|Title||Tailoring relaxation dynamics and mechanical memory of crumpled materials by friction and ductility|
|Author(s)||Bruggen, Eric Van; Linden, Erik Van Der; Habibi, Mehdi|
|Source||Soft Matter 15 (2019)7. - ISSN 1744-683X - p. 1633 - 1639.|
Physics and Physical Chemistry of Foods
Food Quality and Design
|Publication type||Refereed Article in a scientific journal|
Crumpled sheets show slow mechanical relaxation and long lasting memory of previous mechanical states. By using uniaxial compression tests, the role of friction and ductility on the stress relaxation dynamics of crumpled systems is investigated. We find a material dependent relaxation constant that can be tuned by changing ductility and adhesive properties of the sheet. After a two-step compression protocol, nonmonotonic aging is reported for polymeric, elastomeric and metal sheets, with relaxation dynamics that are dependent on the material's properties. These findings can contribute to tailoring and programming of crumpled materials to get desirable mechanical properties.