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Two-dimensional map of the elastic strain (in 10−6) in the loading direction at Kmin(ΔK=28 MPa√m, R=0.05) showing the discontinuous contact strain field at the location of a 100% overload event (−1.9 mm behind the current crack position). (Courtesy of Crespo Lopez, Steuwer, Kelleher and Withers.) (Online version in colour.)
