Effect of Extensometer Usage on Obtaining the Force-Displacement Curve of the Adhesively Single Lap Joint

Year 2019, Volume: 3 Issue: 4, 142 - 146, 20.12.2019

Ahmet Çalık , Salih Akpınar

https://doi.org/10.26701/ems.646610

Cited By: 8

Abstract

Structural adhesively
bonded joints are frequently used in many areas spearheaded by the industries
such as automotive, marine space, and aviation due to the great advantages they
provide. Besides, load capacities of adhesively bonded joints which have
different geometries, are generally determined experimentally. Being compatible
of experimental and numerical analysis of adhesively bonded joints in the means
of both load carrying capacity and displacement has a great importance. But,
one of the most common problems in comparison of experimental and numerical
analyses is in spite of the coherence of experimental and numerical analyses in
load carrying capacity, it is observed that in the means of the displacement
analysis, there is incompatibility between those analyses. In the present study,
force-displacement curves of the single-lap cohesively bonded joints are
obtained experimentally by using both strokes of two different tensile test
machines which have identical calibrated load cells and video extensometer.
Experimentally obtained result was compared with numerical analysis. In the
experiments, AA2024-T3 aluminium and two-component Araldite 2015 were used as
adherend and adhesive, respectively. As a result, there is considerable
difference between the force-displacement curves of the single-lap overlap
joints which obtained experimentally from stroke and video extensometer. Also,
being new or old of the tensile test machines which have identical calibrated
load cells varies the displacement curve of the joint. When the experimental
data were compared with the results of the numerical analysis, it is concluded
that, obtaining the force-displacement curves of joints by using video
extensometer is more accurate.

Keywords

Bonding, Single-Lap Overlap Joint, Tensile Test, Video Extensometer, Mechanical Properties

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