Greetings
I am working to a German code DVS 2205-2 dated 1997 (still very popular in UK).
Title: “design of vertical, cylindrical non-pressurised tank” - wholly in Polypropylene
This code specifies DIN 1055-4 for wind loads.
Does anyone know if this code (DIN 1055-4) is gust based or mean...
Greetings
I have used since 2000; an excellent FEA package called AutoFEA (by JL Analyzer). (It has earned much more than it cost).
When I draw a model, I use standard Cartesian – x, y & z.
When (after processing) I look for bending stress (between two nodes) I am offered ‘S’ and ‘T’...
Greetings
At 10.5.3 there is an equation (78) for critical buckling pressure.
pcr = 0.242 x Eb x (t/R)2 (Eq 78)
Can anyone help with which 't', is it, 'tb' or 'tk'?
Or, is it just another 'typo'?
EN 13121-3 is a 'newish' code (now on fifth edition): knowledge on
this code is in very...
Greetings,
I use Mathcad 2000, which (in my view) is the best ever version...
However,
To compute the equation for a range of variables, ie.
t:= 10, 11; 20
A vertical table is formed at t = of 10, 11, 12, 13..20.
Can anyone explain how the font size of output table is controlled,
or, how...
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Can anyone suggest a value for Poisson's ratio for plywood to this specification.
18 mm thick, five ply, eucalyptus with phenol-formaldehyde glue in core and on face and back.
The Modulus (Em) is given as 3000 MPa (class E30).
Made in China, marked Q grade.
I am trying to determine...
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I am trying to design a full face flange joint to EN13121-3 (a newish and untested EU code for GRP/FRP tanks and vessels).
The flange design procedure is different to ASME or BS, in that it requires gasket surface sealing stress.
Can anyone give any data on solid EPDM gasket...
Greetings
A new design code for plastic tanks (EN13121-3) uses the term 'carding moment' - for moments applied to item in question.
The item in question, is a nominal 600 dia, about 250 long tube; fixed at one end (built into tank shell) and free at other. It is a manhole, with flange, gasket...
Greetings
I am designing a simple thermoplastic lined/GRP (aka FRP) reinforced, vertical, cylindrical, 30 m3 atmospheric tank to EN 13121-3 - which is a new (fifth attempt, very complicated - written by a subscript obsessive) standard - in response to the EU PED.
Tank has low level (on shell)...
Greetings all
After 40 + years of using BS4994 to design GRP (FRP) tanks and vessels, someone has persuaded EU that a new standard/code was required.
A problem with prEN13121-3 is the obsession with multiple subscipts...
I can use s plus g for sigma.
I can add a subscript, by using period...
Greetings from England
In my kind of work, log function is very unusual.
I have found that log(number)= works fine - in that answer is correct.
y: 4.601 log(y) = 0.66285
But now I need to evaluate the anti-log...can be easily done on pocket
calculator (via inverse/shift); but how is it...
Greetings
I know it is an old chestnut - but does anyone have shear strength through the thickness (test) data; for any given multiple layers of csm with an isopthalic resin?
Or any source of such?
Regards
Ed Clymer
Resinfab & Associates
England
Greetings from England
I am trying to establish design procedure for horizontal GRP (FRP) vessels: to BS4994 - which are based on BS5500.
It would appear that a 'flexible saddle' is required (rather than a rigid one). Saddles would be of carbon steel, lined with rubber. Can someone help with...
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We are trying to verify calculations, made to UBC-97 for a FRP water tank in Tunisia - to be built to BS4994:87 Cat I.
Greetings
Can anyone help with values: for FRP tank and factor R - ductility coefficient - from table 16-N?
Also, does factor W include tank contents (1630.1.1)...
Greetings
We are trying to verify calculations, made to UBC-97 for a FRP water tank in Tunisia - to be built to BS4994:87 Cat I.
Can anyone help with values: for FRP tank and factor R - ductility coefficient - from table 16-N?
Also, does factor W include tank contents (1630.1.1)?
And a...
Greetings
Programme works well - particularly on shells, where I use to determine stress distribution on thermoplastic and GRP (FRP) tanks and vessels.
As you will know the 'instructions' are not very good.
My specific question, relates to 'soft spring' - when asked for by dialogue box...
Greetings
We are looking for help: in trying to calculate loadings felt by a GRP (FRP) firefighting foam bulk storage tank, mounted to deck of firefighting ship - for use off-shore.
Tanks is 4 m dia (13 feet) by 7.14 m height (24 feet), vertical, cylindrical, closed top and vented.
Ship is...
Greetings from England
A specification document from American Society of Civil Engineers (ASCE) gives seismic loading for proposed GRP (FRP) composite tanks as;
Aa = 0.2 and Av = 0.2
Can anyone give the units for Aa and Av
Are they already factored?
If not can anyone suggest factors?
And...
Greetings from England
A specification document from American Society of Civil Engineers (ASCE) gives seismic loading for proposed composite tanks as;
Aa = 0.2 and Av = 0.2
Can anyone give the units for Aa and Av
And the context in which they would be used.
Many thanks
Ed
Ed Clymer...
Greetings all
In the context of FEA, what is 'soft spring'?
When is it switched on and what sort of values are used
Many thanks
Regards
Ed Clymer
Resinfab & Associates
England
Greetings
Anyone good suggestion as to Young's Modulus at 20°C, continuous 5 MPa stress for 10 years.
Thanks in advance
Ed
Ed Clymer
Resinfab & Associates
England
