Effect of defects on load-carrying capability of fillet welded T-joints
Effect of defects on load-carrying capability of fillet welded T-joints
The effect of defects on the load-carrying behaviour of welded joint is investigated based on experimental and finite element studies on two types of fillet welded T-joints, one with various defects (referred to as T1) and the other of good quality (referred to as T2). Weld defects are examined through standard metallographic procedure. Material properties are obtained from tensile and hardness tests. The failure load, failure mode and load-strain curve of the T-joints under bending are recorded with strain gauge measurement and photography. Design strength of the joints specified by various codes are calculated and compared with the experimental results. T1 specimens are found to fail at a load much lower than the design strength, while the T2 specimens carried the load higher than the codes specified by 30% ~40% .Finite element simulation of the bending test is performed, providing detailed information of the stress and strain development and distribution around the welded area. Together with an additional study on the failure initiation position and crack propagation, weld defects
are found to be the main reason for the strength reduction of the T1 specimens. Weld throat is found not to be the failure plane and stresses are not uniformly distributed over the failure plane as assumed by codes.
practical bending, couplings, cracks, failure (mechanical), finite element analysis, hardness testing, strain gauges, tensile testing, welding
welds/ load-carrying capability, fillet welded T-joints, finite element
studies, weld defects, standard metallographic procedure, tensile test, hardness test, failure load, failure mode, load-strain curve, bending
test, strain gauge measurement, photography, design strength, failure
initiation position, crack propagation, weld throat/ E2210 Mechanical components, E0210L Numerical analysis, E1630 Testing, E2180B Plasticity (mechanical engineering), E2180E Fracture mechanics
and hardness (mechanical engineering), E1520E Joining processes and
welding
155-160
Wu, Aihui
fd825371-46f6-4fed-b32e-1c9908b1852b
Mellor, B.G.
2b13b80f-880b-49ac-82fe-827a15dde2fe
Syngellakis, S.
1279f4e2-97ec-44dc-b4c2-28f5ac9c2f88
February 2008
Wu, Aihui
fd825371-46f6-4fed-b32e-1c9908b1852b
Mellor, B.G.
2b13b80f-880b-49ac-82fe-827a15dde2fe
Syngellakis, S.
1279f4e2-97ec-44dc-b4c2-28f5ac9c2f88
Wu, Aihui, Mellor, B.G. and Syngellakis, S.
(2008)
Effect of defects on load-carrying capability of fillet welded T-joints.
Journal of Tongji University (Natural Science), 36 (2), .
Abstract
The effect of defects on the load-carrying behaviour of welded joint is investigated based on experimental and finite element studies on two types of fillet welded T-joints, one with various defects (referred to as T1) and the other of good quality (referred to as T2). Weld defects are examined through standard metallographic procedure. Material properties are obtained from tensile and hardness tests. The failure load, failure mode and load-strain curve of the T-joints under bending are recorded with strain gauge measurement and photography. Design strength of the joints specified by various codes are calculated and compared with the experimental results. T1 specimens are found to fail at a load much lower than the design strength, while the T2 specimens carried the load higher than the codes specified by 30% ~40% .Finite element simulation of the bending test is performed, providing detailed information of the stress and strain development and distribution around the welded area. Together with an additional study on the failure initiation position and crack propagation, weld defects
are found to be the main reason for the strength reduction of the T1 specimens. Weld throat is found not to be the failure plane and stresses are not uniformly distributed over the failure plane as assumed by codes.
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More information
Published date: February 2008
Keywords:
practical bending, couplings, cracks, failure (mechanical), finite element analysis, hardness testing, strain gauges, tensile testing, welding
welds/ load-carrying capability, fillet welded T-joints, finite element
studies, weld defects, standard metallographic procedure, tensile test, hardness test, failure load, failure mode, load-strain curve, bending
test, strain gauge measurement, photography, design strength, failure
initiation position, crack propagation, weld throat/ E2210 Mechanical components, E0210L Numerical analysis, E1630 Testing, E2180B Plasticity (mechanical engineering), E2180E Fracture mechanics
and hardness (mechanical engineering), E1520E Joining processes and
welding
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 149153
URI: http://eprints.soton.ac.uk/id/eprint/149153
ISSN: 0253-374X
PURE UUID: ff2cc0d7-9c18-4016-87a8-dc7d4f24ece9
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Date deposited: 30 Apr 2010 13:53
Last modified: 08 Jan 2022 17:26
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Contributors
Author:
Aihui Wu
Author:
B.G. Mellor
Author:
S. Syngellakis
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