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Utilization of Scanning Acoustic Microscope (SAM) to prove the existence of stress relaxation in woven composite
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Paper Abstract

Nonlinear ultrasonic techniques have shown the prominent potential for assessing progressive damage occurred in the composite materials in their fatigue life cycles. Stress relaxation in composite material is being measured in two ways, in-situ analysis (on-line technique) using Lamb waves and Off-line technique using pressure wave (Scanning Acoustic Microscope). In this article, the progressive damage was investigated by a set of fatigue loading experiments on woven composite samples followed by a specific duration of stress relaxation in room temperature condition. A quantitative measure of stress relaxation is determined using Scanning Acoustic Microscope for a fatigue cycle of 225000 with the loading frequency of 10 Hz. To prove this claim, a well-established reduced order nonlinear state of Lamb wave due to stress-relaxation was compared with SAM data analysis. A good agreement between these two techniques is reported herein.

Paper Details

Date Published: 18 March 2019
PDF: 6 pages
Proc. SPIE 10973, Smart Structures and NDE for Energy Systems and Industry 4.0, 109730C (18 March 2019); doi: 10.1117/12.2522084
Show Author Affiliations
MohammadSadegh Saadatzi, Univ. of South Carolina (United States)
Hossain Ahmed, Univ. of South Carolina (United States)
Subir Patra, Univ. of South Carolina (United States)
Sourav Banerjee, Univ. of South Carolina (United States)


Published in SPIE Proceedings Vol. 10973:
Smart Structures and NDE for Energy Systems and Industry 4.0
Norbert G. Meyendorf; Kerrie Gath; Christopher Niezrecki, Editor(s)

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