HTPB推进剂热力耦合老化力学性能研究

推进技术 ›› 2016, Vol. 37 ›› Issue (10): 1984-1990.

HTPB推进剂热力耦合老化力学性能研究

程吉明¹,李进贤¹,侯晓²,沙宝林²

西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,西北工业大学燃烧、热结构与内流场重点实验室，陕西西安 710072,中国航天科技集团公司第四研究院，陕西西安 710025,中国航天科技集团公司第四研究院，陕西西安 710025

发布日期:2021-08-15
作者简介:程吉明，男，博士生，研究领域为固体推进剂贮存性能。

Aging Mechanical Properties of HTPB Propellant Under

Science and Technology on Combustion，Internal Flow and Thermo-Structure Laboratory， Northwestern Polytechnical University，Xi’an 710072，China,Science and Technology on Combustion，Internal Flow and Thermo-Structure Laboratory， Northwestern Polytechnical University，Xi’an 710072，China,The Fourth Academy of CASC，Xi’an 710025，China and The Fourth Academy of CASC，Xi’an 710025，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究预应变对复合固体推进剂老化性能的影响，针对HTPB复合固体推进剂开展了70℃热力耦合加速老化试验，通过单轴拉伸力学性能测试及拉伸断面扫描电镜试验研究了不同预应变作用下HTPB推进剂的老化性能。结果表明:在试验预应变范围内(≤15%)，无论预应变水平多大，随老化时间的延长，粘合剂基体的氧化交联反应是HTPB推进剂的主要老化机理；在相同老化时间，预应变对HTPB推进剂力学性能的影响存在一个损伤阈值，当预应变超过该阈值时，拉伸断面中AP颗粒/粘合剂基体界面“脱湿”及粘合剂基体撕裂损伤现象明显。

关键词: HTPB推进剂；老化；力学性能；耗散能密度

Abstract: In order to understand how pre-strain affects the aging mechanical properties of composite solid propellant，the accelerated aging tests of HTPB (hydroxy-terminated polybutadiene binder)propellant under the interaction of thermal and pre-strain were carried out at 70℃. The aging properties of HTPB propellant at different pre-strain levels were researched through uniaxial tensile tests and scanning electron microscope (SEM) experiments of tensile fracture surfaces. The results show that the oxidative crosslinking reaction of binder matrix is the major aging mechanism of HTPB propellant at researched pre-strain range (≤15%) regardless of different pre-strain levels. At the same aging time，there is a critical pre-strain value that affects the mechanical properties of HTPB propellant. When the aging pre-strain is higher than the critical pre-strain value，the dewetting phenomenon of AP and HTPB matrix bonding interface and the tearing damage phenomenon of binder matrix is evident in tensile fracture surface.

Key words: HTPB propellant；Aging；Mechanical properties；Dissipated energy density

程吉明,李进贤,侯晓,沙宝林. HTPB推进剂热力耦合老化力学性能研究[J]. 推进技术, 2016, 37(10): 1984-1990.

CHENG Ji-ming¹,LI Jin-xian¹,HOU XiaO²,SHA Bao-lin². Aging Mechanical Properties of HTPB Propellant Under[J]. Journal of Propulsion Technology, 2016, 37(10): 1984-1990.

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