Approximate solution for degenerate scale problem of two rigid lines in series in plane elasticity

By using the technique of coordinate transform, the degenerate scale problem of two rigid lines in series can be solved in the normal scale. It is assumed that the distance between two rigid lines is much longer than the size of the rigid lines. In this case, the formulated equation can be significantly simplified, and an approximate solution is obtainable. Numerical examination proves that the approximate solution can also be used to a wider range with a close distance between two lines.