Simulations of fracture tests of uncharged and hydrogen-charged additively manufactured 304 stainless steel specimens using cohesive zone modeling

Journal Article · Mon Jan 07 00:00:00 EST 2019 · Engineering Fracture Mechanics

DOI:https://doi.org/10.1016/j.engfracmech.2019.01.006· OSTI ID:1529490

Sung, Shin -Jang ^[1]; Pan, Jwo ^[1]; Korinko, Paul S. ^[2]; Morgan, Michael ^[2]; McWillliams, Anthony ^[2]

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1. Univ. of Michigan, Ann Arbor, MI (United States)
2. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

Fracture tests of uncharged and hydrogen-charged single edge bend specimens of additively manufactured 304 stainless steels are simulated with the cohesive zone modeling (CZM) approach. Two-dimensional plane strain finite element analyses without cohesive elements are conducted to identify the values of cohesive energy. Similar analyses using CZM with the trapezoidal traction-separation laws are then conducted. The best-fit cohesive parameters reflect the values of cohesive strength for the uncharged specimens are higher than those for the hydrogen-charged ones whereas the value of cohesive energy for the uncharged specimens can be either slightly lower or higher than that for the hydrogen-charged ones.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC09-08SR22470
• OSTI ID: 1529490
• Alternate ID(s): OSTI ID: 1527205
• Report Number(s): SRNL-STI--2019-00003
• Journal Information: Engineering Fracture Mechanics, Journal Name: Engineering Fracture Mechanics Journal Issue: C Vol. 209; ISSN 0013-7944
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Additive manufacturing
Cohesive zone modeling
Fracture test
Hydrogen effect
Trapezoidal traction-separation law