128 citations · 427 across the 13 of their papers we have counts for
14 papers
Yield and Buckling Stress Limits in Topology Optimization of Multiscale Structures
Christoffer Fyllgraf Christensen, Fengwen Wang, Ole Sigmund
This study presents an extension of multiscale topology optimization by integrating both yield stress and local/global buckling considerations into the design process. Building upo…
Topology optimization of high-performance optomechanical resonator
Yincheng Shi, Fengwen Wang, Dennis Høj +2
High quality mechanical resonators are critical for driving advances in quantum information technologies, precision sensing, and optomechanics. However, achieving compact resonator…
Extremal Structures with Embedded Pre-Failure Indicators
Christoffer Fyllgraf Christensen, Jonas Engqvist, Fengwen Wang +2
Preemptive identification of potential failure under loading of engineering structures is a critical challenge. Our study presents an innovative approach to built-in pre-failure in…
Topology Optimization of Multiscale Structures Considering Local and Global Buckling Response
Christoffer Fyllgraf Christensen, Fengwen Wang, Ole Sigmund
Much work has been done in topology optimization of multiscale structures for maximum stiffness or minimum compliance design. Such approaches date back to the original homogenizati…
Architecting materials for extremal stiffness, yield and buckling strength
Fengwen Wang, Ole Sigmund
This paper proposes a methodology for architecting microstructures with extremal stiffness, yield, and buckling strength using topology optimization. The optimized microstructures…
Buckling and yield strength estimation of architected materials under arbitrary loads
Morten N. Andersen, Yiqiang Wang, Fengwen Wang +1
Buckling strength estimation of architected materials has mainly been restricted to load cases oriented along symmetry axes. However, realistic load scenarios normally exhibit more…
Ultra-coherent nanomechanical resonators based on inverse design
Dennis Høj, Fengwen Wang, Wenjun Gao +3
Engineered micro- and nanomechanical resonators with ultra-low dissipation constitute the ideal systems for applications ranging from high-precision sensing such as magnetic resona…
3D architected isotropic materials with tunable stiffness and buckling strength
Fengwen Wang, Ole Sigmund
This paper presents a class of 3D single-scale isotropic materials with tunable stiffness and buckling strength obtained via topology optimization and subsequent shape optimization…
On the competition for ultimately stiff and strong architected materials
Morten N. Andersen, Fengwen Wang, Ole Sigmund
Advances in manufacturing techniques may now realize virtually any imaginable microstructures, paving the way for architected materials with properties beyond those found in nature…
Designing Photonic Topological Insulators with Quantum-Spin-Hall Edge States using Topology Optimization
Rasmus E. Christiansen, Fengwen Wang, Ole Sigmund +1
Designing photonic topological insulators is highly non-trivial because it requires inversion of band symmetries around the band gap, which was so far done using intuition combined…
Topological Insulators by Topology Optimization
Rasmus E. Christiansen, Fengwen Wang, Ole Sigmund
An acoustic topological insulator (TI) is synthesized using topology optimization, a free material inverse design method. The TI appears spontaneously from the optimization process…
Maximizing the quality factor to mode volume ratio for ultra-small photonic crystal cavities
Fengwen Wang, Rasmus Ellebæk Christiansen, Yi Yu +2
Small manufacturing-tolerant photonic crystal cavities are systematically designed using topology optimization to enhance the ratio between quality factor and mode volume, Q/V. For…
Benchmarking five numerical simulation techniques for computing resonance wavelengths and quality factors in photonic crystal membrane line defect cavities
Jakob Rosenkrantz de Lasson, Lars Hagedorn Frandsen, Philipp Gutsche +10
We present numerical studies of two photonic crystal membrane microcavities, a short line-defect cavity with relatively low quality () factor and a longer cavity with high .…
Fundamental limitations to gain enhancement in periodic media and waveguides
Jure Grgić, Johan Raunkjær Ott, Fengwen Wang +4
A common strategy to compensate for losses in optical nanostructures is to add gain material in the system. By exploiting slow-light effects it is expected that the gain may be enh…