Results 201 to 210 of about 52,081 (256)

Constant Strain Aging Model of HTPB Propellant Involving Thermal–Mechanical Coupled Effects

Aerospace
To investigate the aging behavior of HTPB composite solid propellant under constant strain conditions, this study analyzed the aging patterns of the propellant’s maximum elongation at four temperatures (323.15 K–343.15 K) and five strain levels (0–18 ...
Pengju Qin, Xiangyu Zhang, Kai Jiang, Jiming Cheng   +3 more
semanticscholar   +1 more source

Investigation of Fracture Criterion for HTPB Propellant

Advanced Materials Research, 2012
The fracture toughness of HTPB propellant has a significant rate effect. In order to establish a fracture criterion considering rate effect for HTPB propellant, experiments were conducted at different loading rates. Two kinds of specimens were used to get the fracture properties.
Bo Han, Yu Tao Ju, Chang Sheng Zhou
openaire   +1 more source

Infrared imaging of AP/HTPB laminate propellant flames

Combustion and Flame, 2008
Abstract The combustion of ammonium perchlorate (AP), hydroxyl-terminated polybutadiene (HTPB) two-dimensional laminate propellants is investigated using simultaneous infrared (IR) and ultraviolet (UV) emission imaging at 1–50 atm. The IR (3300–3900 nm) measurements sense flame presence nominally via HCl rovibrational excitation and the UV (310 nm ...
R.P. Fitzgerald, M.Q. Brewster
openaire   +1 more source

A model for the combustion behavior of AP/HTPB propellant containing ultrafine aluminum

Propellants, explosives, pyrotechnics
Nano‐aluminum, renowned for its remarkable efficacy in augmenting propulsion efficiency and regressive velocity, stands out as a compelling choice for incorporation into heterogeneous propellant compositions.
Kaixuan Chen, Xiaochun Xue, Yonggang Yu
semanticscholar   +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
openaire   +1 more source

Insights into the Fragmentation of Aluminum Hydride and Its Effect on Combustion and Agglomeration of HTPB Propellant.

ACS Applied Materials and Interfaces
AlH3 has gained considerable attention as a fuel additive due to its ability to offer high specific impulse and superior combustion performance. However, few studies have focused on the fragmentation and agglomeration behavior of AlH3.
Zhoufeng Jiang, Fengqi Zhao, Zhao Qin, Yi Xu, Ying Wang, Yi-Fan Jiang, Ting An, Wengang Qu, Ming Zhang, Hexin Liu, Bingbing Zhang, Lianghua Xiong   +11 more
semanticscholar   +1 more source

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

Development of HTPB Propellant for Ballistic Missiles

1974
Abstract : The program objective is to develop a family of solid propellants for ballistic missiles based on an HTPB (hydroxyl terminated polybutadiene) binder, and to demonstrate one optimized propellant formulation by large scale motor firings. Specifically, five propellants have been formulated and are being characterized to the point that they will
Even E. Day, Grant Thompson
openaire   +1 more source

Self-Heating Effect of HTPB Propellant during Fatigue

2019 IEEE 10th International Conference on Mechanical and Aerospace Engineering (ICMAE), 2019
In order to better interpret the thermomechanical coupling of solid propellant (in this case, HTPB propellant) under cyclic loading, a series of experiments have been accomplished by monitoring the mechanical and thermal responses of tested specimens under constant room temperature. The results reveal that the area and shape of the hysteresis loop, the
Xin Tong, Issam Doghri, Jin-sheng Xu, Xiong Chen   +3 more
openaire   +1 more source

Effect of RDX content on the agglomeration, combustion and condensed combustion products of an aluminized HTPB propellant

, 2020
Cyclotrimethylene trinitramine (RDX) is widely used in aluminized solid propellants to increase specific impulse. Experimental investigations on the effect of RDX content on the propellant combustion and agglomeration were thoroughly conducted based on ...
Huan Liu, W. Ao, Q. Hu, Peijin Liu, Songsong Hu, Lin-lin Liu, Yang Wang   +6 more
semanticscholar   +1 more source