Accession Number:

AD0773716

Title:

The Effect of Weld Defects on RFI Shielding Effectiveness.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY CONSTRUCTION ENGINEERING RESEARCH LAB CHAMPAIGN ILL

Personal Author(s):

• Carlson,Kenneth W.

Report Date:

1974-01-01

Pagination or Media Count:

18.0

Abstract:

Many specifications for electromagnetically shielded facilities require that weld seams be 100 percent defect-free though very little data is available to support this requirement. Such high levels of quality control are expensive and time consuming. The investigation determines the effect of weld defects on the shielding effectiveness of shielded enclosures containing welded seams. More specifically, the amount of shielding degradation as a function of type and size of weld defects in Electromagnetic Pulse shielded enclosures was desired for RFI frequencies of 10 KHZ to 10 GHZ. Defects were intentionally implanted in welded 11-gage steel panels. The panels were then tested in a high-quality RFI-sealed shielded enclosure to ascertain the RFI attenuation characteristics of the defect. Modified author abstract

Descriptors:

• *NONDESTRUCTIVE TESTING
• *ELECTROMAGNETIC SHIELDING
• *WELDS
• DEFECTS(MATERIALS)
• TRADE OFF ANALYSIS
• TEST FACILITIES
• CHAMBERS

Subject Categories:

• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE