Topology Optimization of Flow-based Problems, Feb 23, 2021

We are pleased to announce the program of the 10th TOP Webinar, a thematic session on “Topology Optimization of Flow-based Problems”. It is scheduled for Feb 23, 2021, Tuesday. 16:00 – 17:30 pm CET.

Please register at this link.
This event will also be livestreamed on YouTube with this permanent link.


Host
Joe Alexandersen, University of Southern Denmark

1. “3D topology optimization of heat sinks for liquid cooling” (15 min presentation + 5 min questions)
Sicheng Sun, Piotr Liebersbach, Xiaoping Qian – University of Wisconsin-Madison
Applied Thermal Engineering (2020)
https://doi.org/10.1016/j.applthermaleng.2020.115540

2. “Three-dimensional topology optimization of thermal-fluid-structural problems for cooling system design” (15 min presentation + 5 min questions)
Minghao Yu, Shilun Ruan, Junfeng Gu, Mengke Ren, Zheng Li, Xinyu Wang & Changyu Shen – Dalian University of Technology
Structural and Multidisciplinary Optimization (2020)
https://doi.org/10.1007/s00158-020-02731-z

3. “Topology optimization of two fluid heat exchangers” (15 min presentation + 5 min questions)
Lukas Christian Høghøj, Daniel Ruberg Nørhave, Joe Alexandersen, Ole Sigmund, Casper Schousboe Andreasen – Technical University of Denmark
International Journal of Heat and Mass Transfer (2020)
https://doi.org/10.1016/j.ijheatmasstransfer.2020.120543

4. “Body-fitted topology optimization of 2D and 3D fluid-to-fluid heat exchangers” (15 min presentation + 5 min questions)
Florian Feppon, Grégoire Allaire, Charles Dapogny, Pierre Jolivet – École Polytechnique
Computer Methods in Applied Mechanics and Engineering (2021)
https://doi.org/10.1016/j.cma.2020.113638

We are looking forward to meeting you online soon!

Data-driven Approaches in Topology Optimization (DATO), January 26, 2021

Happy new year and best wishes for 2021!

We start this year with a thematic session of TOP Webinar on “Data-driven Approaches in Topology Optimization” (DATO). It is scheduled for January 26, 2021, Tuesday. 16:00 – 17:30 pm CET, (i.e., 9:00 – 10:30 am Chicago, 10:00 – 11:30 am New York, 7:00 – 8:30 am Los Angeles, 23:00 – 01:30 am Beijing, Jan. 27, 2:00 – 3:30 am Sydney).

Please register at this link. This event will also be livestreamed on YouTube with this permanent link.

Program

Host:
Wei Chen (Northwestern University)
Shelly Zhang (University of Illinois at Urbana Champaign)

1 – Ying Zhou, Queensland University of Technology, Australia
A new data-driven topology optimization framework for structural optimization.
Ying Zhou, Haifei Zhan, Weihong Zhang*, Jihong Zhu, Jinshuai Bai, Qingxia Wang, Yuantong Gu*. Computers & Structures (2020), 239, 106310.
https://doi.org/10.1016/j.compstruc.2020.106310

2 – Yongmin Liu, Northeastern University, USA
Probabilistic Representation and Inverse Design of Metamaterials Based on a Deep Generative Model with Semi-Supervised Learning Strategy.
W Ma, Feng Cheng, Yihao Xu, Qinlong Wen, and Yongmin Liu*.Advanced Materials (2019), 31 (39), 1901111.
https://doi.org/10.1002/adma.201901111

3 – Glaucio Paulino, Georgia Institute of Technology, USA
Universal machine learning for topology optimization.
Heng Chi, Yuyu Zhang, Tsz Ling Elaine Tang, Lucia Mirabella, Livio Dalloro, Le Song, Glaucio H. Paulino*. Computer Methods in Applied Mechanics and Engineering (2021), to appear.
https://doi.org/10.1016/j.cma.2019.112739

4 – Stefano Zapperi, University of Milan, Italy
Automatic design of mechanical metamaterial actuators.
Bonfanti, Silvia, Roberto Guerra, Francesc Font Clos, Daniel Rayneau-Kirkhope, and Stefano Zapperi*. Nature Communications (2020), 11, 4162.
https://doi.org/10.1038/s41467-020-17947-2

5 – Liwei Wang, Northwestern University, USA
Deep generative modeling for mechanistic-based learning and design of metamaterial systems.
Liwei Wang, Yu-Chin Chan, Faez Ahmed, Zhao Liu, Ping Zhu, Wei Chen*. Computer Methods in Applied Mechanics and Engineering(2020), 372, 113377. https://doi.org/10.1016/j.cma.2020.113377

TOP Webinar 8, Dec. 17, 2020, Thursday, CET 16:00-17:30

We are pleased to announce the program of the 8th Top Webinar, which is scheduled for 17th December, CET 16:00-17:30. Please register at this link. This event will also be livestreamed on YouTube with this permanent link.

Program

Host: Shinji Nishiwaki (Kyoto University, Japan)

1 – Kazuhiro Izui, Kyoto University, Japan
Isogeometric topology optimization of anisotropic metamaterials for controlling high‐ frequency electromagnetic wave
Shinnosuke Nishi, Takayuki Yamada, Kazuhiro Izui (Kyoto University, Japan), Shinji Nishiwaki (Kyoto University, Japan), Kenjiro Terada
International Journal for Numerical Methods in Engineering (2020), 121 (6), 1218-1247
https://doi.org/10.1002/nme.6263

2 – Akihiro Takezawa, Waseda University, Japan
Sensitivity analysis and lattice density optimization for sequential inherent strain method used in additive manufacturing process
Akihiro Takezaw (Waseda University), Albert C. To, Qian Chen, Xuan Liang, Florian Dugast, Xiaopeng Zhang, Mitsuru Kitamura
Computer Method in Applied Mechanics and Engineering (2020), 370, 113231.
https://doi.org/10.1016/j.cma.2020.113231

3 – Jeonghoon Yoo, Yonsei University, Korean
Single variable-based multi-material structural optimization considering interface behavior
Cheolwoong Kim, Hong Kyoung Seong, Il Yong Kim, Jeonghoon Yoo (Yonsei University)
Computer Method in Applied Mechanics and Engineering (2020), 367, 113114
https://doi.org/10.1016/j.cma.2020.113114

4 – Martin-Pierre Schmidt, R&D SIMULIA, France
Structural topology optimization with smoothly varying fiber orientation
Martin-Pierre Schmidt (R&D SIMULIA), Laura Couret, Christian Gout, Claus B. W. Pedersen
Structural and Multidisciplinary Optimization volume (2020), 62, 3105–3126
https://doi.org/10.1007/s00158-020-02657-6

5 – Renato Picelli, University of São Paulo, Brazil
Topology optimization of binary structures under design-dependent fluid-structure interaction loads
R. Picelli (University of São Paulo), S. Ranjbarzadeh, R. Sivapuram, R. S. Gioria, E. C. N. Silva
Structural and Multidisciplinary Optimization volume (2020), 62, 2101–2116
https://doi.org/10.1007/s00158-020-02598-0

We are looking forward to meeting you online soon!

TOP Webinar 7, Nov. 24, 2020, Tuesday, CET 16:00-17:30

We are pleased to announce the program of the 7th Top Webinar, which is scheduled for 24th November, CET 16:00-17:30. Please register at this link. This event will also be live-streamed on YouTube with this permanent link.

Host: Julian Norato (University of Connecticut)

1- Seth Watts
Computational Engineering Division
Lawrence Livermore National Laboratory (USA)
Paper: Watts, S., Arrighi, W., Kudo, J., Tortorelli, D. A., & White, D. A. (2019). Simple, accurate surrogate models of the elastic response of three-dimensional open truss micro-architectures with applications to multiscale topology design. Structural and Multidisciplinary Optimization, 60(5), 1887-1920.

