{'fraction_non_alphanumeric': 0.013824884792626729, 'fraction_numerical': 0.0030721966205837174, 'mean_word_length': 4.981651376146789, '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}}
Study of internal deformation fields in materials using digital speckle radiography

A method has been developed for visualizing the internal deformation fields in opaque materials during impact events using a combination of flash X-rays and digital speckle analysis. The random speckle pattern required for the digital speckle analysis is achieved by seeding the specimen with a layer of 20% coverage X-ray opaque powder, such as lead. By utilizing flash X-rays a comparison can be made of the images of the random pattern before and during an impact event using speckle pattern analysis software. This allows the displacement field to be determined.