Preprint Article Version 1 This version is not peer-reviewed

DECM: A Discrete Element for Multiscale Modeling of Composite Materials Using the Cell Method

Version 1 : Received: 2 December 2019 / Approved: 3 December 2019 / Online: 3 December 2019 (03:47:25 CET)

How to cite: Ferretti, E. DECM: A Discrete Element for Multiscale Modeling of Composite Materials Using the Cell Method. Preprints 2019, 2019120014 (doi: 10.20944/preprints201912.0014.v1). Ferretti, E. DECM: A Discrete Element for Multiscale Modeling of Composite Materials Using the Cell Method. Preprints 2019, 2019120014 (doi: 10.20944/preprints201912.0014.v1).

Abstract

This paper deals with a DEM (Discrete Element Method) approach of the Cell Method (CM), useful for providing a multiscale modeling of composite materials. The new numerical model, called DECM, combines the main features of both the DEM and the CM. In particular, it offers the same degree of detail as the CM, on the microscale, and manages the discrete elements individually such as the DEM—allowing finite displacements and rotations—on the macroscale. Moreover, the DECM is able to activate crack propagation until complete detachment and automatically recognizes new contacts. Unlike other DEM approaches for modeling failure mechanisms in a continuum, the DECM does not require prior knowledge of the failure position. Furthermore, the DECM solves the problems in the space domain directly. Therefore, it does not require any dynamic relaxation techniques to obtain the static solution. For the sake of example, the paper shows the results offered by the DECM for axial and shear loading of a composite two-dimensional domain with periodic round inclusions. The paper also offers some insights into how the inclusions modify the stress field into composite continua.

Subject Areas

Discrete Element Method (DEM); Cell Method (CM); multiscale modeling; periodic composite materials; nonlocality

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