使用磁记录方法进行拉伸应力加载GFRP的非破坏性评估
Ryszard D Łukaszuk1, Tomasz Chady2, Marek J Żwir3
1Doctoral School, West Pomeranian University of Technology, 70-313 Szczecin, Poland.
Materials (Basel, Switzerland)
|January 11, 2024
概括
一种经过修改的磁记录方法 (MRM) 成功检查了非磁性玻璃纤维增强聚合物 (GFRP) 复合材料的拉力应力. 该技术通过分析附着的铁磁条上的磁模式变化来量化应用负载.
科学领域:
- 材料科学与工程 材料科学与工程
- 非破坏性测试是指非破坏性测试.
- 复合材料 复合材料 复合材料
背景情况:
- 磁性记录方法 (MRM) 传统上仅限于铁磁材料.
- 在压力下检查玻璃纤维增强聚合物 (GFRP) 等非磁性复合材料需要适应的NDT技术.
- 现有的方法可能缺乏准确评估复合结构负载的精度.
研究的目的:
- 调整磁性记录方法 (MRM) 用于评估非磁性GFRP复合材料的拉伸应力.
- 评估修改后的MRM的可行性和准确性,以进行非破坏性压力监测.
- 确定GFRP应用负载和磁性模式变化之间的定量关系.
主要方法:
- 一个经过修改的MRM涉及将铁磁钢条 (DC01) 粘合到GFRP样本上,使用环氧粘合剂.
- 使用一系列永久磁铁,在钢带上印制了一个正弦形磁纹图案.
- 在应用静态拉伸应力之前和之后测量了残余磁化,并对RMS值进行了统计分析.
主要成果:
- 施加的拉力应力诱导了正弦磁化模式的幅度的可测变化.
- 频率变化很小,并没有用于GFRP样本的评估.
- 对RMS值的统计分析提供了关于最大0.6%的菌株应用负载的明确和准确信息.
结论:
- 修改后的MRM是一种可行且准确的技术,用于监测非磁性GFRP复合材料的拉伸应力.
- 该方法提供了一种可靠的方式来评估应用负载的非破坏性.
- 这种调整将MRM的应用扩展到更广泛的复合材料中.
相关概念视频
01:18Mechanical Characteristics of Steel
577
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
577
01:10Stress-Strain Diagram
661
A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This...
661
01:27Measurements of Strain
854
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
854