Sulla misura delle tensioni residue con il metodo del foro: metodi di calcolo per le tecniche sperimentali a campo intero

The hole drilling technique is a well known experimental method for residual stress investigation. This technique is usually used in combination with electrical strain gages but there is no reason to enforce this choice and other approach are possible. In particular some optical measurement techniques (grating interferometry, speckle interferometry, holographic interferometry, shearography) can be advantageously used. Since all these optical techniques give a full field information, it becomes important to properly use their data to increase the robustness and reliability of the analysis. In this work, various well known approaches to this problem will be investigated using a known displacement field as a reference. In this way it will be possible to discover the best performing algorithm in terms of robustness and reliability.