(中国工程物理研究院化工材料研究所, 四川 绵阳 621999)
赵龙(1989-),男,研究实习员,主要从事PBX力学性能研究。e-mail: email@example.com 通信联系人: 周红萍(1977-),女,高级工程师,主要从事PBX力学性能研究。e-mail: firstname.lastname@example.org
(Institute of Chemical Material of China Academy of Engineering Physics, Mianyang 621999, China)
为提高高聚物粘结炸药(PBX)蠕变行为研究的实验效率以便进一步研究其长期服役性能, 探索分析了陈氏法在PBX蠕变特性研究中的适用性。采用陈氏梯级加载法和常规加载法分别对某TATB基PBX材料进行了应力水平为5.5, 11, 16.5, 22 MPa的单轴压缩蠕变实验。采用陈氏数据处理法处理了梯级加载蠕变实验结果, 得到了分别加载下的蠕变曲线, 并与常规加载法得到的蠕变曲线进行了对比。结果表明, 5.5 MPa和11 MPa应力水平下两种方法得到的蠕变曲线是重合的, 但陈氏方法得到的蠕变曲线低于16.5 MPa和22 MPa应力水平下用常规方法得到的蠕变曲线, 这表明陈氏方法可在低应力水平下很好地应用于材料的蠕变实验研究, 可应用于长期服役性能的进一步研究, 在高应力水平下, 观察到了明显的蠕变硬化效果, 陈氏法所得蠕变曲线只有在蠕变变形阶段与真实常见蠕变一致, 而在瞬态弹性变形阶段发生折减。
To improve the experimental efficiency of creep behavior research of polymer bonded explosive (PBX) for the further study of the long-term service performance, the adaptability of Chen′s method in the experimental study of PBX creep behavior was investigated and analyzed. The uniaxial compression creep experiments of a TATB-based PBX material under the stress levels of 5.5, 11, 16.5 MPa and 22 MPa were carried out by Chen′s multistep loading method and separate loading method, respectively. Chen′s data processing method is applied to deal with the creep test results of multistep loading, the creep curves under different loading were obtained, and compared with the creep curves obtained by separate loading method. Results show that creep curves obtained by both methods under the stress levels of 5.5 MPa and 11 MPa are coincident, but the ones obtained by Chen′s method are lower than the ones obtained by separate loading method under the stress levels of 16.5 MPa and 22 MPa, which indicates that Chen′s method can be well applied to the creep experimental study of the material under low stress level, and can be applied to the study of long-term service properties further. While under high stress level, obvious creep hardening effect is observed so that creep curves from Chen method are only in accord with the real separate ones at creep deformation stage but discount occurs in the stage of instantaneous elastic deformation.
赵龙,甘海啸,唐维,等.陈氏法在TATB基PBX蠕变特性研究中的适用性分析[J].含能材料, 2018, 26(7):608-613. DOI:10.11943/j. issn.1006-9941.2018.07.010.
ZHAO Long, GAN Hai-xiao, TANG Wei, et al. Applicability Analysis of Chen′s Method in the Research of TATB-based PBX Creep Behavior[J]. Chinese Journal of Energetic Materials, 2018, 26(7):608-613. DOI:10.11943/j. issn.1006-9941.2018.07.010.