Skip to Main Content
ASME Press Select Proceedings

International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions

Editor
B. P. Somerday
B. P. Somerday
Search for other works by this author on:
P. Sofronis
P. Sofronis
Search for other works by this author on:
ISBN:
9780791860298
No. of Pages:
844
Publisher:
ASME Press
Publication date:
2014

A 3D finite cohesive element approach has been developed and applied in order to simulate the crack initiation of hydrogen-induced fracture. A single edge notched tension specimen of an API X70 weld heat affected zone was modeled. The results were compared to a similar 2D model and the cohesive parameters were calibrated to fit the experimental results. Under the same levels of global stresses, the three dimensional simulations gave higher results in terms of opening stress at the stress peak, plastic strain levels at the crack tip and hydrogen lattice concentration, as well as faster diffusion, when compared with bi-dimensional simulations. The best fit to the experimental data was obtained for a critical opening of 0.3 mm and initial critical cohesive strength of 1840 MPa and 1620 MPa for the 2D and 3D simulation, respectively.

This content is only available via PDF.
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal