在CFRP/Ti堆的钻井中对加工损坏进行步骤钻孔结构的数值研究
Chen Chen1, Qing Zhao1, Aixu Wang1
1Naval Architecture and Ocean Engineering College, Dalian Maritime University, Dalian 116026, China.
Materials (Basel, Switzerland)
|September 9, 2023
概括
最佳的阶段钻孔比 (k=0.6) 在碳纤维增强聚合物/ (CFRP/Ti) 堆加工中最大限度地降低了孔高度和孔径偏差. 这种比率也减少了孔壁缺陷,使其适合钻探这些复合材料.
科学领域:
- 材料科学与工程 材料科学与工程
- 制造过程 制造过程 制造过程
- 复合材料加工 复合材料加工
背景情况:
- 工具结构显著影响碳纤维增强聚合物/ (CFRP/Ti) 堆的加工过程中的损伤.
- 仅靠实验方法就无法完全理解这些堆中复杂的洞损伤形成过程.
- 有限元模拟提供了一种强大的方法来克服实验约束,并调查加工引起的损害.
研究的目的:
- 建立一个数值模拟模型,用于研究CFRP/Ti堆中阶段钻孔结构和孔损伤之间的关系.
- 分析阶段钻孔直径比 (k) 对Ti层口高度,CFRP分层,孔径偏差和孔面缺陷的影响.
主要方法:
- 开发一个有限元模拟模型来模拟CFRP/Ti堆的钻井过程.
- 参数研究改变了初级钻头直径与二次钻头直径 (k) 的比率.
- 评估关键损坏指标:孔高度,分层系数,孔径偏差和孔壁缺陷.
主要成果:
- 洞口的Ti层口高度最初下降,然后随着k的上升而增加,在k=0.6.6时观察到的最小值.
- 由于Ti支,CFRP的分层增加了k (2.57%从k=0.4到1.0),但由于Ti支,阶段钻孔结构对其的影响很小.
- 孔径尺寸偏差遵循类似的趋势,随着k的增加而减少,然后随着k的增加而增加,在k=0.6.6时达到2.09μm的最低值. 洞壁缺陷也在k=0.6.6时得到最小化.
结论:
- 一个直径比 (k) 为0.6的阶段钻被确定为最优的,以最大限度地减少CFRP/Ti堆的孔损伤.
- 这些发现为优化钻井参数提供了关键的见解,以提高加工的CFRP/Ti元件的质量和完整性.
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