钻井过程参数对玻璃纤维/网增强环氧复合材料承载强度的影响
Amr Seif1, A Fathy2,3, A A Megahed2
1Mechanical Design and Production Engineering Department, Faculty of Engineering, Zagazig University, P. O. Box 44519, Zagazig, Al-Sharqia, Egypt. aseifeldean@eng.zu.edu.eg.
Scientific reports
|July 26, 2023
概括
这项关于玻璃纤维增强聚合物 (GFRP) 复合材料的研究发现,钻孔点角度显著影响轴承强度. 整洁的GFRP标本表现出最高的承载强度,而网配置显示出不同的结果.
科学领域:
- 材料科学 材料科学 材料科学
- 制造业 工程 制造工程
- 复合材料 复合材料 复合材料
背景情况:
- 玻璃纤维增强聚合物 (GFRP) 复合材料广泛应用于各种行业.
- 了解钻探对复合材料性能的影响对于结构完整性至关重要.
- 结合线网的混合复合材料提供了提高性能的潜力.
研究的目的:
- 评估钻井参数和分层对整洁GFRP和混合GFRP/丝网复合材料承载强度的影响.
- 为了比较两种混合配置的轴承强度:外表面 (AG) 和核心 (GA) 的网.
- 为了确定不同钻头角,速度和料对轴承强度和分层的影响.
主要方法:
- 在干净的GFRP (NG),AG和GA标本上进行了钻探实验,使用6毫米碳化物扭转钻.
- 参数有所变化,包括钻头角 (90°,120°,135°),转速 (1000-3000rpm) 和料 (20-60mm/min).
- 使用塔古奇和ANOVA分析来分析处理参数的影响,并开发回归模型.
主要成果:
- 在AG样品配置中,分层损伤最小.
- 清洁的GFRP (NG) 标本显示出最高的承载强度,分别超过AG和GA标本9.6%和8.7%.
- 钻孔点角度是影响AG和GA标本轴承强度的主要因素,而NG标本的料速度是最有影响的.
结论:
- 钻孔参数显著影响GFRP和混合GFRP/复合材料的承载强度和分层.
- 线网的配置会影响分层阻力和整体承载强度.
- 优化钻孔点角度和料速度对于最大限度地提高特定复合材料类型的轴承强度至关重要.
相关概念视频
Fiber Reinforced Concrete
102
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
102
Tensile Strength Considerations of Concrete
151
Considering the tensile strength of concrete involves recognizing that the theoretical strength of cement paste can be up to a thousand times higher than what is observed in practical applications. This significant discrepancy is largely attributed to the presence of microscopic cracks within the concrete. These cracks tend to amplify stress at their tips when a load is applied, a phenomenon explained by Griffith's theory of brittle fracture.
The dimensions and shape of a concrete specimen...
The dimensions and shape of a concrete specimen...
151
Impact Strength of Concrete
239
Impact strength in concrete is a critical measure that reflects the material's capability to endure the forces applied during pile driving and when supporting machinery foundations that experience impulsive loads. It is also essential when handling precast concrete components to prevent accidental damage. The impact strength is assessed by observing the concrete's resistance to repeated impacts and energy absorption capacity. A key indicator of significant damage to concrete is when it...
239
Bonding and Strength of Aggregate
217
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
217


