相关实验视频

Updated: Jul 28, 2026

Ultrasonic Welding of Thermoplastic Composite Coupons for Mechanical Characterization of Welded Joints through Single Lap Shear Testing

Ultrasonic Welding of Thermoplastic Composite Coupons for Mechanical Characterization of Welded Joints through Single Lap Shear Testing

Published on: February 11, 2016

在碳纤维增强聚合物中,通过高分辨率超声波检测自动量化介层分层的量化

Khaled Matalgah¹, Pruthul Kokkada Ravindranath¹, Daniel Pulipati¹

¹Department of Mechanical Engineering, Baylor University, One Bear Place, #97356, Waco, TX 76798-7356, USA.

|December 23, 2023

概括

超声波测试 (UT) 可以准确地检测和量化碳纤维增强聚合物 (CFRP) 复合材料中的内层分层. 该方法提供高分辨率成像,用于精确的缺陷位置和范围分析,这对于结构完整性至关重要.

科学领域:

材料科学材料科学材料科学
非破坏性测试不破坏性测试
复合材料工程复合材料工程

背景情况:

层间分层是碳纤维增强聚合物 (CFRP) 复合材料中的关键缺陷,损害了结构完整性.
准确检测和量化这些分层是安全和性能至关重要的.
现有的方法可能缺乏全面分析所需的分辨率或深度传感能力.

研究的目的:

提出和验证一种高分辨率超声波测试 (UT) 方法,用于检测和量化CFRP复合材料中的层间分层.
为了比较UT的有效性与X射线计算机断层扫描 (CT) 进行分层评估.
评估UT在确定分层的深度和范围方面的能力.

主要方法:

用嵌入的PTFE薄膜作为人工分层站点制造单向和编织的CFRP层材.
机械测试使用三点,末端纹曲 (ENF) 测试来诱导分层.
使用超声波测试 (UT) 和X射线计算机断层扫描 (CT) 量化分层程度.
对UT和CT数据进行比较分析,包括深度定位研究.

主要成果:

UT成功地检测和量化了单向和织造的CFRP复合材料中的内层分层.
在UT和CT之间获得了可比的结果,平均分层面积差异为1.09% (UT略高估).
UT准确地预测了所有测试样品在一个薄膜接口内的分层深度.
在平面尺寸和深度的高空间分辨率通过UT方法实现.

结论:

超声波检测 (UT) 是一种高效,高分辨率的技术,用于检测和量化CFRP复合材料中的层间分层.
开发的UT方法提供了对分层范围和深度的准确评估,这对于材料表征至关重要.
UT提供了一种可靠的非破坏性评估工具,以确保CFRP组件的结构完整性,这些组件受到曲应力.

关键词:

在CFRP的基础上.脱层是分层的方法之一.非破坏性测试是指非破坏性测试.超声波测试超声波测试超声波测试

更多相关视频

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates

Published on: April 27, 2019

Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process

Author Spotlight: Enhancing Fiber Composite Laminate Quality with the Wet Hand Lay-Up/Vacuum Bag Process

Published on: June 30, 2023

相关概念视频

¹³C NMR: ¹H–¹³C Decoupling

¹³C NMR: ¹H–¹³C Decoupling

The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...

Mass Spectrometry: Complex Analysis

Mass Spectrometry: Complex Analysis

Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...

Double Resonance Techniques: Overview

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...