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Article Dans Une Revue Journal of Engineering Materials and Technology Année : 2020

Novel Specimen Design for Measurement of In-Plane Fracture Toughness of Metals

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Résumé

Standard-compliant measurement of the in-plane fracture toughness of metals is often challenging due to insufficient material in the through-thickness direction to extract a full single edge bending (SEB) or compact tension (CT) fracture specimen. In the present work, we propose a new specimen design methodology to overcome this challenge. A W-shaped SEB specimen (called W-SEB) was developed, and its topology was optimized using finite element simulations. The new specimen design was validated numerically and experimentally on a case study showing excellent agreement with standard ASTM E1820 actual SEB specimen geometry. In view assessing the anisotropy of the fracture toughness (K-Q and crack tip opening displacement (CTOD)) of pipeline steels susceptible to hydrogeninduced cracking (HIC), the W-SEB specimen was tested on X65 and X42 pipeline steel samples taken from the field. Experimental results show an increase in the maximum CTOD along the in-plane direction as compared to the transverse direction for both steel grades. Such experimental results could lead to important considerations with respect to accurate fitness for service assessment of HIC-damaged assets.
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Dates et versions

hal-03627685 , version 1 (01-04-2022)

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Abderrazak Traidia, Elias Chatzidouros, Mustapha Jouiad, Kaamil-Ur-Rahman Shibly. Novel Specimen Design for Measurement of In-Plane Fracture Toughness of Metals. Journal of Engineering Materials and Technology, 2020, 142 (2), ⟨10.1115/1.4045327⟩. ⟨hal-03627685⟩
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