Paper Titles
Matrix Crack Detection of CFRP Laminates in Cryogenic Temperature Using Electrical Resistance Change Method
p.873
The Collapse Characteristics of CFRP Hat-Shaped Section Members under Axial Compression
p.877
The Impact Collapse Characteristics of Al/CFRP Members for Light-Weight
p.881
The Penetration Characteristics of CF/Epoxy Curved Sheller According to Stacking Sequence
p.885
Ultrasonic Inspection of Carbon/ Phenolic Composites Using a Peak-Delay Measurement Method
p.889
Nondestructive Determination of Ply-Layup Error in Cured/Uncured CF/Epoxy Composites
p.893
Effective Flexibility Calculation for Beams with Periodic In-Homogeneities
p.897
Analysis of Dominant Frequencies of Glass Fiber/Aluminum Laminates during Acoustic Emission Measurement
p.901
Acoustic Emission Monitoring of Ablative Composite Liner Bonded on Steel Nozzle under Static Loading
p.907

Ultrasonic Inspection of Carbon/ Phenolic Composites Using a Peak-Delay Measurement Method

Article Preview

Abstract:

Carbon/phenolic composite (CPC) materials are unique which consist of carbon fibers embedded in a carbon matrix. The CPCs are originally developed for aerospace applications and its low density, high thermal conductivity and excellent mechanical properties at elevated temperatures make it an ideal material for aircraft brake disks. The properties of the CPC are dependent on the manufacturing methods used for production and fiber arrangement. It is desirable to perform nondestructive evaluation to assess material properties and part homogeneity in order to ensure product quality and structural integrity of CPC brake disks. In this work, a CPC material was nondestructively characterized and a technique was developed to measure ultrasonic velocity in C/P composites using automated data acquisition software. Also a motorized system was adopted to measure ultrasonic velocity on the point of CPC materials under the same coupling conditions. Manual results were compared with those obtained by the motorized system with using drycoupling ultrasonics and through transmission method in immersion. A peak-delay measurement method well corresponded to ultrasonic velocities of the pulse overlap method and throughtransmission mode and C-scan image signal based on peak-to-peak amplitude.

You might also be interested in these eBooks
Advanced Nondestructive Evaluation I View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Pages:

889-892

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.321-323.889

Citation:

Cite this paper

Online since:

October 2006

Authors:

In Young Yang, Kwang Hee Im, David K. Hsu, Sung Jin Song, Hyeon Cho, Sun Kyu Kim, Young Hwan Seo, Je Woong Park

Keywords:

Carbon/Phenolic Composites, C-Scan Images, Peak-to-Peak Amplitude, Ultrasonic Evaluation

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] K. H. Im, D. K. Hsu and I. Y. Yang,; KEM, (2004), Vols. 270-273, pp.1806-1811.

Google Scholar

[2] E. Fitzer: Carbon(1987), Vol. 25, pp.163-190.

Google Scholar

[3] Carbon Matrix Composites, 1988, Was Provided by a Certain Company.

Google Scholar

[4] D.K. Hsu, P.K. Loaw, M. Yu, V. Saini and N. Miriyala,: Symposium on Ceramic Matrix Composites: High Temperature Structural Materials(1994), Boston , MA, Nov. 28-Dec. 4.

Google Scholar

[5] D.K. Hsu and M. S. Hughes:J. Acoust. Soc. Am. (1992), Vol. 92(2), pp.669-675.

Google Scholar