Frontiers of Materials Award Symposium: Leveraging Materials in Topology Optimization : Session I
Program Organizers: Natasha Vermaak, Lehigh University
Tuesday 8:30 AM
February 25, 2020
Room: 4
Location: San Diego Convention Ctr
8:30 AM Invited
Leveraging Materials in Topology Optimization: Natasha Vermaak1; 1Lehigh University
As reported in the 2019 National Academies Press ‘Frontiers of Materials Research: A Decadal Survey’, topology optimization is pushing the frontiers of architected material design by decoupling and independently optimizing material properties and functionality. Topology optimization offers a mathematical framework to determine the most efficient material layout for prescribed constraints and loading conditions. It offers a framework for accessing unexplored and previously unachievable areas of material-property space. Simultaneously, with the development of Additive Manufacturing (AM) technology, there is enormous potential to design materials and structures, in two and three dimensions, with controlled architecture, topology, and new multifunctional performance. For example, design approaches may include multiple scales, multiple material phases, integration of manufacturing processes and uncertainty. This symposium will feature several invited speakers who are innovating methods and applications of design and topology optimization for materials.
8:50 AM Invited
Multiscale/Level Design of Materials and Structures: H Alicia Kim1; 1University of California San Diego
Our M2DO Lab is developing level set topology optimization methods for multiscale and multiphysics problems leading to optimum multifunctional structures. This presentation will focus on the simultaneous optimization of material and structure that divides a macroscale design domain into subregions that have periodic interconnected microstructures. In this multiscale topology optimization approach, the quantitative benefit of multiscale architecture can be established for coupled multiphysics design problems.
9:30 AM Invited
Topology Optimization for Additive Manufacturing: Albert To1; Hao Deng1; 1University of Pittsburgh
This presentation will feature several topology optimization methods recently developed for designing functionally-graded lattice infill, support structure, and build orientation for laser powder bed additive manufacturing (AM), in order to address various manufacturability and residual stress/distortion issues. An efficient homogenization-based topology optimization method for optimizing the design of functionally-graded lattice infills in AM components for weight savings and performance enhancement will be presented. The motivation for developing this method is to overcome the inability of conventional topology optimization methods to eliminate overhangs that are not self-supporting in AM. The proposed method takes advantage of the self-supporting nature of lattice structures, as well as the tunable thermal and mechanical properties of lattices by varying their strut size. Next, a support structure design optimization method that reduces residual stress and distortion in an AM build is presented. The key novelty of this method lies in the formulation of the modified inherent strain model which enables fast and accurate prediction of part-scale residual stress and deformation resulting from laser processing. The model reduces simulation time to a matter of minutes from hours/days using other existing methods and thus makes it practical to use topology optimization for AM support structure design.
10:10 AM Break
10:30 AM Invited
Nonlinear Composite Materials Design through Multi-material Topology Optimization Frameworks: X. Shelly Zhang1; 1University of Illinois at Urbana Champaign
Topology optimization is a technique for generating optimal shapes of structures. Research in the Zhang Group focuses on exploring topology optimization and additive manufacturing to develop resilient, smart, sustainable, and innovative engineering infrastructure and materials for applications at different scales, from as large as high-rise buildings to as small as material microstructures. Multi-material topology optimization is a practical tool that allows for improved structural designs. Most work in this field has been restricted to linear material behavior with limited constraint settings. To address these issues, a general multi-material topology optimization formulation considering material and geometric nonlinearities is proposed. The formulation handles an arbitrary number of candidate materials with flexible material properties and features a generalized setting of local and global volume constraints.
11:10 AM Invited
Materials, Design and Emerging Objects: Virginia San Fratello1; 1San Jose State University
San Fratello’s research revolves around the convergence of digital, ecological, and building component design in architecture. She believes design for the 21st century absolutely must incorporate sustainable methods and take advantage of local and ecological material resources. In an era of throw away consumerism and over consumption, excessive energy use, too much waste, and toxic materials, designers have a responsibility to the public and the planet, to change our mindset about what our buildings are made of, how they function and to inform the manufacturing processes used to fabricate architecture. This presentation will highlight the innovations from Emerging Objects in their unique approach to materials, sizes, and 3D printing.