聚碳酸酯压缩力学性能实验研究  

Research on Compression Mechanical Properties of Polycarbonate

作　　者：穆磊金 胡文军[2] 陶俊林[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010 [2]中国工程物理研究院,四川绵阳621000

出　　处：《四川理工学院学报（自然科学版）》2017年第2期49-52,共4页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：国家自然科学基金(11272300)

摘　　要：聚碳酸酯(PC)是一类玻璃态非晶聚合物材料,由于其出色的耐热和抗冲击性能,被广泛地应用于国防军事和工业领域。为获得聚碳酸酯的压缩力学性能,采用MTS810材料实验机和分离式Hopkinson压杆实验装置,对聚碳酸酯进行了准静态压缩试验和动态压缩试验,获得了聚碳酸酯在10-4s-1~103s-1应变率范围内应力应变曲线,分析应变率对聚碳酸酯屈服应力的影响规律。结果表明:聚碳酸酯在压缩时,随着应变率的增大屈服应力逐渐增大,在不同应变率范围内,屈服应力与对数应变率关系可以用二次函数和线性关系描述;与静态压缩相比,动态压缩软化效应减弱,而被随后而至的强化效应所取代,表明高应变率下应变软化和应变硬化存在竞争趋势。Polycarbonate （PC） is a kind of glassy amorphous polymer material, which has been widely used in the field of national defense military and industrial areas because of its excellent heat resistance and impact resistance. For the compression mechanical properties of polyearbonate, MTS810 material testing machine and SHPB experiments were carried out by the apparatus of the quasi-static compression test and dynamic test of polyearbonate. The stress-strain curves of polyearbonate in the strain range of 104 S-1 to l03 s-1 were obtained, and the effect of strain rate on the yield stress was analyzed. The results show that the polycarbonate in compression, with the increase of strain rate of yield stress inereaseing at different strain rate range, yield stress and logarithmic strain rate can be described by quadratic function and linear relationship; compared with the static compression, dynamic compression softening effect was weakened, and the strengthening effect was followed by instead, indicating the existence of competition trend of softening and strain hardening at high strain rate and strain.

关 键 词：分离式霍普金森压杆 力学性能 准静态压缩 动态压缩 聚碳酸酯 

分 类 号：O341[理学—固体力学] TB301[理学—力学]