MATERIALS!-Part 1

Discussion in 'Homework Help' started by Hello, Jan 3, 2009.

  1. Hello

    Thread Starter Active Member

    Dec 18, 2008
    82
    0
    Which material has the highest critical strain energy release rate?

    Mild steel
    Polypropylene
    Polystyrene
    Cement
    Alumina


    Any help is greatly appreciated.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,638
    2,344
    Hello,

    Did you already had a look on this site?
    http://www.matweb.com/

    It was mentioned on the page I already gave you.

    Greetings,
    Bertus
     
  3. studiot

    AAC Fanatic!

    Nov 9, 2007
    5,005
    513
    I don't have values for all these to hand for K_{IC} so you will have to look some up for yourself.

    However mild steel and polypropylene are ductile materials and therefore the best candidates. All the others are brittle materials.

    Mild steel 100-200
    Concrete 0.2 -0.4
    Polycarbonate 1.0 - 3.5
    Acrylic 1 - 2
    all in MN^{-3/2}

    Look up 'fracture toughness' of each material. The one with the lowest is the most brittle, you require the most ductile.
     
  4. Hello

    Thread Starter Active Member

    Dec 18, 2008
    82
    0
    Thanks, great help!
     
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