Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: EdClymer
  • Content: Threads
  • Order by date
  1. EdClymer

    Wind code DIN 1055 part 4

    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...
  2. EdClymer

    Help with coordinate sytem

    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’...
  3. EdClymer

    A query on EN 13121-3 (European code for FRP tanks and vessels).

    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...
  4. EdClymer

    Control of font size on iterative

    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...
  5. EdClymer

    Poisson's ratio for a specific plywood

    Greetings 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...
  6. EdClymer

    Properties of solid EPDM when used as bolted flange gasket

    Greetings 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...
  7. EdClymer

    What is a carding moment?

    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...
  8. EdClymer

    Anyone familiar with EN 1591?

    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)...
  9. EdClymer

    Multiple subscripts

    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...
  10. EdClymer

    Evaluation of anti-log

    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...
  11. EdClymer

    Shear through thickness of glass laminate

    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
  12. EdClymer

    Saddle supports for horizontal vessels

    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...
  13. EdClymer

    Seismic design to UBC-97 for FRP tank

    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. 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)...
  14. EdClymer

    Seismic design to UBC-97 and FRP tanks

    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...
  15. EdClymer

    Anyone else using JL Analyzer?

    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...
  16. EdClymer

    Loadings felt by firefighting tank

    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...
  17. EdClymer

    Seismic loading to ASCE code

    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...
  18. EdClymer

    Seismic loading

    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...
  19. EdClymer

    What is 'soft spring'

    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
  20. EdClymer

    Modulus of polyacetal

    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

Part and Inventory Search

Back
Top