In terms of the relation of coordinate of physical plane and strain plane , stress and strain field distribution curve expressed by polar coordinates in damage area is derived , when n = l , the result is same as that given by c . h . popelar 由物理平面與應變平面坐標間的關系,得出了極坐標中損傷區應力、應變場的分布。當n = 1時,所得結論與c