Results 181 to 190 of about 988 (214)

Investigation of Aluminum Agglomeration in AP/HTPB Composite Propellants

44th AIAA Aerospace Sciences Meeting and Exhibit, 2006
Aluminum flame conditions, burning surface structure, and surface regression rate of co mposite propellant laminates of aluminum powder, fine and coarse ammonium perchlorate (AP), and hydroxyl -terminated polybutadiene (HTPB) are experimentally investigated. An aluminum matrix consisting of 15 µm Al powder mixed with fine -AP/HTPB (76:24) is sandwiched
J. Mullen, M. Brewster
openaire   +1 more source

The Damage Law of HTPB Propellant under Thermomechanical Loading

Journal of Energetic Materials, 2015
By way of measuring the acoustic emission (AE) signals of Hydroxyl-terminated polybutadiene (HTPB) propellant in condition of uniform speed, and combined with the scanning electron microscopy (SEM) fracture surface observation, the damage law of HTPB composite solid propellant under thermomechanical loading was studied.
Cheng-wu Liu, Jian-hong Yang, Xian-meng Wang, Yong-kang Ma   +3 more
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Critical impact initiation energies for three HTPB propellants

26th Joint Propulsion Conference, 1990
The instrumented drop weight impact machine is one possible candidate for establishing the hazard response of solid rocket propellants to impact. The plastic work done on the propellant prior to initiation can be measured by equating it to the loss in drop weight kinetic energy, provided energy storage in the machine is negligible.
P. J. Baker, A. M. Mellor, C. S. Coffey
openaire   +1 more source

Ageing Behaviour of HTPB Based Rocket Propellant Formulations

, 2009
The ageing of HTPB propellant formulations containing nanoAl is investigated. During natural ageing the material undergoes a series of slow physico-chemical degradation reactions.
CERRI, SARA, GALFETTI, LUCIANO, M. A. Bohn, K. Menke   +3 more
openaire   +3 more sources

Study on the Fracture Properties of HTPB Propellant at Low Temperature

Propellants, Explosives, Pyrotechnics, 2019
AbstractIn order to study the fracture behaviour of hydroxyl‐terminated polybutadiene (HTPB) propellant, the low temperature fracture toughness experiment of HTPB propellant was carried out by using centrally cracked sheet tensile specimens. The fracture toughness values of HTPB propellant with mode I crack at different temperature and loading rate ...
Bing Long, Hongliang Wang, Shuangsheng Gao   +2 more
openaire   +1 more source

Emission imaging of AP/HTPB propellant sandwich combustion

Combustion Science and Technology, 2002
Ultraviolet emission imaging (305-315 nm) was used to study the combustion of sandwiches of ammonium perchlorate (AP) and hydroxyl-terminated polybutadiene (HTPB) in nitrogen at pressures up to 32 atm, with binder layers from 50 to 450 µm in thickness.
B. T. Chorpening, M. Q. Brewster
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Structure‐property relationship of HTPB‐based propellants. I. Effect of hydroxyl value of HTPB resin

Journal of Applied Polymer Science, 1993
AbstractComposite propellants based on hydroxyl‐terminated polybutadience (HTPB) resin are the most common contemporary solid propellants for launch vehicle and missile applications. A series of HTPB resins, manufactured by free‐radical polymerisation using a peroxide initiator, with varying molecular weights and hydroxyl values, was used in propellant
R. Manjari, V. C. Joseph, L. P. Pandureng, T. Sriram   +3 more
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Aging of HTPB Propellant

41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2005
Moshe Kivity, Gadi Hartman, Abraham Achlama   +2 more
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Aging Characteristics of HTPB Propellant Based on Volume Resistivity

Propellants, Explosives, Pyrotechnics
ABSTRACTHydroxyl‐terminated polybutadiene (HTPB) propellant faces the problem of aging from casting to use. Generally, the aging degree of HTPB propellant is evaluated by a destructive mechanical property test. Therefore, it is necessary to seek a new evaluation method. Electrical performance is a method that can achieve nondestructive testing. However,
Lina Xie, Kaifeng Lin, Wenlong Huo, Xueying Sun, Xuhui Chi, Chengyuan Zhao, Fengtao Zhang, Junzhuo Li, Yulin Yang, Debin Xia, Jian Zhang   +10 more
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Development of HTPB propellants for the SRAM motor

16th Aerospace Sciences Meeting, 1978
L. MCGEE, W. MUNSON, R. WALKER, R. JENSEN   +3 more
openaire   +1 more source