Based on the theory about the plastic instability of sheet, a theoretical formula for calculating the plastic instability is worked out with the influence of the in-plane directionality of n-value on FLCs in different directions counted in, and corresponding theoretical FLCs are established.
本文根据板材失稳理论推导了考虑板平面不同方向n值影响的失稳计算公式并建立了相应的理论FLC。
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