Equivalent elastic modulus

[elogesh]

Hi,

I have a steel plate coated with lead.

How can I find the equivalent modulus of the plate, if the steel and lead plate thickness are equal.

The plate is subjected to axial as well as bending loads.


Regards,
Logesh.E

 

[Nigel]

Why is the plate coated in lead?

Nigel Waterhouse B Eng (Hon's)
Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre

http://www.canamaero.com

 

[GregLocock]

You have to develop an equivalent homogenous section. This is frequently done for steel reinforced concrete.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[elogesh]

Hi Nigel,

This plate covers x-ray source. It is coated to avoid passage of x-rays.

Regards,
Logesh.E

 

[arto]

Look under "Composite Beams" [Budynas "Advanced Strength & Applied Stress Analysis" has it]
Axial - set the strains equal,
stress in stl = [Es/El]x Stress in lead

Bending - use equivalent cross section, equiv width of steel = [Es/El]*orig width.

maybe neglect lead altogether [since E~ 1/15 that of steel]
& just use steel thickness in calc's?