Coupled thermal stress simulations of ductile tearing

Journal Article · Mon Feb 29 23:00:00 EST 2016 · International Journal of Fracture

DOI: https://doi.org/10.1007/s10704-016-0093-y · OSTI ID:1251630

Neilsen, Michael K. ^[1]; Dion, Kristin ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Predictions for ductile tearing of a geometrically complex Ti-6Al-4V plate were generated using a Unified Creep Plasticity Damage model in fully coupled thermal stress simulations. Uniaxial tension and butterfly shear tests performed at displacement rates of 0.0254 and 25.4 mm/s were also simulated. Results from these simulations revealed that the material temperature increase due to plastic work can have a dramatic effect on material ductility predictions in materials that exhibit little strain hardening. Furthermore, this occurs because the temperature increase causes the apparent hardening of the material to decrease which leads to the initiation of deformation localization and subsequent ductile tearing earlier in the loading process.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories, Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC04-94AL85000
• OSTI ID: 1251630
• Report Number(s): SAND--2015-8425J; 607299
• Journal Information: International Journal of Fracture, Journal Name: International Journal of Fracture Journal Issue: 1-2 Vol. 198; ISSN 0376-9429
• Publisher: SpringerCopyright Statement
• Country of Publication: United States
• Language: English