2- Tsuyoshi Nomura
Applied Mathematics Research Domain
Toyota Central R&D Labs (Japan)
Paper: Nomura, T., Kawamoto, A., Kondoh, T., Dede, E. M., Lee, J., Song, Y., & Kikuchi, N. (2019). Inverse design of structure and fiber orientation by means of topology optimization with tensor field variables. Composites Part B: Engineering, 176, 107187.

3- Mattias Schevenels
Professor, Department of Architecture, KU Leuven (Belgium)
Paper: Pellens, J., Lombaert, G., Michiels, M., Craeghs, T., & Schevenels, M. (2020). Topology optimization of support structure layout in metal-based additive manufacturing accounting for thermal deformations. Structural and Multidisciplinary Optimization, 61(6), 2291-2303.

4- Natasha Vermaak
Associate Professor, Lehigh University (USA)
Paper: Jia, X., Grejtak, T., Krick, B., & Vermaak, N. (2020). Topology optimization of tribological composites for multifunctional performance at sliding interfaces. Composites Part B: Engineering, 199, 108209.

5- Bin Niu
Associate Professor, Manufacturing Technology Institute, Dalian University of Technology (China)
Paper: Niu, B., Shan, Y., & Lund, E. (2019). Discrete material optimization of vibrating composite plate and attached piezoelectric fiber composite patch. Structural and Multidisciplinary Optimization, 60(5), 1759-1782.

Large-scale and Efficient Topology Optimization Approaches, October 29, 2020

Large-scale and Efficient Topology Optimization Approaches

1st Thematic Session @ 6th TOP Webinar – www.top-webinar.org

October 29, 2020, Thursday, CET* (UTC+1:00) 16:00-17:30.

We are pleased to announce the program for the first thematic session on Large-scale and efficient topology optimization (TO) approaches at the sixth edition of the TOP Webinar (www.top-webinar.org), scheduled for October 29, 2020, Thursday, CET 16:00-17:30. The thematic session covers several sub-topics and we will hear of Large-scale TO using high performance computing, Large-scale TO using sparse grids, efficient TO in Matlab and how to treat hundreds of millions of local constraints. There will be plenty of time for Q&A after the presentations and we are looking forward to seeing all of you there!

* Please note this time in your time zone might be different from previous TOP Webinars, due to the transition from European daylight-saving time. For your reference, CET 16:00 on Oct 29th is 8:00 Los Angeles, 11:00 New York, 23:00 Beijing, 2:00 (+1) Sydney.

Click here to register

Figure 1: Illustrations covering some of the results you can expect to learn more about at the 6th TOP Webinar.

Program:

Host: Niels Aage (Technical University of Denmark)

Dr. Boyan S. Lazarov on large-scale topology optimization using high performance computing: preconditioners. The presentation is based on Zambrano, M., Serrano, S., Lazarov, B. S. (Lawrence Livermore National Laboratory), & Galvis, J. (2020). Fast multiscale contrast independent preconditioners for linear elastic topology optimization problems. Retrieved from http://arxiv.org/abs/2006.13387

Dr. Federico Ferrari on efficient and easily accessible Matlab code for topology optimization. The presentation is based on Ferrari, F. (John Hopkins University), & Sigmund, O. (2020). A new generation 99 line Matlab code for compliance topology optimization and its extension to 3D.Structural and Multidisciplinary Optimization, 62(4), 2211–2228. https://doi.org/10.1007/s00158-020-02629-w

Mr. Yuanming Hu on single-computer giga-voxel topology optimization using a narrow-band sparse grid. The presentation is based on  Liu, H., Hu, Y. (CSAIL-MIT), Zhu, B., Matusik, W., & Sifakis, E. (2019). Narrow-band topology optimization on a sparsely populated grid. ACM Transactions on Graphics, 37(6), 1–14. https://doi.org/10.1145/3272127.3275012

Dr. Gustavo da Silva on the augmented Lagrangian approach for hundreds of millions of constraints. The presentation is based on da Silva, G. A. (University of São Paulo), Aage, N., Beck, A. T., & Sigmund, O. (2020). Three‐dimensional manufacturing tolerant topology optimization with hundreds of millions of local stress constraints. International Journal for Numerical Methods in Engineering, online first. https://doi.org/10.1002/nme.654

Click here to register

Some adaptations of the webinar format

It has been five successful sessions! Thanks to our hosts, speakers, and participants (via Zoom or YouTube) all over the world. We have received valuable suggestions and comments, and are working on adapting the format.

