An Improved Inherent Strain Analysis For Plate Bending By Line Heating Considering Phase Transformation of Steel

Abstract

The inherent strain method is known to be very efficient in predicting plate deformation due to line heating. However, in the actual line heating process in a shipyard, the rapid quenching changes the phase of steel. In this study, when calculating inherent strain, material properties of steel are applied differently in heating and in cooling, considering phase transformation. In this process, a new method which can reflect the thermal volume expansion of martensite is suggested. By this method, the plate deformations by line heating could be predicted more precisely.