Thermal stress singularity analysis for V-notches by natural boundary element method

• The nearly singular integral is reduced by one order in the newly established natural BEM. • The natural BEM can be used to calculate the thermal stress much closer to the boundary. • The thermal stress singularity is investigated basing on the near V-notch tip stress field. • The mathematic and physic double singularity are dealt with in the present paper. The accuracy of thermal stresses at internal points by the conventional boundary...