  • In future sessions, all speakers have the same amount of time for presenting their work, i.e., 15 minutes, including a short Q&A. Previously it was 10 minutes. This extension could allow some elaboration on the idea, without going too much to the details. (We will no longer designate a keynote.)
  • We are launching thematic sessions, i.e., focusing on a specific (but broad) topic. The sessions alternate between thematic and general ones. The first thematic session is on Large-scale and efficient topology optimization approaches, scheduled for 29th Oct. Future topics include data-driven approaches, topology optimization for (advanced) manufacturing, multi-scale approaches, multi-physics problems, etc.

Finally, you may have noticed that slides from many speakers are available under ‘Past Webinars’. On this page, you also find links to video archives on YouTube and Bilibili. In the videos, chats before the official start are trimmed.

TOP Webinar 5, Sep. 22, 2020, Tuesday, CEST 16:00-17:30

We are pleased to announce the program of the fifth edition of the TOP Webinar (www.top-webinar.org), scheduled for September 22, 2020, Tuesday, CEST 16:00-17:30.
(For your reference, CEST 16:00, i.e., 7:00 Los Angeles, 10:00 New York, 22:00 Beijing, 24:00 Sydney)

Program

Host: Qing Li (University of Sydney)

Stress-based shape and topology optimization with cellular level set in B-splines
Yelin Song, Qingping Ma, Yu He, Mingdong Zhou, Michael Yu Wang (Hong Kong University of Science and Technology, China)
Struct Multidisc Optim (2020)
https://doi.org/10.1007/s00158-020-02610-7

Isogeometric topology optimization of anisotropic metamaterials for controlling high‐ frequency electromagnetic wave
Shinnosuke Nishi, Takayuki Yamada, Kazuhiro Izui, Shinji Nishiwaki (Kyoto University, Japan), Kenjiro Terada
International Journal for Numerical Methods in Engineering (2020), 121 (6), 1218-1247
https://doi.org/10.1002/nme.6263

Topology Optimization of Conformal Structures on Manifolds Using Extended Level Set Methods (X-LSM) and Conformal Geometry Theory
Qian Ye, Yang Guo, Shikui Chen (Stony Brook University, USA), Na Lei, Xianfeng Gu
Computer Methods in Applied Mechanics and Engineering (2019), 344: 164-185
https://doi.org/10.1016/j.cma.2018.08.045

Optimal design of shell-graded-infill structures by a hybrid MMC-MMV approach
Chang Liu, Zongliang Du, Yichao Zhu, Weisheng Zhang, Xiaoyu Zhang, Xu Guo (Dalian University of Technology, China)
Computer Methods in Applied Mechanics and Engineering (2020), 369: 113187
https://doi.org/10.1016/j.cma.2020.113187

Topology optimization of dynamic acoustic–mechanical structures using the ersatz material model
Jie Hu, Song Yao, Xiaodong Huang (Swinburne University of Technology, Australia)
Computer Methods in Applied Mechanics and Engineering (2020), 372, 113387
https://doi.org/10.1016/j.cma.2020.113387

Registration

The webinar takes place online, on Zoom. Please register here.
After registering, you will receive a confirmation email containing information about joining the webinar. In the confirmation email, you will also find a link to add the event to your calendar.
Registration is free, and takes a few seconds.

