Effects of Loading Speed and Shear Prestrain on Adhesive Fatigue Strength in Single-Lap Joint

Michihiro Takiguchi; Fusahito Yoshida

doi:10.4028/www.scientific.net/KEM.340-341.1479

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Effects of Loading Speed and Shear Prestrain on Adhesive Fatigue Strength in Single-Lap Joint
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 340-341Effects of Loading Speed and Shear Prestrain on...

Effects of Loading Speed and Shear Prestrain on Adhesive Fatigue Strength in Single-Lap Joint

Abstract:

The adhesive fatigue strength was investigated by performing repeated tensile lap shear experiments of an aluminum single-lap joint bonded with highly ductile acrylic adhesive. In load-controlled fatigue tests, progressive transverse shear deformation of the adhesive layer took place, and it led to the final fracture of the joint. The fatigue strength becomes higher with increasing loading speed, especially at low-cycle fatigue region. From experiments on shear-prestrained specimens, it was found that the prestrain does not affect so much the fatigue life. In order to discuss the behavior of progressive shear strain accumulation (viscoplastic ratcheting) of adhesive under cyclic loading, the numerical simulation of ratcheting was conducted using a constitutive model of elasto-viscoplasticity for the adhesive.

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Periodical:

Key Engineering Materials (Volumes 340-341)

Pages:

1479-1484

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.340-341.1479

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Online since:

June 2007

Authors:

Michihiro Takiguchi, Fusahito Yoshida

Keywords:

Adhesive Fatigue Strength, Numerical Simulation, Progressive Shear Strain Accumulation, Rate-Dependent Shear Strength, Shear Pretrain, Single-Lap Joint

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