بررسی کهولت سوخت جامد مرکب بر پایه HTPB با روش آنالیز خواص مکانیکی دینامیکی (علمی-پژوهشی)
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بررسی تاثیر ریزساختار HTPB بر کهولت پیشرانه جامد مرکب با استفاده از آزمون دینامیکی مکانیکی
In this article aging behavior of composite solid propellant was investigated by determining its mechanical properties at elevated temperatures. For this purpose, three HTPB samples with different microstructures were selected and composite solid propellants were prepared based on them keeping similar other components and aging was studied by accelerated method. Mechanical properties were meas...
full textبررسی کهولت پیشرانههای جامد مرکب برپایه HTPB
کهولت پیشرانههای جامد مرکب برپایهی HTPB بررسی میشود که یکی از پارامترهای اصلی در ارزیابی طولعمر پیشرانههای مورد استفاده در سامانههای راکتی و موشکی بهشمار میآید. امروزه پیشرانههای جامد مرکب بر پایهی HTPB کارآمدترین پیشرانه برای کاربرد در موتورهای پیشرانه جامد در سراسر جهان هستند. فرایندهای کهولت پیشرانههای جامد مرکب میتواند پیامد فرایندهای شیمیایی، فیزیکی و مکانیکی باشد. در این مقال...
full textاثر مقدار دیمریل دیایزوسیانات بر رفتاررئولوژیکی و خواص مکانیکی یک پیشرانه جامد مرکب بر پایه HTPB
Several parameters affecting the rheological and mechanical properties of solid composite propellants. Among them, the molar ratio of isocyanate (NCO) to hydroxyl (OH) groups (R value) is one of the important factors. In this research, the effects of changing in the weight ratio of dimeryl diisocyanate (DDI) curing agent related to hydroxyl terminated polybutadiene investigated on different pr...
full textبررسی 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...
full textمطالعه پارامترهای موثر بر خواص مکانیکی پیشرانه جامد مرکب بر پایه HTPB/Al/AP
The success of the composite solid propellant motor depends on the proper stress-strain behavior of the propellant grain against tensile, compression and shear stresses and intensive changes in gravity during launch. In this paper, the effect of formulation components and other parameters affecting mechanical properties (tensile strength, elongation and elastic modulus), and their effects AP/Al...
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Journal title
volume 4 issue 1
pages 39- 52
publication date 2009-11
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