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    Critical stress, stress field

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    Question 3

    Tensile tests of an elastic material show that it has a Young's modulus of... Please see attached past exam questions

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    Solution Preview

    Please see attached file

    (a) We know that, G =
    Plugging in the numbers,
    (b) Fracture Energy = 200 kJ/m2
    For plane strain conditions,
    This gives
    (c) For specimens with a central crack in a plate of finite width:

    Solution Summary

    The critical stress and stress fields are examined. A young's modulus for elastic materials are given.