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Lecture

WEB Instabilities and pattern formations in soft composites

Wednesday (23.09.2020)
17:35 - 17:50 S: Structural Materials 2
Part of:


Elastic instability is a fascinating phenomenon playing an important role in pattern formations in soft biological systems. The phenomenon also has been actively used to design new (meta-) materials with switchable microstructures, properties, and functions [1].

Here, we investigate the elastic instability phenomenon in soft heterogeneous materials. These deformable composites typically combine soft deformable matrix and stiffer phase (such as fibers or inclusions). Figure 1 shows the experimentally observed wavy patterns forming in (a) soft 3D printed laminates [2] and (b) 3D-fiber composites [3], (c) twining pattern in particulate composites [4], and (d) auxetic microstructure transformations in inclusion-matrix-void soft systems [5].

 

REFERENCES

[1] Slesarenko V, Rudykh S. Harnessing viscoelasticity and instabilities for tuning wavy patterns in soft layered composites. Soft Matter Vol. 12, pp. 3677–3682, 2016

[2] Li J, Slesarenko V, Galich PI, Rudykh S. Instabilities and pattern formations in 3D-printed deformable fiber composites. Compos Part B Eng., Vol. 148:114–22. 2018

[3] Li J, Pallicity TD, Slesarenko V, Goshkoderia A, Rudykh S. Domain Formations and Pattern Transitions via Instabilities in Soft Heterogeneous Materials. Adv Mater., Vol. 31, pp.1807309 2019.

[4] Li J, Slesarenko V, Rudykh S. Auxetic multiphase soft composite material design through instabilities with application for acoustic metamaterials. Soft Matter, Vol.14, pp. 6171–6180 2018.

Speaker:
Prof. Stephan Rudykh
University of Wisconsin-Madison

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