Open hole fatigue testing of laser machined MD-CFRPs

被引：28
|
作者：
Kalyanasundaram, Dinesh [1 ]
Gururaja, Suhasini [2 ]
Prabhune, Prajakta [2 ]
Singh, Dilpreet [1 ]
机构：
[1] IIT, Ctr Biomed Engn, Delhi, India
[2] Indian Inst Sci IISc, Aerosp Engn, Bangalore 12, Karnataka, India
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2018年 / 111卷
关键词：
Polymer-matrix composites (PMCs); Fatigue; CT analysis; Ultrasonics; Machining; FIBER-REINFORCED COMPOSITES; DAMAGE; DELAMINATION; STRENGTH; SPECIMENS; PLASTICS; LIFE; FRPS;
D O I：
10.1016/j.compositesa.2018.05.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of fiber laser machining (FLM) on multi-directional carbon fiber reinforced plastics (MD-CFRP) with [0/90/45/ - 45]s lay-up was studied under tension-tension fatigue with stress ratio R = 0.1 for an open hole fatigue (OHF) test configuration. The FLM parameters were chosen to yield a heat affected zone (HAZ) corresponding to a damage factor of approximately 1.4. The growth of this initial damage under tension-tension fatigue was investigated using digital image correlation (DIC), and damage growth characterization was carried out using scanning acoustic microscopy (SAM) and micro computed tomography (micro-CT). The endurance limit of the MD-CFRPs was evaluated by examining the fatigue life at 70, 50 and 30% of its ultimate tensile strength. Results show a strong correlation of damage mode on the applied load levels like conventionally machined samples.
引用
收藏
页码：33 / 41
页数：9
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