ABSTRACT

For accurately measuring thermal strains, particularly on large structures where welded strain gages cannot be used, a reversible bonded strain gage was developed. Basically it is a special polyimide strain gage which is same on both the base side and cover side so that it can be used both ways. It can be used to measure strains at temperatures under 250oC (482oF) of a structure made of aluminum alloys or composites (to which its difficult to weld a strain gage).These gages can be can be peeled after taking required apparent strain measurements in a furnace and can be attached reverse side up at a required point on a structure. To measure mechanical stresses on structures at high temperatures it is essential to measure apparent thermal stresses accurately in the first place. In practice, several strain gages in a pack are used to obtain calibration data. The apparent strain and gage factor change of all the gages in the pack are assumed to be same which is not so in......

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Title: Reversible Bonded Strain Gage
Approximate Word Count: 2982
Approximate Pages: 12 (250 words per double-spaced page)

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