基于羔羊波波模式控制的CFRP曲板的分层损害量化检测研究
Quanpeng Yu1, Shiyuan Zhou1, Yuhan Cheng1
1School of Mechanical Engineering, Beijing Institute of Technology, No. 5, Zhongguancun South Street, Haidian District, Beijing 100081, China.
Sensors (Basel, Switzerland)
|March 28, 2024
概括
这项研究引入了信号差异系数 (SDC) 来检测使用Lamb波的碳纤维增强聚合物 (CFRP) 结构中的分层损伤. A0模式的Lamb波显示出更高的灵敏度,使损坏大小的精确量化能够在最小的误差下实现.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 非破坏性测试是一种非破坏性测试.
背景情况:
- 碳纤维增强聚合物 (CFRP) 曲结构在航空领域至关重要.
- 分层破坏损害了这些结构的安全性和完整性.
- 基于Lamb波的方法为损坏检测提供了高灵敏度.
研究的目的:
- 引入一个信号差系数 (SDC) 来量化CFRP的分层损伤.
- 为了评估A0模式和S0模式Lamb波对分层的灵敏度.
- 开发一种选择性激发Lamb波模式以检测损伤的方法.
主要方法:
- 模拟的Lamb波传播和损伤相互作用.
- 引入了信号差异系数 (SDC) 用于损害量化.
- 采用线性数组 PZT 阶段时间延迟方法进行模式控制.
- 使用一维微型线性转换器 (LCT) 进行A0模式激发.
- 在控制分层尺寸的CFRP板上进行实验验证.
- 使用高斯函数和理性函数拟合损坏大小-SDC关系.
主要成果:
- A0模式的Lamb波比S0模式对分层损伤的敏感性更高.
- 在SDC和分层尺寸之间确立了强烈的相关性.
- 阶段时间延迟方法成功生成了单模Lamb波.
- 实验结果验证了模拟发现.
- 高斯式和理性合函数准确量化了分层尺寸,误差很低 (绝对误差<0.8毫米,百分比误差<8%).
结论:
- 开发的SDC方法有效量化了CFRP结构中的分层损伤.
- 在A0模式的Lamb波激发是优越的检测分层.
- 阶段时间延迟方法允许选择性的Lamb波模式生成.
- 提出的检测和量化技术是实用的,准确的,并且易于实施,用于在职结构健康监测.
相关概念视频
Plastic Deformations
129
Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their...
129
Deformation of a Beam under Transverse Loading
290
Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
The insights from the bending moment diagram extend to...
290
Residual Stresses in Bending
167
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
167
Members Made of Elastoplastic Material
97
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
As the bending moment...
97
Design of Prismatic Beams for Bending
228
The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and...
228


