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Fracture toughness of nitramine and composite solid propellants

机译:硝胺和复合固体推进剂的断裂韧性

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摘要

Test results of compact tension (CT) specimens, are presented for fracture toughness evaluation of nitramine (in extruded and slurry cast conditions) and composite solid propellants. For notched strength evaluation of cracked configurations, failure assessment diagram is generated utilizing the inherent flaw model. Testing of solid propellant CT specimens need specialized facilities as the spring force of the clip-on type crack opening displacement (COD) gauge, generally used for metallic materials, is high enough to open-up the crack even before commencement of actual test. Therefore, a non-contacting type video extensometer was employed. Fracture toughness of the extruded nitramine propellant is found to be higher, compared to those of slurry cast nitramine and composite propellants.
机译:给出了紧凑张力(CT)试样的测试结果,用于评估硝胺(在挤压和浆料浇铸条件下)和复合固体推进剂的断裂韧性。对于裂纹配置的缺口强度评估,利用固有缺陷模型生成失效评估图。固体推进剂CT标本的测试需要专门的设备,因为通常用于金属材料的夹式裂缝开口位移(COD)量规的弹力足够大,甚至可以在开始实际测试之前就打开裂缝。因此,采用了非接触式视频引伸计。发现与浆态铸造的硝胺和复合推进剂相比,挤出的硝胺推进剂的断裂韧性更高。

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