Application of ADINA and hole drilling method to residual stress determination in weldments

Residual stress distributions with depth at weld toes in controlled shot-peened, high strength steel weldments were determined through the measurement of relaxed surface strains by the incremental hole drilling method. The stress states were determined from the relaxed surface strains by a novel elasto-plastic interpretation of the strain readings, using the finite element software, ADINA. Residual stress distributions determined from the theory of elasticity, using experimental strain gauge readings from the hole drilling method, gave values much greater than the 0.2% offset yield stress of 613 MPa. The stress states were corrected through elasto-plastic finite element modeling using ADINA. After the corrections, the maximum residual stress was less than 613 MPa. The corrected stress distributions were applied to determine the effect of controlled shot peening on residual stress distributions with depth. The distributions within 0.8 mm below the material surface was used as an indicator of shot-peening depth and the effect of control parameters.