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bimetal design guide
2

bimetal design guide

bimetal design guide

(OP)
I am working on a product that has a bimetallic strip that is used for temperature compensation.  It is a U-shaped strip, with the "legs" of unequal length.  I am attempting to calculate deflection, etc., but don't know where to start - it is more complicated than the cantilever beam theory stuff I learned in school.  Does anyone know of any sources or design guides regarding bimetal material or deflection of irregular shapes?

RE: bimetal design guide

Hi,
A good place to start would be to look at Roark's Formulas for stress and strain by Warren C. Young. This may help you get started. I am no expert on this, but that is where I would look.

RE: bimetal design guide

Not sure why it would be U-shaped, however you could try looking in Moffat R.J. 'Experimental Heat Transfer' paper KN11 pp187-206, Proceedings of the 9th International Heat Transfer Conference 1990.

This paper gives an expression for the radius of curvature for an unrestrained bimetallic strip which could give you a start.

Cheers the noo!

RE: bimetal design guide

2
Actaris,

Try contacting these guys...

Engineered Materials Solutions Inc. (http://www.emsclad.com/about.html)
PO Box 2410
39 Perry Avenue
Attleboro, MA 02703
ATTN:
Ron Burnett
USA Phone:  508-342-2223
USA Fax:   508-342-2125
E-Mail:
rburnett@emsclad.com

This company used to be part of Texas Instruments and they have an excellent bimetal design guide that has material properties and equations for several bimetal shapes (including U-shape) I believe.  I used to have the manual when it was a TI publication and it was extremely helpful.

Good luck,
Vidaman

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