The event will be live-streamed on YouTube, with this link

Fourth edition, August 27, 2020, Thursday, CEST 16:00-17:30

We are pleased to announce the program of the fourth edition of the TOP Webinar (www.top-webinar.org), scheduled for August 27, 2020, Thursday, CEST 16:00-17:30.
(For your reference, CEST 16:00, i.e., 7:00 Los Angeles, 10:00 New York, 22:00 Beijing, 24:00 Sydney)

Program

Host: James K. Guest (Johns Hopkins University)

Keynote
Mixed projection- and density-based topology optimization with applications to structural assemblies
Nicolò Pollini & Oded Amir, (Technion – Israel Institute of Technology)
https://link.springer.com/article/10.1007%2Fs00158-019-02390-9

Adaptive level set topology optimization using hierarchical B-splines
Lise Noël (University of Colorado at Boulder), M. Schmidt, C. Messe, J.A. Evans & K. Maute
https://link.springer.com/article/10.1007%2Fs00158-020-02584-6

Stochastic approaches to generating diverse and competitive structural designs in topology optimization
Yunzhen He, Kun Cai, Zi-Long Zhao, Yi Min Xie (RMIT University) https://www.sciencedirect.com/science/article/pii/S0168874X20300792?via%3Dihub

Thermomechanical topology optimization of shape‐memory alloy structures using a transient bilevel adjoint method
Ziliang Kang, Kai A. James (University of Illinois)
https://onlinelibrary.wiley.com/doi/full/10.1002/nme.6319

Topology optimization of heat sinks for instantaneous chip cooling using a transient pseudo-3D thermofluid model
Tao Zeng, Hu Wang, Mengzhu Yang, Joe Alexandersen (University of Southern Denmark)
https://www.sciencedirect.com/science/article/pii/S0017931019361861?via%3Dihub

Registration

The webinar takes place online, on Zoom. Please register here.
After registering, you will receive a confirmation email containing information about joining the webinar. In the confirmation email, you will also find a link to add the event to your calendar.
Registration is free, and takes a few seconds.

The event will be live-streamed on YouTube, with this link

Video of TOP Webinar 3

It is great to see so many of you during the summer vacation period! A special thanks goes to Niels, for sparing your hours on a beach (!?) to set up the zoom meeting and YouTube streaming. We thank our hosts Profs. Cheng and Guo, our speakers, and of course our participants around the world for joining us.

Below please find the recorded video of the third TOP Webinar.

You can also watch the same video on bilibili.
YouTube Preview Image

Third edition, July 21, 2020, Tuesday, CEST 16:00-17:30

We are pleased to announce the program of the third edition of the TOP Webinar (www.top-webinar.org), scheduled for July 21, 2020, Tuesday, CEST 16:00-17:30.
(For your reference, CEST 16:00, i.e., 7:00 Los Angeles, 10:00 New York, 22:00 Beijing, 24:00 Sydney)

Program

Host: Gengdong Cheng and Xu Guo (Dalian University of Technology)

Keynote
Simultaneous optimization of build orientation and topology for additive manufacturing
Cunfu Wang, Xiaoping Qian (University of Wisconsin-Madison)
https://doi.org/10.1016/j.addma.2020.101246

Design of phononic-like structures and band gap tuning by concurrent two-scale topology optimization
Xuan Liang, Jianbin Du (Tsinghua University)
https://doi.org/10.1007/s00158-020-02489-4

Topology optimization of fluidic pressure-loaded structures and compliant mechanisms using the Darcy method
Prabhat Kumar, Jan S Frouws, Matthijs Langelaar (TU Delft)
https://doi.org/10.1007/s00158-019-02442-0

Multifidelity design guided by topology optimization
Kentaro Yaji (Osaka University), Shintaro Yamasaki, Kikuo Fujita
https://doi.org/10.1007/s00158-019-02406-4

A strategy based on the strain‐to‐kinetic energy ratio to ensure stability and convergence in topology optimization of globally resonating one‐material structure
Olavo M. Silva (Federal University of Santa Catarina), Miguel M. Neves
https://doi.org/10.1002/nme.6374

Registration

The webinar takes place online, on Zoom. Please register here.
https://dtudk.zoom.us/meeting/register/u5csf-uurjsqGNEruO8vzYHFfk4VEc1Et-m4
After registering, you will receive a confirmation email containing information about joining the webinar. In the confirmation email, you will also find a link to add the event to your calendar.
Registration is free, and takes a few seconds.

We have taken actions to host more participants. The capacity of our Zoom meeting is increased from 300 to 500 participants. Meanwhile, we expect to live-streame the event on YouTube, with this link.