Bimodal nanostructured (NS) metals possess both ultrahigh strength and good ductility. It is the nanograined (NG) matrix phase that leads to their ultrahigh strength and the coarse-grained (CG) inclusion phase that renders their good ductility. But the overall strength and ductility can also be significantly affected by the behavior of the interface regions. In this study, we employ a cohesive finite-element method to investigate the tensile fracture process of the bimodal NS Cu that includes the interface effects. We develop three types of cohesive elements in the bimodal NS Cu: (i) cohesive elements in the CG phase, (ii) those in the NG phase, and (iii) those at the CG–NG interface. Our objective is to uncover how the strength and ductility of the bimodal NS Cu can be affected by the interface property. In this process, we will also examine how the distribution and shape of the CG inclusions can contribute to the variation of the tensile fracture behavior of the bimodal NS Cu. By an extensive simulation, we find that, even at the small ratio of 1.6% of interface cohesive elements to all cohesive elements, a small change in the cohesive strength of interface elements could lead to a significant change in the overall strength and ductility. We also find that, when the cohesive strength of interface elements exceeds a certain level, the strength and ductility of the bimodal NS Cu will reach a saturation state.
Acta Mechanica – Springer Journals
Published: May 30, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera