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RESEARCH PAPERS

Effect of Temperature on Acoustic Emission Evaluation of FRP Vessels (Tensile Specimens)

[+] Author and Article Information
Yizhuo Chen

Department of Civil and Environmental Engineering, University of South Carolina, 300 Main Street, Columbia, SC 29208chen43@engr.sc.edu

Paul Ziehl1

Department of Civil and Environmental Engineering, University of South Carolina, 300 Main Street, Columbia, SC 29208ziehl@engr.sc.edu

Guillermo Ramirez

Department of Civil and Environmental Engineering, University of Texas at Arlington, P. O. Box 19308, Arlington, TX 76019-0308willy@uta.edu

Timothy J. Fowler

Department of Civil Engineering, Ferguson Structural Engineering Laboratory, University of Texas at Austin, 10100 Burnet Road, Building No. 177, Austin, TX 78731fowlermarietim@hughes.net

1

Corresponding author.

J. Pressure Vessel Technol 129(3), 516-524 (Jun 29, 2006) (9 pages) doi:10.1115/1.2748832 History: Received November 23, 2005; Revised June 29, 2006

Current American Society of Mechanical Engineers (ASME) provisions require that acoustic emission testing for class II vessels be carried out at operating temperature in the event that the operating temperature exceeds 120°F(49°C). This causes increased cost due to the need for a boiler. Safety is also a concern due to the possibility of a leak or failure of the vessel during testing. More important than these two items is the lack of data that is available from fiber reinforced polymer (FRP) vessels and/or components that have been subjected to acoustic emission evaluation at elevated temperature. This has lead to speculation regarding the appropriateness of conducting acoustic emission evaluations at elevated temperature. To address these issues an experimental investigation was conducted on representative coupon specimens at differing temperatures. The results of the investigation are described.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Specimen geometry and AE sensor locations

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Figure 2

Experimental setup

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Figure 3

Schematic of loading procedure for coupon specimens

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Figure 4

Historic index calculated with 100 and 15 hits for 8084 resin at 200°F (93°C)

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Figure 5

Historic index calculated with 100 and 15 hits for 922 resin at 200°F (93°C)

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Figure 6

Average ultimate stress versus temperature

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Figure 7

Average damage stress versus temperature

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