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. 2015 Mar 6;373(2036):20130157. doi: 10.1098/rsta.2013.0157

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© 2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 17. — The measured (a) and best-fit (b) elastic strain fields (in 10⁻⁶) for the crack-opening (ε_yy) direction at K_Imax=6.6 MPa√m for an Al 5091 CT sample. The LEFM best-fit crack-tip strains correspond to a crack-tip stress intensity of K^eff_Imax=6.11 MPa√m,K^eff_IImax=0.33MPa√m (table 1) [22]. (Online version in colour.)