Stresses in triangular plate

[IFRs]

Does anyone have references for calculating the stresses and the deflections in a simply supported triangular plate under uniform loading or pressure? My Roark's only has round and parallel edge supports. Thanks!!

 

[mrMikee]

My copy of Roark & Young (5th edition) in Table 26 has cases 17 and 18 for triangular plate with simple supports.

Regards,
-Mike

 

[IFRs]

Any chance you could scan it?
I am using MathCAD's extension pack and it does not have this load case.

 

[mrMikee]

IFRs,

I'll be out of the office until late tomorrow afternoon. If I don't see anything posted by then I will try to get it scanned.

-Mike

 

[prex]

The basis of Roark's formulae is the Timoshenko, art.72.

prex

http://www.xcalcs.com

Online tools for structural design

 

[mrMikee]

IFRs,

I have not been able to get a good scan off the equipment I have. If you still need it, maybe someone else can help.

Regards,
-Mike

 

[Allen]

IFRs,

Here is an excel based software named "Plate Analysis"
(based on "Roark's Formulas for Stress & Strain" 6th edition")which has all forms of plates & loadings as triangular well:

http://www.mecaenterprises.com/plate.htm

And for download a demo:

http://www.mecaenterprises.com/downloads.htm

 

[IFRs]

Mike -
If you can, I would appreciate it very much. If not, I understand and thank you for your efforts to date.
Allen -
Your demo only does rectangular supports, but thanks anyway!

 

[rb1957]

from Roark 7th Ed, table 11.4.17, pg519

for an equilateral triangle, simply supported sides, constant thickness, with a uniform pressure load
maximum stress = 0.207q*((L/t)^2)
where q = applied pressure
and L = side length

(the equation is in terms of a, the perpendicular height, = L*sqrt(3)/2)

and max displacement = -0.019q(1-nu^2)L/E*((L/t)^3)
nu = 0.3 ... (1-nu^2) = 0.91

 

[mrMikee]

IFRs,

I just sent two scans to the email address in your profile.

The quality is about the best I can do.

Hope it works.

-Mike

 

[IFRs]

rb1957 and Mike - I appreciate your efforts very much. Stars to follow when I get home and have more than 10 seconds of battery life