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首页> 外文会议>International Conference on Composite Materials: Extended Abstracts >IMPACT OF ND-YAG LASER DRILLING ON THE; FATIGUE CHARACTERISTICS OF APC-2A/AS4; THERMOPLASTIC COMPOSITE MATERIAL
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IMPACT OF ND-YAG LASER DRILLING ON THE; FATIGUE CHARACTERISTICS OF APC-2A/AS4; THERMOPLASTIC COMPOSITE MATERIAL

机译：ND-YAG激光钻探对钻孔的影响; APC-2A / AS4的疲劳特性;热塑性复合材料

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Both carbon fibre thermoset and thermoplastic materials can be drilled using a laser. This, however, results in significant damage to the material, but the extent to which this would reduce the fatigue life was not known. Studies were conducted to evaluate this for an aerospace application, which required a light-weight, but perforated, skin panel through which air could be sucked. The objective was to determine the impact on the fatigue life of quasi-isotropic APC-2A/AS4 due to Nd-YAG laser drilled holes (～120μm diameter, spaced ～500μm apart). Static tensile tests indicated a 29% reduction in strength. The maximum stress versus cycles to failure (S-N) relationship was represented by a power law function: S = KN{sup}m. The laser drilling was seen to reduce the value of K (coefficient of fatigue strength), but the value of m (fatigue strength degradation exponent), which was determined from non-perforated specimens, was unchanged.
机译：可以使用激光钻出碳纤维热固性和热塑性材料。然而，这导致材料损害显着损害，但这将不知道这将减少疲劳寿命的程度。进行研究以评估这一点的航空航天应用，这需要轻量度，但穿孔的皮肤面板，通过它可以吸入空气。目的是根据ND-YAG激光钻孔（直径为120μm，分开间隔〜500μm），确定对准各向同性APC-2A / AS4的疲劳寿命的影响。静态拉伸试验表明强度降低了29％。失败的最大应力与失败（S-N）关系的循环由电力法函数表示：s = kn {sup} m。看到激光钻孔被视为降低k的值（疲劳强度的系数），但是从非穿孔标本确定的m（疲劳强度降解指数）的值不变。

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