Nuwan Dewapriya's blog

Our latest paper, " Exploring the Effects of Temperature, Transverse Pressure, and Strain Rate on Axial Tensile Behavior of Perfect UHMWPE Crystals Using Molecular Dynamics," is accessible freely for 50 days from this link: https://authors.elsevier.com/a/1kT-A4rCEkw1es

The key findings can be summarized as follows:

• Elevated temperatures significantly reduce the strength of UHMWPE crystals, with the reduction in strength being more pronounced than that in modulus. 

Our latest paper, "Developing Mode I Cohesive Traction Laws for Crystalline UHMWPE Interphases Using Molecular Dynamics Simulations," is now freely accessible for the next 50 days from this link: https://authors.elsevier.com/a/1k9Pk3In-v14Go

Our latest paper is accessible freely for 50 days from this link: https://authors.elsevier.com/a/1jiSx7NHxQiuj

Our recent paper is accessible freely for 50 days from this link: https://authors.elsevier.com/a/1iaz87NHxQgzz

Key findings of this paper include a 7-fold strength increase in crystals with chain ends at higher strain rates, a shift in failure mode from chain end sliding to chain scission, and the influence of molecular weight on the failure mode.

In our latest article, “Uncovering stress fields and defects distributions in graphene using deep neural networks”: https://doi.org/10.1007/s10704-023-00704-z , we showed that conditional generative adversarial networks (cGANs) could transform complex deformation fields into stress fields by eliminating the need to evaluate elasticity distributions and develop complex nonlinear constitutive relations.

Our latest article in the Journal of Applied Physics is freely available for 14 days: https://aip.scitation.org/doi/10.1063/5.0072249

 We conducted molecular dynamics simulations of plate impact tests of polyethylene to obtain molecular-level insights on two common approximations associated with the interpretation of shock pressure and spall strength. Our results revealed

(1) The free surface approximation can slightly underpredict the shock pressure in the polymer.

Our latest article “Quantum and classical molecular dynamics simulations of shocked polyurea and polyurethane” is available freely for 50 days from this URL: https://authors.elsevier.com/a/1eJem3In-urdzV

Highlights of the article are as follows:

• Quantum molecular dynamics were used to compute shock Hugoniot data up to 75 GPa.

• The shock response of polyurea and polyurethane are remarkably similar.