Evaluation of high density braid termination fatigue life and condition. Milestone report. [Electromagnetic radiation shielding] [electronic resource].

Published:: Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1976.
Physical Description:: Pages: 19 : digital, PDF file
Additional Creators:: United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

A part of the total high-density, braided shield development work was devoted to evaluating electromagnetic radiation (EMR) braided shield solder terminations. Because field handling and excessive flexing of cables lowers the effectiveness of EMR shielding, fatigue failure data is essential for determining the life expectancy and future design of cables. Cables were bent vertically across a 0.375-in. (9.5 mm) mandrel (0 to 180 to 0 degrees) for 100 cycles. Wire breakage averaged about 16 percent of the braid. The test was repeated using a 0.50-in.-dia (12.7 mm) mandrel with breakage averaging about 12 percent. The impregnation of the braid with cellulose nitrate, where practical, creates a more uniform stress distribution and thereby increases the cable fatigue life. Efforts directed toward developing a technique for nondestructively evaluating the quality of the soldered braid termination proved promising. Initial nondestructive test results on solder joints produced a family of curves which compared directly to the breaking strength of the joints when pull tested. Further development will involve applying the technique to braid-to-EMR hardware terminations.

Report Numbers:

E 1.99:bdx-613-1435(rev.)
bdx-613-1435(rev.)

Subject(s):

Engineering

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Note:

Published through SciTech Connect.
08/01/1976.
"bdx-613-1435(rev.)"
Belarde, E.
Bendix Corp., Kansas City, Mo. (USA)

Funding Information:

E(29-1)-613

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