MULTISCALE MASS-SPRING MODELS OF CARBON NANOTUBE ARRAYS ACCOUNTING FOR MULLINS-LIKE BEHAVIOR AND PERMANENT DEFORMATION

作者：Blesgen T^*; Fraternali F; Raney J R; Daraio C

来源：Multiscale Modeling and Simulation, 2013, 11(2): 545-565.

DOI：10.1137/12087311X

• carbon nanotube arrays
• bistable springs
• multiscale behavior
• Mullins effect
• permanent deformation

Based on a one-dimensional discrete system of bistable springs, a mechanical model is introduced to describe plasticity and damage in carbon nanotube (CNT) arrays. The energetics of the mechanical system are investigated analytically, the stress-strain law is derived, and the mechanical dissipation is computed, both for the discrete case as well as for the continuum limit. An information-passing approach is developed that permits the investigation of macroscopic portions of the material. As an application, the simulation of a cyclic compression experiment on real CNT foam is performed, considering both the material response during the primary loading path from the virgin state and the damaged response after preconditioning.

• 出版日期2013