{'fraction_non_alphanumeric': 0.01589242053789731, 'fraction_numerical': 0.007334963325183374, 'mean_word_length': 5.062962962962963, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
VALIDATION SPECIMEN FOR CONTOUR METHOD EXTENSION TO MULTIPLE RESIDUAL STRESS COMPONENTS

A new theoretical development has been made that will allow the contour method to measure a cross-sectional map of not just the normal stress but all three normal stress components. To validate this development, a residual stress test specimen was designed, fabricated and then tested with different experimental techniques. A 60-mm diameter ×10-mm thick disk of 316L stainless steel was plastically compressed through the thickness with a 15 mm diameter flat indenter in the center of the disk to provide a unique biaxial stress state that is ideal for testing the theory. The stresses in the specimen were first mapped using time-of-flight neutron diffraction. Next, the hoop stresses were mapped on a cross-section using the contour method, and the agreement with the neutron measurements was excellent. The extension of the contour method to multiple components requires the measurement of in-plane stresses on the cut surface, after electrochemical removal of material affected by the cut. An initial attempt to measure the in-plane stresses using x-ray diffraction was unsuccessful because of the large grain size of the material. Further attempts will be made using hole drilling. A finite element prediction of the stresses from the indentation process gave reasonable agreements with the data but was limited in its accuracy because the 316L showed a Bauschinger effects that has not yet been correctly modelled. The indented specimen makes an excellent residual stress test specimen, and suggestions for improving the specimen are given.