Strain field in deformable solid (continuum) has to follow compatibility equations so as to ensure single valued continuous displacement field.(adsbygoogle = window.adsbygoogle || []).push({});

There are in all 81 such equations and most of them are repeated, finally we are left with 6 equations.

It is quoted in text books that only 3 out of these 6 equations are independant.

If it is so why we need to use six equations to ensure possibility of strain field?

Only three equations should be enough.

Please help.

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# Compatibility equations in elastcity

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