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Title: A Multiscale Model for the Quasi-Static Thermo-Plastic Behavior of Highly Cross-Linked Glassy Polymers

Journal Article · · Macromolecules
 [1];  [2];  [3];  [4]
  1. Northwestern Univ., Evanston, IL (United States). Dept. of Mechanical Engineering; Bauhaus Univ. Weimar (Germany). Inst. of Structural Mechanics
  2. Northwestern Univ., Evanston, IL (United States). Dept. of Mechanical Engineering
  3. Bauhaus Univ. Weimar (Germany). Inst. of Structural Mechanics; Korea Univ., Seoul (Korea, Republic of). School of Civil, Environmental and Architectural Engineering
  4. Northwestern Univ., Evanston, IL (United States). Dept. of Mechanical Engineering; King Abdulaziz Univ., Jeddah (Saudi Arabia). Distinguished Scientists Program Committee

In this paper, we present experimentally validated molecular dynamics predictions of the quasi- static yield and post-yield behavior for a highly cross-linked epoxy polymer under gen- eral stress states and for different temperatures. In addition, a hierarchical multiscale model is presented where the nano-scale simulations obtained from molecular dynamics were homogenized to a continuum thermoplastic constitutive model for the epoxy that can be used to describe the macroscopic behavior of the material. Three major conclusions were achieved: (1) the yield surfaces generated from the nano-scale model for different temperatures agree well with the paraboloid yield crite- rion, supporting previous macroscopic experimental observations; (2) rescaling of the entire yield surfaces to the quasi-static case is possible by considering Argon’s theoretical predictions for pure compression of the polymer at absolute zero temperature; (3) nano- scale simulations can be used for an experimentally-free calibration of macroscopic con- tinuum models, opening new avenues for the design of materials and structures through multi-scale simulations that provide structure-property-performance relationships.

Research Organization:
Ford Motor Company, Detroit, MI (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); US Air Force Office of Scientific Research (AFOSR); European Commission (EC); The Foundation for Science and Technology (FCT) (Portugal); The Fulbright Program; Network for Computational Nanotechnology (NCN)
Grant/Contract Number:
EE0006867; FA9550-14-1-0032; SFRH/BD/85000/2012
OSTI ID:
1429373
Journal Information:
Macromolecules, Vol. 48, Issue 18; ISSN 0024-9297
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 62 works
Citation information provided by
Web of Science

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