An experimental investigation of constraint effects on mixed mode fracture initiation in a ductile aluminum alloy

Journal Article · Wed Mar 31 00:00:00 EST 1999 · Acta Materialia

OSTI ID:345104

Roy, Y A; Narasimhan, R; Arora, P R ^[1]

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1. Indian Inst. of Science, Bangalore (India). Dept. of Mechanical Engineering

The effect of constraint on ductile fracture initiation from a notch tip under mode 1 and mixed mode (involved modes 1 and 2) loading is investigated. To this end, mixed mode fracture experiments are performed with Compact Tension Shear (or CTS) specimen of a ductile 2014-O aluminum alloy. The constraint effects are investigated by considering specimens with two crack length to width ratios. The effect of crack tip constraint on the relationship between the critical value of the J-integral at fracture initiation (J{sub c}) and M{sub p} is examined. Further, the micromechanics of mixed mode ductile fracture initiation is investigated by performing fractographic studies and metallographic studies and metallographic examination of the mid-plane region of the specimen near the notch tip.

• OSTI ID: 345104
• Journal Information: Acta Materialia, Vol. 47, Issue 5; Other Information: PBD: 31 Mar 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FRACTURE PROPERTIES
ALUMINIUM BASE ALLOYS
NOTCHES
FRACTURE MECHANICS
LIMITING VALUES
FRACTOGRAPHY
METALLOGRAPHY