Solid rocket fuel can experience leaks or structural degradation
Solid rocket propellants and motors can suffer from mechanical degradation, internal defects, cracking, and structural damage during manufacturing and service.
Multiple studies examine mechanical damage, crack propagation, and structural integrity issues in solid propellants, confirming that they can experience degradation and failure.
Zhang H, Liu M, Miao Y, Wang H, Chen T, Fan X, Chang H. Dynamic Mechanical Response and Damage Mechanism of HTPB Propellant under Impact Loading.. 2020. https://doi.org/10.3390/ma13133031
Paper 3 demonstrates that HTPB solid propellants undergo mechanical damage mechanisms such as debonding, matrix tearing, and particle cracking under loading.
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C. Wu, Xuejin Fu, Hongyan Li. Research progress on crack propagation behavior of solid propellant. 2023. https://doi.org/10.56028/aetr.3.1.878
Paper 7 reviews how crack propagation and mechanical degradation in solid propellants can lead to serious operational failures.
Liu K, Yang Q, Cao L, Wang J, Cao P. Numerical Simulation of Failure Modes of Solid Propellants with Internal Cavities Under Various Loading Conditions.. 2026. https://doi.org/10.3390/polym18030404
Paper 9 investigates internal cavity defects and failure modes in solid propellants that compromise structural integrity and cause damage.
Yan B, Lü X, Ding K, Heng Y, Li Y. Embedded Wireless Flexible Sensor for Monitoring Interface Stress of Solid Rocket Motor.. 2026. https://doi.org/10.3390/s26092807
Paper 10 discusses how cracks and interfacial delamination can occur in solid rocket motors due to complex service stresses.
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