tszhoi asked in 科學及數學工程學 · 1 decade ago

strength of materials- lab report

plz define young's modulus, 0.1% proof stress, tensile strength, percentage elongation and percentage reduction of area after fracture.


1 Answer

  • Mike
    Lv 5
    1 decade ago
    Favorite Answer

    Young's modulus - The ratio of stress to strain on the loading plane along the loading direction.


    0.1% proof stress - The stress that will cause a permanent extension of 0.1 % of a tensile test piece.


    Tensile Strength - The tensile strength of a material is the maximum amount of tensile stress that it can be subjected to before failure.


    Percentage elongation - The elongation of the test specimen expressed as a percentage of the gage length.


    Reduction of Area is expressed as a precentage and is given by:-

    Percentage Reduction of Area (%) = 100 (Ao - Af)/Ao


    Ao is the orginal cross-sectional area

    Af is the cross-sectional after fracture


    Source(s): my engineering knowledge
    • Login to reply the answers
Still have questions? Get your answers by asking now.