Thermal Stresses in Thermal Insulation Layer of L. P. G. Tanker

Abstract

Thermal stresses in urethane foam insulation layer of L. P. G. container are theoretically analyzed, and also photothermo-elastic ecperiments are carried out. The results are as follows: (1) Stresses are maximum at the contact plane of insulation layer and container wall. (2) The value of maximum stress is -(1-(αs)/α)(αET_<-1>)/(1-v).