Nondestructive Evaluation of Spot Welds Using Acoustic and Thermographic Imaging Techniques Lawrence Berkeley National Laboratory

Format:

Conference/Event

Author/Creator:

Türler, Daniel, author.

Conference Name:

SAE 2003 World Congress & Exhibition (2003-03-03 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

A series of laboratory experiments were conducted to determine the ability of acoustic and thermographic methods to evaluate the quality of individual spot welds and the structural integrity of spot-welded joints with and without adhesive. Test specimens consisted of spot-welded, adhesive-bonded, and weld-bonded lap joints in steel plates. The quality of the spot welds was altered by varying welding parameters. After nondestructive evaluation, the samples were peeled or subjected to mechanical tests to determine the strength of the welds. Results demonstrate that it is possible to detect defective spot welds in both the thermographic and acoustic images. Techniques are presented that allow identification of "stick" welds characterized by solid but weak contact. Methods to quantify the imaging results are being developed by comparing the acoustic and thermographic images to the data obtained from mechanical strength tests and modeling results

Notes:

Vendor supplied data

Publisher Number:

2003-01-0980

Access Restriction:

Restricted for use by site license