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Using a plate made of A2017-T6 metal matrix composites reinforced with 10 volume % and 20 volume % Al 2 O 3 particles and Al alloy possesses the same composition as matrix alloy, the crack propagation rate da/dN of a mode I surface crack by the simultaneous action of plane bending and cyclic torsion are studied. And the effects of crack tip opening stress σ top ,...
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