TY - GEN
T1 - Mechanical characterization and preliminary modeling of PEEK
AU - Li, Wenlong
AU - Brown, Eric N.
AU - Rae, Philip J.
AU - Gazonas, George
AU - Negahban, Mehrdad
N1 - Funding Information:
The research has been partially supported by the US Army Research Laboratory through Contract Number W911NF-11-D-0001-0094. The experiments performed during this project were completed by utilizing the stress analysis center facility of the University of Nebraska-Lincoln.
Publisher Copyright:
© The Society for Experimental Mechanics, Inc. 2016.
PY - 2016
Y1 - 2016
N2 - Poly-ether-ether-ketone (PEEK) is a high-performance semi-crystalline polymer with mechanical and thermal stability characteristics that are superior to most tough polymers. The mechanical characteristics of this polymer are modeled over a broad range of mechanical loading conditions using a thermodynamically consistent modeling process. This preliminary model, which ignores the thermal response and the possible recrystallization of this material during loading, shows an outstanding ability to capture the multidimensional nonlinear response of PEEK up to 60% compression, with loading rates from 0.0001 to 3000 1/s at room temperature. The model includes the measured anisotropy in the wave response that develops with plastic flow, captures the evolution of the measured equilibrium stress, and correctly matches the evolution of the tangent modulus at equilibrium. This broad range of rates and experimental conditions are achieved by using a two-element nonlinear thermodynamically-consistent model.
AB - Poly-ether-ether-ketone (PEEK) is a high-performance semi-crystalline polymer with mechanical and thermal stability characteristics that are superior to most tough polymers. The mechanical characteristics of this polymer are modeled over a broad range of mechanical loading conditions using a thermodynamically consistent modeling process. This preliminary model, which ignores the thermal response and the possible recrystallization of this material during loading, shows an outstanding ability to capture the multidimensional nonlinear response of PEEK up to 60% compression, with loading rates from 0.0001 to 3000 1/s at room temperature. The model includes the measured anisotropy in the wave response that develops with plastic flow, captures the evolution of the measured equilibrium stress, and correctly matches the evolution of the tangent modulus at equilibrium. This broad range of rates and experimental conditions are achieved by using a two-element nonlinear thermodynamically-consistent model.
KW - Anisotropic elasticity
KW - Equilibrium stress
KW - Mechanical modelling
KW - Plastic flow
KW - Poly-ether-ether-ketone (PEEK)
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U2 - 10.1007/978-3-319-21762-8_25
DO - 10.1007/978-3-319-21762-8_25
M3 - Conference contribution
AN - SCOPUS:84952362279
SN - 9783319217611
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 209
EP - 218
BT - Mechanics of Composite and Multifunctional Materials - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics
A2 - Thakre, Piyush R.
A2 - Ralph, Carter
A2 - Silberstein, Meredith
A2 - Singh, Raman
PB - Springer New York LLC
T2 - SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2015
Y2 - 8 June 2015 through 11 June 2015
ER -