Imperial College London
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DrNanLi

Faculty of Engineering, Dyson School of Design Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 8853n.li09 Website

 
 
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Location

 

1M03Royal College of ScienceSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wang:2021:10.1016/j.polymer.2021.123939,
author = {Wang, H and Liu, H and Ding, Z and Li, N},
doi = {10.1016/j.polymer.2021.123939},
journal = {Polymer},
pages = {1--17},
title = {Experimental and constitutive modelling studies of semicrystalline thermoplastics under solid-state stamp forming conditions},
url = {http://dx.doi.org/10.1016/j.polymer.2021.123939},
volume = {228},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Experimental characterisation and constitutive modelling studies on the thermomechanical behaviour of thermoplastics, under solid-state stamp forming conditions, are required for understanding and optimising the stampforming process. In this paper, two semicrystalline thermoplastics, Polyamide 6 (PA6, or Nylon 6) and PolyEther-Ether-Ketone (PEEK) are studied via uniaxial tensile tests at temperatures between their glass transitiontemperatures (Tg ) and melting temperatures (Tm), and at different strain rates (0.001–50 /s). The temperatureand strain rate effects are analysed quantitatively to further understand the thermomechanical response of thesesemicrystalline thermoplastics. The results show that temperature has significant effects on the thermomechanical behaviour of thermoplastic polymers, while the strain rate effects are relatively marginal in theinvestigated strain rate range. In addition, a new physically-based viscoelastic-viscoplastic constitutive model isproposed to simulate the thermomechanical behaviour of both materials. The model shows good predictionaccuracy on tensile stress responses and provides an insight into the microstructural evolution of the semicrystalline thermoplastics; thus, it can be used to analyse solid-state stamp forming of pure semicrystallinethermoplastics and thermoplastic polymer matrix composites (TPMCs).
AU  - Wang,H
AU  - Liu,H
AU  - Ding,Z
AU  - Li,N
DO  - 10.1016/j.polymer.2021.123939
EP  - 17
PY  - 2021///
SN  - 0032-3861
SP  - 1
TI  - Experimental and constitutive modelling studies of semicrystalline thermoplastics under solid-state stamp forming conditions
T2  - Polymer
UR  - http://dx.doi.org/10.1016/j.polymer.2021.123939
UR  - https://www.sciencedirect.com/science/article/pii/S0032386121005620?via%3Dihub
UR  - http://hdl.handle.net/10044/1/89989
VL  - 228
ER  -
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