Shearing Mechanism of Straight Thin Copper Wires at Connecting Terminal due to Lightning Current  

作　　者：胡小博 Takahiro OTSUKA Toru IWAO Tsuginori INABA 

机构地区：[1]Chuo University,Tokyo 112-8551,Japan [2]Toko Electric Corporation,Saitama 349-0192,Japan [3]Musashi Institute of Technology,Tokyo 158-8557,Japan

出　　处：《Plasma Science and Technology》2007年第6期752-755,共4页等离子体科学和技术（英文版）

摘　　要：When a lightning current is impressed through a copper wire, the copper wire would be melted. A straight thin copper wire with a diameter of 0.1 mm,~ is melted due to the specific melting Joule heating （j^2t）m in an adiabatic condition. However, it has been recognized in the experiment that the thicker copper wires of φ1 mm are not completely melted, but sheared mainly at the connecting terminal by a relatively low impulse current. Electro-magnetic mechanical shearing stress, etc. are discussed in addition to the conventional Joule heating. New broken mechanisms were presumed and proved in the additional experiments.When a lightning current is impressed through a copper wire, the copper wire would be melted. A straight thin copper wire with a diameter of 0.1 mm,~ is melted due to the specific melting Joule heating （j^2t）m in an adiabatic condition. However, it has been recognized in the experiment that the thicker copper wires of φ1 mm are not completely melted, but sheared mainly at the connecting terminal by a relatively low impulse current. Electro-magnetic mechanical shearing stress, etc. are discussed in addition to the conventional Joule heating. New broken mechanisms were presumed and proved in the additional experiments.

关 键 词：LIGHTNING copper wire broken 

分 类 号：O441[理学—电磁学]