[Solid_ec] module stress calculation (rod+sheet design)

[Cunfeng Feng]

Dear Xiaochao,

Thanks for your detail calculation. Even I don't understand all the 
terms fully, I have comment on your results as follows:
1) The ideal length is 194*(1.5+0.5+2*0.12)=434.56mm, plus both 6mm 
endplates, the total length is 447mm. I don't understand how you get 481mm.

2) I don't agree on the big hole on the bottom endplate. The pressure is 
put on the module through this endplate, the big hole will lead the 
force nonuniform on the scintillor , and will break the scitilltors. In 
fact, the fiber  can be insert into the module through the small holes 
as your original draft, not the big hole.

3) We will use the assemble tool to provide the 500kg/1000kg compression 
as Alice did, instead of the 2.5mm nuts.

4) Alice EMCal only use 4 side sheets for each module, no bar inside. If 
we plan to use side sheets also, do we still need the 2.5mm bar? As I 
know from Alice also, they use the same length side sheets for all the 
modules. If the module is shorter than the sheet, they will add some 
meterial(forget what's it). They also put few spring reed(蝶形簧片) 
between the endplates inside the  module to keep tension of the sheets.

5) As your plot show us, many shashlyk modules will be mounted on one 
big support plate from the top endplate. I don't know how importan for 
the experiment to use this one side support scheme. I think it will be 
ease for us to design the module with two end support scheme.  In order 
to reach enough support strength, I believe two end support need less 
material than one end support.


Cheers,
Cunfeng

在 2015/11/25 6:04, Xiaochao Zheng 写道:
> Dear All:
>
> I thought about the module assembling process and various requirements on the compression, load, supporting, etc.  I have attached some calculation and preliminary assembling process design. The module structure is attached in a separate PDF file. (For some reason I could not import the image into WORD without distorting it.)
>
> Please send me comments.
>
> Thanks,
>
> Xiaochao
>
> ----------------------------------------------------------------------------
> Associate Professor, Department of Physics, University of Virginia
> 382 McCormick Rd, Charlottesville, VA 22904
> Telephone: (434) 243-4032 (during academic year); or (757) 810-2885 (summer)
> Homepage: http://people.virginia.edu/~xz5y/Main.html
> ----------------------------------------------------------------------------
>
>
> _______________________________________________
> Solid_ec mailing list
> Solid_ec at jlab.org
> https://mailman.jlab.org/mailman/listinfo/solid_ec

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/solid_ec/attachments/20151127/43dd5f7d/attachment.html>