高出力レーザー加工を用いた炭素繊維強化複合材料の- 劣化・損傷機構Degradation and Damage Mechanisms of Carbon Fiber Reinforced Plastic
(CFRP) using High-power Laser Cutting ProcessStudent Member
著者:
川井 恭平 Kyohei KAWAI 原田 祥久 Yoshihisa HARADA 鈴木 隆之 Takayuki SUZUKI 寺本 徳郎 Tokuo TERAMOTO 西野 充晃 Michiteru NISHINO 新納 弘之 Hiroyuki NIINO
発刊日:
公開日:
AE analysisCFRPdamage mechanismdegradationfatigue testHAZlaser cuttingmicro X-ray CTtensile test
概要
Carbon fiber-reinforced plastics (CFRP), which is expected to reduce the weight or increase the efficiency of transportations and energy products, was cut by an CO2 gas laser (10.6um, 800W, 20kHz, 8us, 1m/min), CW single-m ode fiber laser (1.07um, 300W, 2000W, CW single-mode, 1m/min, 7m/min) and machining with milling. Although the high-power laser cutting processes make it possible to improve cutting rate of CFRP, the laser-cut specimens cl early showed a thermal damage with a heat-affected zone (HAZ) identified by micro X-ray CT. These specimens were lower tensile strength and fatigue strength than the milling-cut specimen. The Young's modulus in fatigue for laser-cut specimen exhibited large reduction to that of milling-cut specimen, depending on the crack propagation. The acoustic emission analysis was useful to measure the degradation and damage process during fatigue test.
