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The electrical resistance of a notched compact specimen for determination of plane-strain fracture toughness was calculated using numerical methods coupled with the Schwarz-Christoffel transformation. Experimental measurement of this resistance is commonly used to obtain the crack length in notched specimens subjected to stress corrosion and hydrogen embrittlement tests. The results presented here predict the shape of the calibration curve for this experiment and facilitate optimal design ofdoi:10.1149/1.2114292 fatcat:yri2ueq7nzhmza22ukjyityvkm