A. 在横坐标轴以破坏时的σ1为圆心，以（σ1-σ3）／2为半径
B. 在横坐标轴以破坏时的σ3为圆心，以（σ1-σ3）／2为半径
C. 在横坐标轴以破坏时的（σ1+σ3）／2为圆心，以（σ1-σ3）／2为半径
D. 在横坐标轴以破坏时的（σ1～σ3）／2为圆心，以（σ1+σ3）／2为半径
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