وجدی, محمدرضا
دانشگاه جامع امام حسین (ع)
[ 1 ] - بررسی پارامترهای موثر بر کهولت پیشرانه‌‌های جامد مرکب بر پایه‌ی HTPB
HTPB based composite Solid propellants are the source of power for the propulsion of rockets and missiles. Since composite solid rocket propellants, used in rockets and missiles is the fastest degrading component of the complete system, shelf life of the system is mainly governed by the life of the propellants. During storage and transportation, the propellant grains are subjected to various co...
[ 2 ] - بررسی کهولت پیشرانه‌ی جامد مرکب بر پایه‌ی HTPB با استفاده از روش وان‌هوف
In this article the aging of HTPB based composite solid propellants have been studied by Van’t Hoff method. The F-factor of Van’t Hoff equation was calculated by dynamic mechanical analysis (DMA) for reference propellants sample that was equal 2.5. Then the accelerated aging program conditions have been determined by Van’t Hoff equation. According to accelerated aging program the reference prop...
[ 3 ] - بررسی اثر نسبت عامل پخت بر استحکام کششی و چسبندگی لاینر بر پایه‌ی HTPB
Nowadays solid propellant motors (SRMs) are widely used because of simple structure and reliability. One of the requirements in SRMs is high tensile and bonding strength of liner for integrity of grain structure and neutralizes stresses applying to motor. In this research, effect of curing agent ratio (NCO/OH) in the range of (R=0.9-1.4) on tensile strength of liner and bonding strength of line...
[ 4 ] - بررسی اثر افزایش عامل گستراننده زنجیر و پرکننده‌ها بر استحکام کششی و چسبندگی لاینر بر پایه‌ی HTPB
Solid propellant systems are basically two types: case bonded and cartridge. Liner, a polymeric glue, is responsible for bonding propellant to casing in case bonded ones. Therefore, it must have sufficient mechanical and adhesive strength. The type and amount of each component of polymeric composition plays an important role in liner strength. In this research, effect of chain extender content ...
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