摘要
为了探讨加载方式对高聚物粘结炸药(PBX)巴西试验结果的影响,对某PBX炸药分别进行了传统巴西试验、30°圆弧巴西试验和橡胶垫巴西试验,得到的间接拉伸强度分别为3.57,5.22,5.48 MPa,与此PBX炸药的直接拉伸试验强度值5.50 MPa相比,只有橡胶垫巴西试验结果与直接拉伸强度最接近。传统巴西试验和30°圆弧加载试验曲线为无效加载曲线,而橡胶垫加载巴西试验曲线为有效加载曲线。在传统巴西试验和圆弧加载巴西试验样品的加载区域除了主裂纹以外还存在一条或多条裂纹,而橡胶垫加载巴西试验样品只有一条主裂纹,没有其它次裂纹。表明,橡胶垫巴西试验方法更适合于测试PBX炸药的拉伸强度。
To investigate the effects of loading methods in Brazilian Test on tensile strength for the PBX,traditional Brazilian Test,arc Brazilian Test and rubber-cushion Brazilian Test were conducted for PBX specimens,and the corresponding tension strengths was 3.57 MPa,5.22 MPa and 5.48 MPa respectively.Compared with the tension strength of 5.5 MPa by standard tensile test,the rubber-cushion Brazilian test shows same result.The load-displacement curves of the traditional Brazilian test and the arc Brazilian test were invalid,but the load-displacement curve of rubber-cushion Brazilian test was valid.Small cracks appear at loading contact zones besides the leading cracks through samples by the traditional Brazilian test and the arc Brazilian test,but there was only one diametrical crack by the rubber-cushion Brazilian test.It indicates that the rubber-cushion Brazilian test estabilished by this work is better to measure the tensile strength of the PBX than the other Brazilian test methods.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2012年第2期205-209,共5页
Chinese Journal of Energetic Materials
基金
国家自然科学基金资助(批准号:10832003)
