Elements of solid rocket service life prediction

Kelley, F. N.; Trout, Joseph

doi:10.2514/6.1972-1085

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Automatic control band saws were used to cut SRMs in the Fraunhofer Institute laboratory [5] in Germany and the TNO Prins Maurits laboratory [6] in the Netherlands. Electrochemical corrosion was applied to dissect metal case motors in the United States [7][8][9][10][11]. A method was used to dissect a full-scale rocket motor to estimate the service life in India [12].…”

Section: Presentation Of the Methodology Usedmentioning

confidence: 99%

Dissection Method of Solid Rocket Motor Chamber Based on Ultrasonic Vibration Sawing

Shen

et al. 2021

Propellants Explo Pyrotec

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Overall dissection and in situ sampling are the most direct and reliable ways to obtain the storage performance degradation of solid rocket motors. However, mechanical cutting poses serious safety risks because grains are regarded as a chemical product. Ultrasonic vibration sawing of diamond wires can be performed in a wide variety of materials. Moreover, this mechanism has a low cutting force and a high cutting precision, produces narrow slits and leads to a low rise in cutting temperature. Thus, this method has application prospects in comprehensive engine dissection. In this work, the main material physical characteristics of the chamber of a nonmetallic case motor were analysed. A four‐parameter orthogonal experimental study with an infrared temperature measurement as the control parameter was conducted. The safety parameters during the shell cutting were preliminary determined. The cutting temperature inside the solid propellant block was measured with an embedded microthermocouple. The cutting process parameters were then checked. The safety of the method was further verified by simulating the motor chamber via an integrated sawing test. Results showed that the ultrasonic vibration sawing method has the advantages of fast cutting speed, low increase in cutting temperature, produces a flat cutting surface and does not lead to stratification in the cutting interface when dissecting the chamber of the nonmetallic case motor. Moreover, this method has potential applications in the engineering practice of storage life research in solid rocket motors.

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Section: Presentation Of the Methodology Usedmentioning

confidence: 99%

Dissection Method of Solid Rocket Motor Chamber Based on Ultrasonic Vibration Sawing

Shen

et al. 2021

Propellants Explo Pyrotec

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Instrumented rocket motor service life program

Francis¹,

Ho²

1995

36th Structures, Structural Dynamics and Materials Conference

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The paper describes a Solid Propellant Rocket Motor Service Life program conducted at the Aeronautical and Maritime Research Laboratory1 DSTO in Australia, which combined a nonlinear viscoelastic analysis of an Australian Pictor motor and used miniature embedded stress transducers to confirm analysis or define the actual stresses in the rocket motor during thermal cycling, cooling, storage and motor processing conditions. The measured stresses during solid propellant rocket motor processing, cure, cooldown, thermal cycling and accelerated and ambient ageing were obtained for comparison with linear elasticlviscoelastic and nonlinear viscoelastic finite element analysis. Measurements are in reasonable agreement with nonlinear viscoelastic analysis for most motor loading conditions.

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Elements of solid rocket service life prediction

Cited by 2 publications

References 5 publications

Dissection Method of Solid Rocket Motor Chamber Based on Ultrasonic Vibration Sawing

Dissection Method of Solid Rocket Motor Chamber Based on Ultrasonic Vibration Sawing

Instrumented rocket motor service life program

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