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  1. HughRob

    What determines the maximum fill rate for hydrostatically testing large concrete tanks

    Hi, In Australia AS3735 states that the maximum fill rate for a hydro test is 2m per 24 hours, it is vague whether it has to be a uniform rate taking 24 hours (i.e. 2m/24 = 0.083m per hour) or could be achieved in a lesser period, let's say maybe 2m in 10 hours. I appreciate that there should...
  2. HughRob

    Three Phase Rotation

    Why do leads need to be changed to get correct rotation on a 3 phase motor? I understand about that sine waves, etc. But if all things are equal so the power system from the main transmission lines entering the building are pulled the same way so the relationship between L1, L2 and L3 are in...
  3. HughRob

    Forced Convection passed Heating Coil - A question of Understanding

    My question which seems embarrassing resolves around the final temperature of the downstream air flow. If we have a duct and inside the duct is a heating coil. Lets say the heating coil only covers 50% of the cross sectional area for arguments sake, it is obvious that only a proportion of the...
  4. HughRob

    Welding Jig for Aluminium Fabrication

    Hi, I am new to Aluminium fabrication and I have a question about welding jigs. If I am going to weld a frame for instance should I allow movement due to weld contraction to prevent cracking?
  5. HughRob

    Is it Helpful?

    Thanks for everyone's answers. I am going ahead to upgrade to Professional. I spoke to Abaqus as well and for me to upgrade to Professional will cost 6K but to get Abaqus would be 16K. Abaqus said the difference is in the way the various contacts are handled. Most FEA programs are not that...
  6. HughRob

    Is it Helpful?

    Hi, curate I have Solidworks Premium that comes with Static Analysis FEA ability. I have been looking at going to Professional which gives me fatigue ability for linear systems. But apart from mild steel most materials that we really use such as plastic, aluminium, etc are non linear, so is...

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