| 摘要 |
<p>A method of determining residual stress within an object, comprising: defining a model for calculating the residual stress state within the object given an inelastic strain distribution within the object; representing the inelastic strain distribution as a combination of basis functions depending on a set of parameters; inputting values of at least one of the residual stress, the change of stress, strain, deformation, and distortion of the object obtained from measurement; defining a cost functional for evaluating the magnitude of the difference between said at least one of the residual stress, change of stress, strain, deformation , end distortion within the object, predicted by the model based on the strain basis functions and set of parameters, and the input values of the same obtained from measurement; adjusting the parameters to minimise the cost functional; and reconstructing the residual stress state within the object using the model and the strain basis functions together with the parameter values obtained in the adjusting process.</p> |
