Fatigue failure of prefabricated crack HTPB(hydroxyl-terminated polybutadiene) propellant under strain control.

ABSTRACT: In an effort to elucidate the fatigue behavior of hydroxyl-terminated polybutadiene (HTPB) propellant with prefabricated cracks under strain-controlled conditions, a comprehensive experimental study was conducted employing an MTS fatigue testing machine. The experimental design included four cohorts of specimens: a control group of un-notched specimens and three experimental groups featuring notched specimens with prefabricated cracks oriented at distinct angles (0°, 45°, and 75°) relative to the horizontal. Throughout the duration of the fatigue tests, an infrared thermographic camera was employed to meticulously monitor the temperature variations across the surface of each specimen. The collected data revealed that an escalation in strain amplitude, when subjected to a constant frequency

SUBMITTER: Li G 

PROVIDER: S-EPMC11829010 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature