Variation of Electro-Conductive Property of SSF/PA6 System under Impact Loading using a Modified SHPB
Variation of Electro-Conductive Property of SSF/PA6 System under Impact Loading using a Modified SHPB
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DOI：
10.1177/0967391112020001-209
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发表时间：
2012-02
影响因子：
2.1
通讯作者：
J. Lei;Jian-kang Chen;Ming-hua Zhang
中科院分区：
文献类型：
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作者：
J. Lei;Jian-kang Chen;Ming-hua Zhang
为了检测短钢纤维（SSF）填充的聚酰胺6（PA6）在冲击载荷下导电性能的变化，提出了一种改进的分体式霍普金森压力棒（M-SHPB）。这种M-SHPB是通过设计一个新的测试电路并将其连接到样本和示波器来构建的。另一方面，在整个SHPB设备上设计并放置了铜箔盖，以避免测试环境中存在的电磁波的干扰。通过M-SHPB，可以有效检测电阻与动应力或动应变之间的关系。实验结果表明，材料的电阻随着应变或应力的增加而降低。电阻的敏感变化出现在材料变形开始时。
In order to detect the variation of electro-conductive property of short steel fiber (SSF) filled polyamide-6 (PA6) under impact loading, a modified split Hopkinson pressure bar (M-SHPB) is suggested. Such M-SHPB is constructed by designing a new test electrocircuit, and connecting it to the specimen and oscillograph. On the other hand, a copper foil cover is designed and placed on the whole SHPB equipment for avoiding interference of electromagnetic wave existing in the testing environment. By means of M-SHPB, the relation between the resistance and dynamic stress or dynamic strain is effectively detected. The experimental results indicate that the resistance of the material decreases with the increase of strain or stress. The sensitive variation of the resistance appears at the beginning of the deformation of the material.