Location

Snowbird, UT, USA

Start Date

1-1-1999 12:00 AM

Description

The work presented here is part of a research effort focused on developing nondestructive evaluation (NDE) and testing techniques that are sufficiently fast, robust, accurate, and cost effective for on-line inspection of automotive structures. A series of laboratory experiments was conducted to assess the feasibility of thermographic and acoustic methods for evaluating the quality of individual spot welds and the structural integrity of spot-welded and weld-bonded joints. Emphasis was placed on identifying structurally weak “stick” welds, which are much more difficult to detect than broken welds. After nondestructive evaluation, the samples were subjected to mechanical tests to determine the strength of individual spot welds. Analytical and numerical models are also being developed to help interpret results of the laboratory experiments. The insight gained from the data and modeling results are essential in moving from qualitative techniques that identify flaws to quantitative methods that assess the severity of defects.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

18B

Chapter

Chapter 5: Engineered Materials

Section

Coatings, Interfaces, and Bonds

Pages

1543-1551

DOI

10.1007/978-1-4615-4791-4_198

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Thermographic and Acoustic Imaging of Spot-Welded and Weld-Bonded Joints

Snowbird, UT, USA

The work presented here is part of a research effort focused on developing nondestructive evaluation (NDE) and testing techniques that are sufficiently fast, robust, accurate, and cost effective for on-line inspection of automotive structures. A series of laboratory experiments was conducted to assess the feasibility of thermographic and acoustic methods for evaluating the quality of individual spot welds and the structural integrity of spot-welded and weld-bonded joints. Emphasis was placed on identifying structurally weak “stick” welds, which are much more difficult to detect than broken welds. After nondestructive evaluation, the samples were subjected to mechanical tests to determine the strength of individual spot welds. Analytical and numerical models are also being developed to help interpret results of the laboratory experiments. The insight gained from the data and modeling results are essential in moving from qualitative techniques that identify flaws to quantitative methods that assess the severity of defects.