| 雷振坤*,王权,邓立波,周灿林.单纤维与裂纹交互微力学：完整粘接纤维[J].实验力学,2013,28(1):49~55 |
| 单纤维与裂纹交互微力学：完整粘接纤维 |
| Micromechanics of Single Fiber-Crack Interaction: Completely Bonded Fiber |
| 投稿时间：2012-09-11 修订日期：2012-12-03 |
| DOI：10.7520/1001-4888-12-112 |
| 中文关键词: 完整粘接纤维 裂纹与纤维交互 界面应力传递 微拉曼光谱技术 |
| 英文关键词:completely bonded fiber fiber-crack interaction interfacial stress transfer micro-Raman spectroscopy |
| 基金项目:国家自然科学基金(10972047, 11172054)、中央高校基本科研业务费(DUT11LK03)和山东省博士基金(2006BS0415)资助 |
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| 中文摘要: |
| 使用微拉曼光谱技术研究裂纹前喙Kevlar49芳纶纤维交互微力学行为。在建立Kevlar49芳纶纤维轴向变形与拉曼频移线性关系的基础上,通过逐点测量裂尖前喙完整粘接纤维上的应力分布,探讨了裂纹与完整粘接纤维的交互作用,建立了完整粘接纤维上的应力传递模型。I型裂纹切口前方的高应力区造成粘接完好纤维上出现应力集中,应力强度因子KI影响着纤维应力集中长度。 |
| 英文摘要: |
| Micromechanics behavior of completely bonded aramid fiber Kevlar49/crack beak interaction was investigated by micro-Raman spectroscopy. A linear relationship between the Raman frequency shift and axial deformation of single Kevlar 49 aramid fiber was established. Raman measurements show that a stress concentration occurs on the completely bonded fiber ahead a crack. The stress transfer model of the completely bonded fiber/crack interaction was established to explain the fiber stress concentration, which caused by the high stresses near the crack tip. Stress intensity factor KI affects the fiber stress concentration length. |
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