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120,40,-30 120,30,-30 130,30,-30 80,50,-50
120,40,-30 120,30,-30 130,30,-30 80,50,-50
-85MPa 85MPa -75MPa 75MPa
σ1=37MPa,σ2=0,σ3=-27MPa σ1=27MPa,σ2=O,σ3=-37MPa σ1=27MPa,σ2=0,σ3=-16MPa σ1=16MPa,σ2=0,σ3=-27MPa
120,40,-30 120,30,-30 130,30,-30 80,50,-50
σr3=50MPa σr3=113.1MPa σr3=200MPa σr3=114.2MPa
-85MPa 85MPa -75MPa 75MPa
120,40,-30 120,30,-30 130,30,-30 80,50,-50
主应力大小和方向均相同 主应力大小和方向均不同 主应力大小不同,但方向相同 主应力大小相同,但方向不同
-85MPa 85MPa -75MPa 75MPa
-85MPa 85MPa -75MPa 75MPa