Results 21 to 30 of about 10,802 (309)

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

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

Numerical Modeling of Tank Cars Carrying Hazardous Materials With and Without Composite Metal Foam

open access: yesAdvanced Engineering Materials, EarlyView.
Large‐scale puncture models consisting of hazardous materials (HAZMATs) tank car with protective steel–steel composite metal foam (S–S CMF) are solved numerically. Tank car plate with added 10.91–13.33 mm thick S–S CMF layer does not puncture. Protective S–S CMF absorbs impact energy, reduces plate deformation, and prevents shear bands formation ...
Aman Kaushik, Afsaneh Rabiei
wiley   +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

Численное исследование зажигания смесевого топлива горячей частицей при неидеальном тепловом контакте [PDF]

open access: yes, 2015
The mathematical model of the solid-phase condensed substance ignition by a metal particle heated to high temperatures in disk-shape was developed under the imperfect thermal contact conditions on the particle - composite propellant border, caused by a ...
Вершинина, Ксения Юрьевна   +1 more
core  

A Surface‐engineered Microfluidic Device for Antibody‐Mediated Negative Selection of High‐Quality Sperm for Assisted Reproduction

open access: yesAdvanced Functional Materials, EarlyView.
This study reports a microfluidic device with a functionalized surface utilizing a polyoxazoline coating and covalently immobilized gold nanoparticles and anti‐phosphatidylserine antibody. The device efficiently eliminates pre‐apoptotic and apoptotic spermatozoa and yields sperm with substantially improved quality and low DNA damage, offering a simple ...
Soraya Rasi Ghaemi   +5 more
wiley   +1 more source

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