TY - JOUR
T1 - A thermo–chemo–mechanically coupled constitutive model for curing of glassy polymers
AU - Sain, Trisha
AU - Loeffel, Kaspar
AU - Chester, Shawn
N1 - Funding Information:
TS acknowledges support from Michigan Technological University Mechanical Engg.-Engg. Mechanics Department for the financial support through start-up grant. SAC acknowledges partial support from the National Science Foundation ( CMMI-1463121 ) and an ASME AMD Haythornthwaite Research Initiation Grant.
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/7
Y1 - 2018/7
N2 - Curing of a polymer is the process through which a polymer liquid transitions into a solid polymer, capable of bearing mechanical loads. The curing process is a coupled thermo–chemo–mechanical conversion process which requires a thorough understanding of the system behavior to predict the cure dependent mechanical behavior of the solid polymer. In this paper, a thermodynamically consistent, frame indifferent, thermo–chemo–mechanically coupled continuum level constitutive framework is proposed for thermally cured glassy polymers. The constitutive framework considers the thermodynamics of chemical reactions, as well as the material behavior for a glassy polymer. A stress-free intermediate configuration is introduced within a finite deformation setting to capture the formation of the network in a stress-free configuration. This work considers a definition for the degree of cure based on the chemistry of the curing reactions. A simplified version of the proposed model has been numerically implemented, and simulations are used to understand the capabilities of the model and framework.
AB - Curing of a polymer is the process through which a polymer liquid transitions into a solid polymer, capable of bearing mechanical loads. The curing process is a coupled thermo–chemo–mechanical conversion process which requires a thorough understanding of the system behavior to predict the cure dependent mechanical behavior of the solid polymer. In this paper, a thermodynamically consistent, frame indifferent, thermo–chemo–mechanically coupled continuum level constitutive framework is proposed for thermally cured glassy polymers. The constitutive framework considers the thermodynamics of chemical reactions, as well as the material behavior for a glassy polymer. A stress-free intermediate configuration is introduced within a finite deformation setting to capture the formation of the network in a stress-free configuration. This work considers a definition for the degree of cure based on the chemistry of the curing reactions. A simplified version of the proposed model has been numerically implemented, and simulations are used to understand the capabilities of the model and framework.
KW - A. chemo-mechanical processes
KW - A. thermo-mechanical process
KW - B. elastic-viscoplastic material
KW - B. finite strain
KW - Chemical reaction
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U2 - 10.1016/j.jmps.2018.04.001
DO - 10.1016/j.jmps.2018.04.001
M3 - Article
AN - SCOPUS:85045454432
SN - 0022-5096
VL - 116
SP - 267
EP - 289
JO - Journal of the Mechanics and Physics of Solids
JF - Journal of the Mechanics and Physics of Solids
ER -