Designing Anisotropy in Structures using Topology Optimization
The field of topology optimization is gradually moving from isotropic to anisotropic materials, either using inclusions, such as fibers, or lattice microstructures. In this webinar, we will consider how anisotropic fibers and lattice microstructures can be used in topology optimization.
The first part of the talk will focus on obtaining the maximum stiffness by varying the distribution of an anisotropic fiber material within an isotropic matrix material for given volume fractions of void and material, as well as fiber and matrix, simultaneously. Topological derivatives are utilized for interchanging the isotropic material and void, fiber material and void, or isotropic and fiber materials during iterative optimization. In view of the practical implementation of laying up or 3D printing of fibers within a matrix material, the dense arrangement of fibers is simplified by evenly spacing them while retaining their specific patterns, which are neither periodic nor random.
In the second part of the talk, we will consider how heterogeneity could be exploited in lattice structure optimization. We will show that a variety of anisotropic behaviors can be obtained using optimized lattice units for a single isotropic material.
The methods discussed in this webinar are amenable for integrating within finite element analysis software, such as COMSOL Multiphysics®, and will be described and demonstrated in this talk. We will conclude with a Q&A session.
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This event will be held online.
Date and Time
Indian Institute of Science, Bangalore
G. K. Ananthasuresh is currently a professor and the chair of mechanical engineering at the Indian Institute of Science, Bangalore. His research interests are in compliant mechanisms, topology optimization, microelectromechanical systems, biomechanics, micromanipulation of biological cells, and biomedical devices. His research group, known as Multidisciplinary and Multiscale Design and Devices (M2D2), is involved in many projects with the core theme of mechanics-based design and optimization in multiphysics problems. In addition to interdisciplinary research, his group undertakes many technological innovations. His former students have spun off four startup companies, which include BendFlex (microsensors and compliant devices), Mimyk (medical simulators), SpOvum (fertility chips), and Neu Integral Biomedical (assistive chairs for the elderly and arthritics). In addition, his group is actively pursuing various aspects of topology optimization to fully utilize the capabilities of additive manufacturing.