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Oneaxial Shear Test

  1. Mar 10, 2016 #1
    I´m really struggling to find the shear force here.
    1. The problem statement, all variables and given/known data

    Hight h of a specimen = 100mm and diameter is 54mm.
    Max force F=144,6 N and deformation is δ=5mm

    2. Relevant equations
    I have to find ε=δ/h
    Area of specimen before deformation=54mm*100mm=5400mm
    σz =(F(1-ε))/A
    Shear force = σz /2
    3. The attempt at a solution
    ε=δ/h=5/100=0.05
    A=5400mm
    σz =(F(1-ε))/A=(144,6(1-0.05))/5400=0,025N/mm2
    Shear Force=0,025/2=0,0127N/mm2 which gives 12,7kN/m2. The right answer is 30kN/m2.

    Any thoughts?
     
  2. jcsd
  3. Mar 10, 2016 #2

    haruspex

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    I, for one, would need more description. What is the shape of the specimen? Where are the forces applied? Where is the deformation measured?
     
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