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Sunday, 23 February 2020
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Raw materials & technologies, Technologies

Discrete element method to predict the mechanical properties of pigmented coatings

Thursday, 16 January 2020

A recent study proposes a discrete element method (DEM) to predict the mechanical properties of paper coating layers that have a range of starch and latex content.

A discrete element method is proposed to predict the mechanical properties of paper coating layers. Image source: Sarah Hofmann - stock.adobe.com. (Symbol image)
A discrete element method is proposed to predict the mechanical properties of paper coating layers. Image source: Sarah Hofmann - stock.adobe.com....

The mechanical properties of pigmented coating layers are important in a variety of applications. However, the large number of parameters that influence these properties as well as the numerous types of deformations challenge the prediction of the performance of these systems.

Model is adapted to tensile and flexural deformations

Scientists propose a discrete element method (DEM) to predict the mechanical properties of paper coating layers that have a range of starch and latex content. The model is developed in both 2D and 3D and is adapted to tensile and flexural deformations. The model predictions are compared to experimental results in the literature.

The predictions are generally good for the moduli and the strain at failure of the systems, but underpredict the maximum stress. This result may be caused by the complex particle size distribution of the experimental systems or by the impact of the brittleness of the starch when making the freestanding films.

The study can be founce in Journal of Coatings Technology and Research, Volume 16.

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