{'fraction_non_alphanumeric': 0.016241299303944315, 'fraction_numerical': 0.0, 'mean_word_length': 5.488721804511278, '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}}
Soft-recovery of shocked polymers and composites

It is a pressing present objective to understand the mechanical behaviour of polymeric materials, in particular composite systems where plastics are used as the binder phase (such as plastic bonded explosives). A recovery experiment is then required to determine operating mechanisms during shock wave interactions under a global one-dimensional strain state. Previous work in metals has shown that one-dimensional load–unload histories may be approximated under shock conditions to isolate operating mechanisms. This proceeds by using a system of partial momentum traps. This technique is further developed, and it is illustrated how it may be applied to successfully recover polymer targets. A series of experiments and design hydrocode simulations are presented to illustrate the formulation of the technique.