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Aditya Narayanan summary slides 2017


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Personal research summary 2017

Published in: Engineering
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Aditya Narayanan summary slides 2017

  1. 1. Effect of Residual Stresses on the Failure of Laser Cladded Rail Dr Aditya Narayanan, Research Associate 21 September 2016 1
  2. 2. Objectives • Measure residual stresses after laser cladding • Determine the effect of residual stresses on fracture of rail • Develop FE model to simulate laser cladding process and predict how parameters influence stress state 2 Rail joint Cladded rail Above: Section of cladded rail near an insulated rail joint; joint consists of electrical insulator and is used for signalling (ruler shown for scale)
  3. 3. Residual Stresses in Rail Samples 3 Left: 0.5 m length of cladded rail (martensitic clad on rail steel) set up for neutron diffraction on translatable stage Above: Schematic of strain directions obtained using this experimental arrangement Rail Stage Neutron detectors Incident beam (thick arrow) εzz εyy Diffracted beam (thin arrows) Detector