Global ETD Search
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Showing 1 to 6 of 6 for “"Weld defects"”.
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A Heat Transfer Modeling Study of Rail Thermite Welding
… investigation is concerned with the effect of welding conditions on the development of fatigue-critical weld defects in rail thermite welds. Finite Element Modeling (FEM) was used to analyze the heat transfer behavior during the thermite welding process. The results of the thermal analyses were …
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Real time defect detection in welds by ultrasonic means
A computer controlled weld quality assurance system has been developed to detect weld defects ultrasonically whilst welding is in progress. This system, including a flash analogue to digital converter and built-in memories to store sampled data, a peak characters extractor and a welding process …
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Hybrid simulation of steel frames with semi-rigid connections
Fully-welded connections for earthquake resistance of steel frames are costly and their performance is adversely affected by weld defects and low-cycle fatigue. An alternative to welded connections is the bolted top and seat angle connection. The latter configuration can be designed to exhibit …
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The effects of hydrogen on the fracture behavior of welded carbon steel plate
… hydrogen on the fracture behavior of manual SMA welds in carbon steel plate was investigated utilizing modified ½T compact tension specimens. Tests performed on these specimens in the presence of hydrogen were compared to similar tests in helium. These tests showed that hydrogen lowers …
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Thermomechanical behavior of advanced manufactured heat-resistant alloys and their weldments
… of additive manufacturing (AM), explosion welding (EXW) cladding, and subsequent arc welding on the performance of a selected group of heat-resistant alloys under service conditions of generation 3 concentrated solar power (Gen3 CSP) systems. The performance aspects investigated include …
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Adaptive swarm optimisation assisted surrogate model for pipeline leak detection and characterisation.
… subject to leakage due to ageing, corrosion and weld defects. It is difficult to avoid pipeline leakage as the sources of leaks are diverse. Various pipeline leakage detection methods, including fibre optic, pressure point analysis and numerical modelling, have been proposed during the last …