SYMPOSIA PAPER Published: 01 January 1983
STP37322S

Crack Growth in Creeping Solids

Source

The creep crack growth behavior in a creep-ductile material, 6061 aluminum, and a creep brittle material, Ti-6242, has been investigated. In the creep ductile material an observed load dependency in the relation between the load-point displacement rate, ˙Δ, and the crack growth rate, ˙a, precluded the straightforward application of the C* approach. An alternative approach has been developed in which ˙Δ, ˙a, and P are interrelated through an equation of form ˙ΔPα˙aθ The exponent α determines the contribution of creep deformation to ˙Δ and therefore relates to the creep ductility or creep brittleness of the material. For both materials tested the foregoing relationship was able to describe the experimental results without any systematic scatter.

Author Information

Radhakrishnan, VM
Fatigue and Fracture Mechanics Group, Defense Metallurgical Research Laboratory, Hyderabad, India
McEvily, AJ
University of Connecticut, Storrs, Conn
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Details
Developed by Committee: E08
Pages: I-675–I-689
DOI: 10.1520/STP37322S
ISBN-EB: 978-0-8031-4869-7
ISBN-13: 978-0-8031-0727-4