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  1. Oceania

    Carbon Fiber and Stainless Steel

    In principal I wouldn't have stainless steel directly in contact with carbon fibre. If you do a search in the composites engineering forum, there are several threads relating to carbon fibre to metal contact issues.
  2. Oceania

    MathCAD 14 Pricing

    I'm looking to upgarde to V14 on the basis that it is supposed to be Vista compatible, however it appears they are adding a more complicated licence management system and its getting confusing as the price differentials in Australia are high. For a V12-V14 single user downloadable upgrade, its...
  3. Oceania

    Designing with plastic

    You will find all pultrusions that are offered by Strongwell, Creative, Exel, etc. are all based on a very similar performance standard (It is rumoured that most pultrusions are based on the Strongwell design) although Asian supplies can be variable. However you can apply general international...
  4. Oceania

    FRP (GRE) Piping - Installation by burying

    Depending on the distance between the pits the effect of thermal expansion should of been assessed. The usual method of relieving changes in expansion and contraction is through an O ring articulated joint either at the pit or at one or more locations along the length of the pipe. Alternatively...
  5. Oceania

    non-mechanical bond UHMW to steel

    There is a work around to bonding UHMWPE to steel and that is to use a fibre impregnated sheet(and I'm assuming this problem uses flat sheet) A good epoxy adhesive will bond to both the steel and the glass fibre backed material, and give you a reasonable joint. If you don't wish to use the...
  6. Oceania

    FRP (GRE) Piping - Installation by burying

    The most often standard for buried FRP pipe is the AWWA M45 code usally in conjunction with the AWWA C-950. Also look at AS2566 this has some good info in it too. These standards allow a theortical stiffness/strength of pipe to be matched with the indicated burial conditions. However, this is...
  7. Oceania

    Best pipe material for submerged water service

    I would suggest FRP Pipe would be an ideal candidate for this application. No corrosion, so long life, no flaking to block nozzles so it can stay in during the winter. UV protection is easily resolved with a pigmented external flow-coat (pic the colour you like here as well). As for stiffness...
  8. Oceania

    project to supply potable water to island

    The above are all good ideas, however I would also suggest ensuring additional protection where it passes over any coral as over time, tide movements and sand will start to abrade the surface. To reduce this problem if you think its going to occur is to fit some polyurethane covers over the...
  9. Oceania

    Seismic loading

    Dear Ed, If you undertaking a seismic evaluation of an FRP tank, I would suggest you go to ASME RTP-1 where the hard work has been done for you. Here you should be putting in your accelerations depending on the seismic contouring of the area the tank is going to be placed.
  10. Oceania

    Property of Polyester Resin

    The use of waxed resins has very particular problems and from my experience of filament winding pipes does make a difference when laying up fittings etc. My preference is not to construct the main laminate with wax added, but to finish off the last layer with wax. This ensures that air...
  11. Oceania

    Determine Young's Modulus and Shear Modulus of Woven Roving

    There is some public domain data published for tensile strength and modulus vs fibre volume fraction, some resin manufacturers have data for general laminates ie. all CSM or WR/CSM. Most good books on composite materials will have the data and hopefully should give resin type, manufacturing...
  12. Oceania

    Determining Weld Size From FEA VonMises Plot

    Dear All, I have been asked to develop weld sizes from a Von Mises plot of a rectangular tank c/w stiffeners. The model was created in SOLIDWORKS/COSMOSM and as such I understand this created a solid brick element model from the parametric model. I read a NAFEMS report based on a FEMNET...
  13. Oceania

    FRP Pipe Butt Join

    You should refer to the standard to which the pipe has been designed and manufactured. It will tell you what you need to do andyou can calculate the length and thickness for the wrap depending on the laminate used in the pipe construction. Alternatively ask the pipe manufcaturer. I used to...
  14. Oceania

    Composite anti-inrusion bar questions

    Just for information, I used to work for a company building all composite bodied cars, and sponsored an Indy race version. We never had composite door bars, safety was paramount and we wouldn't put the driver at risk for the associated weight saving. I would suggest use a steel door bar and look...
  15. Oceania

    Barcol hardness of in-serivce FRP equipment

    The normal problem of corrosion is shown in part by a reduction in Barcol hardness (I assume you are undertaking the inspection to the appropriate standard). I would check the expected hardness against the manufacturers data for the cure system that was used. However it is known that full cure...
  16. Oceania

    Corrosion under carbon fiber composite

    I have reinforced a reasonable amount of steel with carbon fibre over the years and have undertaken a number of simple corrosion tests. Due to the variation in consolidation you will get touching points, and in time depending on the steel and the humidty some element of corrosion. Early work...
  17. Oceania

    Rectangular Tank Design

    Can anyone help with a design code for rectangular tanks. I have tried alot of the on-line code suppliers but am unable to identify a code that covers these tanks. I appreciate that they are mostly atmospheric, but any suggestions would be appreciated

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