A multiscale damage model for composite materials using a FFT-Based method
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/192765
Tipus de documentText en actes de congrés
Data publicació2013
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
Modeling failure and progressive damage of composite materials presents
a challenging task and is currently subject of many research activities in the field of
computational mechanics. Conventional methods which assume constant material coefficients
or global failure criteria, are in many cases not sufficient to predict the appropriate
mechanical material response. Composite failure occurs as a result of complex mesostructural
damage mechanisms and therefore it is preferable to capture these nonlinear
material effects directly on a finer scale. Hence, recent multiscale modeling and simulation
techniques were developed to consider the mesoscopic material behavior. In this contribution
we propose an alternative multiscale approach similar to FE2. Nonlinear material
effects caused by progressive damage behavior are captured on a finer length scale. The
constituents are modeled explicitly and simple isotropic damage laws are used to describe
the constitutive behavior. Hence, the resulting material response is based on genuine
physical effects and only a few material parameters are required which can be measured
directly in physical experiments. The fine scale problem (material level) is reformulated
into an integral equation of Lippmann-Schwinger type and solved efficiently using the
fast Fourier transformation (FFT). The calculation is carried out on a regular voxel grid
which can be obtained from 3D images like tomographies without using any complicated
mesh generation. Furthermore, the fine scale problem is integrated in a standard Finite
Element framework which is used to solve the macroscopic BVP (component level).
ISBN978-84-941407-6-1
Fitxers | Descripció | Mida | Format | Visualitza |
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Coupled-2013-108_A mutiscale damage model.pdf | 1,015Mb | Visualitza/Obre |