High Elongation Applications

When terminal strips are used with high-elongation strain gages (post-yield measurements), it is preferable to locate the terminal strip at least 1/16 in (1.5 mm) away from the end of the gage backing to avoid unbending problems due to thick areas of adhesive. If the terminal backing is placed against the gage backing in an M-Bond 200 installation, a "ramp effect" results as shown below, and bonding failure will occur at the location shown. The "half-terminal" technique (see Cryogenic Applications) is usually employed in high-elongation work if the strain level will exceed 2 to 3%.

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