Thermal BiMetals

[RDyson]

Anyone with any experience using this? Or is there a better forum to ask in?
Specifically, Matweb list two parameters that describe its thermal
characteristics, but I'm unsure of their definition.

1. Specific thermal curvature, /K
2. Specific deflection, /K

Both are unitless (after mutiplying by temp) and both are small numbers
(10^-5). I'm sure that both relate to the differential expansion and #2 is
probably the difference between linear expansion of each metal. But, I have
no idea what #1 is measuring.
I'm also not sure why they are referenced to absolute temperature when they
are spec'd as linear between -20°C and +250°C.

All knowledge, theory and conjecture welcome

 

[gxmplx]

Hi,

Look under Defining Terms at the bottom of the page here:

http://books.google.com/books?id=cv...X&oi=book_result&resnum=5&ct=result#PPT435,M1

It is a custom to express temperature differences in celcius as Kelvins as long as it is clear it is a temperature difference and not an absolute temperature.

GXMPLX

 

[RDyson]

Thank you, that will be very usefull.
and sorry about the late reply, eng-tibs.com got sent to the spam trap