic torsional load, the displacements of adherent 1 at its outer surface, adherent 2 at its inner surface and the adhesive layer can be presented as u 1 …x; t †û 1 …x † e iwt , u 2 …x; t †ˆu 2 …x † e iwt and u a …x; r; t †ˆu a …x; r † e iwt respectively. Substituting for the adhesive displacement, equation (4) can be written as…”

Section: Theoretical Investigationmentioning

confidence: 99%

Dynamic response of tubular joints with an annular void subjected to a harmonic torsional load

Vaziri

Nayeb-Hashemi

2002

Proceedings of the Institution of Mechanical Engineers, Part K:

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Dynamic responses of adhesively bonded tubular joints subjected to a harmonic torsional load are evaluated. The adherents are assumed to be elastic, and the adhesive is taken to be a linear viscoelastic material. The in uence of the adherents and the adhesive properties on the joint response as well as on the shear stress amplitude distribution along the overlap is investigated. Furthermore, the effects of defects such as an annular void in the bond area on the dynamic response and shear stress amplitude distribution in the bond area are studied. The results indicate that, for the tubular joint geometries and properties investigated, the natural frequencies of the joint are little affected by the adhesive loss factor. The natural frequencies of the joint initially increase rapidly with increasing adhesive shear modulus. However, the natural frequencies asymptotically approach a constant value with further increase in adhesive shear modulus. The results further show that the natural frequencies of the joint may not be affected with the presence of a central void in the bond area.The distribution of the shear stress amplitude in the joint area was obtained. The maximum shear stress was con ned to the edge of the overlap for all applied loading frequencies. For the adhesive and adherent properties and geometries investigated, the maximum shear stress amplitude in the joint area was little affected by the presence of a central annular void covering up to 40 per cent of the oveplap length. The result showed that the shear stress amplitude distribution is more sensitive to the void location than to the void size. This was especially pronounced for voids located close to the edge of the overlap.A central void larger than 40 per cent of the overlap length may be detrimental or bene cial to the joint strength. This depends on the applied loading frequency. A central void reduces the system resonance frequency. This may take the system further away from the applied loading frequency or may bring it closer. A system excited closer to or further from its resonance frequency will develop a higher or lower shear stress amplitude in the bond area.

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Multiaxial fatigue life evaluation of tubular adhesively bonded joints

Cited by 42 publications

References 12 publications

Torsion Tests on AV119 Epoxy – Joined SiC

Torsion Tests on AV119 Epoxy – Joined SiC

Torsional Shear Strength of Silicon Carbide Components Pressurelessly Joined by a Glass‐Ceramic

Dynamic response of tubular joints with an annular void subjected to a harmonic torsional load

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