Multiscale simulations for fracture prediction in composite materials: extension for anisotropic microstructures

Multiscale simulations for fracture prediction in composite materials: extension for anisotropic microstructures

SUAREZ MILLAN, RUBEN (TU Delft Aerospace Engineering)

Turteltaub, S.R. (mentor)

Delft University of Technology

Aerospace Engineering

2018-12-13

With a fast increasing use of composite materials in aerostructures, industry demands design tools capable to reduce experimental tests while providing reliable data. Multiscale simulations enable to model and analyze fracture processes at the microscale, thus delivering higher accuracy and fundamental information about crack processes which phenomenological models cannot capture. This thesis studies fracture processes developing of composite laminates and the influence of anisotropy in fracture simulations of microstructural domains. Moreover, in the context of an in-house developed multiscale framework, several contributions have been done towards obtaining of Hill-Mandel compliant Effective Tractions Separation Laws. Namely, crack-path integration has been corrected and two energy-consistent homogenization methods have been proposed. Finally, results are given verifying the new methods, and it is found that periodic boundary conditions have an influence on the results upon crack localization.

multiscale methods
composites
fracture mechanics
Abaqus
CZM

http://resolver.tudelft.nl/uuid:a0c63ad9-ce02-4cc8-9264-c66d35ec8fa1

Student theses

master thesis

© 2018 RUBEN SUAREZ MILLAN