Results 21 to 30 of about 914 (263)

Mechanical properties of thermal aged HTPB composite solid propellant under confining pressure

open access: yesDefence Technology, 2022
With the purpose of investigating the effects of confining pressure and aging on the mechanical properties of Hydroxyl-terminated polybutadiene (HTPB) based composite solid propellant, tensile tests of thermal accelerated aged propellant samples under ...
Zhe-jun Wang, Hong-fu Qiang
doaj   +1 more source

Strength criterion of composite solid propellants under dynamic loading

open access: yesDefence Technology, 2018
Based on the dynamic loading (1-100 s−1) experiments under different temperatures (223–298 K) and stress states, uniaxial and biaxial strength criterion of a Hydroxyl-terminated polybutadiene (HTPB) based composite solid propellant were further ...
Zhe-jun Wang   +3 more
doaj   +1 more source

Combustion Characteristics of Nanoaluminium-Based Composite Solid Propellants: An Overview

open access: yesJournal of Chemistry, 2021
The nanosized powders have gained attention to produce materials exhibiting novel properties and for developing advanced technologies as well.
Kandasamy Jayaraman   +4 more
doaj   +1 more source

Cu–Co–O nano-catalysts as a burn rate modifier for composite solid propellants

open access: yesDefence Technology, 2016
Nano-catalysts containing copper–cobalt oxides (Cu–Co–O) have been synthesized by the citric acid (CA) complexing method. Copper (II) nitrate and Cobalt (II) nitrate were employed in different molar ratios as the starting reactants to prepare three types
D. Chaitanya Kumar Rao   +2 more
doaj   +1 more source

Macroscopic and mesoscopic properties of HTPB propellant under low temperature dynamic biaxial compression loading

open access: yesPolymer Testing, 2023
In order to study the macroscopic mechanical properties and meso damage mechanism of solid fuel hydroxy-terminated polybutadiene (HTPB) propellant under low temperature and dynamic biaxial compression loading, the INSTRON high strain rate hydraulic ...
Tingjing Geng   +5 more
doaj   +1 more source

Performance evaluation of commercial copper chromites as burning rate catalyst for solid propellants [PDF]

open access: yesJournal of Aerospace Technology and Management, 2010
Copper chromites are well known as burning rate catalysts for the combustion of composite solid propellants, used as a source of energy for rocket propulsion.
Milton Faria Diniz   +5 more
doaj  

Translating whole‐genome doubling into precision medicine in cancer

open access: yesMolecular Oncology, EarlyView.
Whole‐genome doubling creates a WGD‐positive tumor state characterized by persistent chromosomal instability, karyotypic diversification, and cellular stress. These same biological pressures drive aggressive tumor evolution while exposing therapeutic vulnerabilities, providing a rationale for WGD‐informed precision medicine. Whole‐genome doubling (WGD)
Sejung Lee, Junghyeok Lim, Jinhyuk Bhin
wiley   +1 more source

Analysis on damage characteristics and detonation performance of solid rocket engine charge subjected to jet

open access: yesDefence Technology, 2022
To further explore the damage characteristics and impact response of the shaped charge to the solid rocket engine (SRE) in storage or transportation, protective armor was designed and the shelled charges model (SCM)/SRE with protective armor impacting by
Song-lin Pang   +4 more
doaj   +1 more source

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

open access: yesAdvanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Microstructure‐Controlled Crack Propagation and Fracture Resistance in MoSiBTiC Alloy Revealed by Multiscale Extended Finite Element Method Modeling

open access: yesAdvanced Engineering Materials, EarlyView.
A two‐dimensional multiscale finite element analysis framework was established for the first‐generation MoSiBTiC alloy, and the mechanical and fracture‐related parameters of the constituent phases were calibrated through experiments and simulations. The framework provides a basis for analyzing crack propagation behavior in its complex microstructure ...
Junfeng Du   +4 more
wiley   +1 more source

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