3 comments on “Elastic Strain Energy

  1. Aerospace Student Post author

    At 33:31, can anyone explain to me how 0.5P1(v2 – v1) corresponds to the shaded portion of the graph, indicating change in strain energy?

    I'm not clear on this. Thanks in advance!

    Reply
  2. mrraamsridhar Post author

    Look at it this way:
    We know that the change in strain energy is represented by that small obtuse angled triangle shown shaded. The area of this triangle is:
    (Area of the rectangle formed by P1, V1 and V2) + (Area of right triangle formed by P1 and V1) – (Area of th right triangle formed by P1 and V2)

    This is = P1(V2 – V1) + 0.5P1V1 – 0.5P1V2
    = 0.5P1(V2 – V1)

    Reply

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