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sealant between faying surfaces


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Posted By<" ">Evgeny Ivanov on February 07, 2002 at 16:56:09:

I need your help.

I was doing a survey of the assembly process and found that usually mechanics put the sealant between faying surfaces during assembly or repair. The idea of sealing faying surfaces is to keep oil, water from the being trapped between structure at the faying (contacting) surfaces. Sometimes it is too much and it does not squeeze good.
I am sure that the use of the sealant between the faying surfaces does not give the desirable tightness for the joint. All rivet joints should be tight. Joint with unclamped fasteners will not have a long fatigue life. At the same time, the rivet becomes to be the subject of the bending load due to thick layer of the sealant in the joint.
The sealant was in accordance with MIL-S-8802.

Does someone have an idea how to calculate the stress in such assy? What is the minimum thikness?
Share with you exp.Please!


Best regards

Evgeny Ivanov




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