第二章 应力状态
J1?0 (2.6-2a)
I12?3I21222 J2??(?1??2)?(?2??3)?(?3??1)? (2.6-2b)
63?? J3?1?(2?1??2??3)(2?2??3??1)(2?3??1??2)? 271=(2I13?9I1I2?27I3) (2.6-2c) 27 如果令
S1??1??m?S?2??2??m? (2.6-3) S3??3??m??称S1、S2、S3为应力主偏量。于是式(2.6-2)可以重写为 J1?S1?S2?S3?0? J12S222?S?2??(1?S2?S3)?S1S22S3?S3S1? (2.6-4)
J?3?S1S2S3?
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