Search results for " hole drilling method"

showing 2 items of 2 documents

A New Procedure for the Evaluation of Non-Uniform Residual Stresses by the Hole Drilling Method Based on the Newton-Raphson Technique

2010

The hole drilling method is one of the most used semi-destructive techniques for the analysis of residual stresses in mechanical components. The non-uniform stresses are evaluated by solving an integral equation in which the strains relieved by drilling a hole are introduced. In this paper a new calculation procedure, based on the Newton-Raphson method for the determination of zeroes of functions, is presented. This technique allows the user to introduce complex and effective forms of stress functions for the solution of the problem. All the relationships needed for the evaluation of the stresses are obtained in explicit form, eliminating the need to use additional mathematical tools. The t…

Hole drilling methodEngineeringbusiness.industryMechanical EngineeringAerospace EngineeringMechanical engineeringDrillingStructural engineeringStress functionsInverse problemIntegral equationResidual stresses Hole drilling method Inverse problems Newton Raphson technique Experimental stress analysissymbols.namesakeSettore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineMechanics of MaterialsResidual stressSolid mechanicssymbolsbusinessNewton's method
researchProduct

ERROR AND UNCERTAINTY ANALYSIS OF THE RESIDUAL STRESSES COMPUTED BY USING THE HOLE DRILLING METHOD

2011

The hole-drilling method is one of the most used techniques for the experimental analysis of the residual stresses in mechanical components. For both through-thickness uniform and non-uniform residual stresses, its practical application is standardised by the ASTM E837-08. For uniform residual stresses, to which the present work deals with, the use of the method in accordance with the ASTM limitations, leads to results with a bias of about 10%. Unfortunately, although some experimental parameters can be frequently out of the corresponding standard limitation, the user does not have appropriate procedures to correct the obtained results which, in accordance with the ASTM standard, have to be…

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di Macchineresidual stresses hole drilling method uncertainty analysis
researchProduct