CV

Education

• Ph.D. in Department of Mechanical Science and Bioengineering, Osaka University, Japan, 2025 (expected)
• Young Researchers Exchange Programme between Japan and Switzerland, ETH Zurich, Switzerland, October 2023 - January 2024
• M.E. in Department of Mechanical Science and Bioengineering, Osaka University, Japan, March 2022
• B.E. in Department of Systems Science, Osaka University, Japan, March 2021
• Associate D.E., Department of Mechanical Engineering, National Institute of Technology, Nagano College, Japan, March 2019
• AFS Exchange Program, SMK Seri Badong, Malaysia, 2015

Languages

4: Native, 3: Fluent, 2: Good, 1: Fair

• Japanese —   4
• English —   3
• Malay —   2

• Fortran —   3
• Python —   2
• C —   1
• Linux/Shell —   2

GitHub repository: Today I Learned (TIL)

Publications

Control of static friction by designing grooves on friction surface

W. Iwashita, H. Matsukawa & M. Otsuki, Tribol. Lett. 72, 25 (2024). https://doi.org/10.1007/s11249-023-01822-4

傾斜面上をすべり落ちる水滴に働く摩擦力に水滴量が及ぼす影響 (Effect of drop volume on friction force between sliding water drop and tilting surface)

K. Yanagisawa, C. Saito, W. Iwashita & N. Okumura, J. Jpn. Soc. Tribol. 68 (4), 292-298 (2023) in Japanese. https://doi.org/10.18914/tribologist.22-00021

Static friction coefficient depends on the external pressure and block shape due to precursor slip

W. Iwashita, H. Matsukawa & M. Otsuki, Sci. Rep. 13, 2511 (2023). https://doi.org/10.1038/s41598-023-29764-w

Talks

Dependence of hysteresis friction in viscoelastic material on velocity and viscosity

W. Iwashita & M. Otsuki, The 4th Malaysian International Tribology Conference, The Pacific Sutera Hotel, Kota Kinabalu, Malaysia, Oral presentation, September, 2024

Roles of waviness and groove in control of stiction and slip nucleation

W. Iwashita, M. Castellano & D.S. Kammer, The 26th International Congress of Theoretical and Applied Mechanics (ICTAM 2024), EXCO, Daegu, South Korea, Oral presentation, August, 2024

Theory of friction in macroscopic objects based on continuum analysis

W. Iwashita, H. Matsukawa & M. Otsuki, IUTAM Symposium on Mechanics of Soft Materials and Soft Robots, The University of Tokyo, Japan, Poster presentation, May, 2024

Control of static friction by designing grooves in frictional interface

W. Iwashita, H. Matsukawa & M. Otsuki, 2023 SES Annual Technical Meeting, Hyatt Regency Minneapolis, USA, Oral presentation, October, 2023

Dependence of static friction coefficient on the shape of frictional interface

W. Iwashita, H. Matsukawa & M. Otsuki, 9th International Tribology Conference, Fukuoka 2023 (ITC Fukuoka 2023), Fukuoka International Congress Center, Japan, Oral presentation, September, 2023

Static friction coefficient depends on the external pressure and block shape due to precursor slip: finite element simulation

M. Otsuki, W. Iwashita & H. Matsukawa, 9th International Tribology Conference, Fukuoka 2023 (ITC Fukuoka 2023), Fukuoka International Congress Center, Japan, Oral presentation, September, 2023

Analysis of interface resistance between silicone sheet with groove structure and sliding water droplet on the sheet

C. Saito, K. Yanagisawa, N. Okumura, W. Iwashita & H. Taura, 2022 JSME-IIP/ASME-ISPS Joint Conference on Micromechatronics for Information and Precision Equipment (MIPE 2022), Nagoya University, Japan, Oral presentation, August, 2022

How do 3D viscoelastic objects begin to slide? – Relation between precursor slip and friction coefficient –

W. Iwashita, H. Matsukawa & M. Otsuki, 7th World Tribology Congress (WTC 2022), Lyon Convention Centre, France, Oral presentation, July, 2022

Breakdown of Amontons’ law due to precursor slip in 3D viscoelastic object

W. Iwashita, H. Matsukawa & M. Otsuki, 19th U.S. National Congress on Theoretical and Applied Mechanics (USNC/TAM 2022), The University of Texas at Austin, USA, Oral presentation, June, 2022

How do macroscopic objects begin to slide? – Relation between precursor slip and friction coefficient –

W. Iwashita, H. Matsukawa & M. Otsuki, The 9th International Symposium on Surface Science (ISSS-9), Takamatsu, Japan (Online), Poster presentation, November, 2021

Basic evaluation for sliding behavior of silicone sheet with surface topography using equation of motion

K. Yanagisawa, C. Saito, W. Iwashita & N. Okumura, The 3rd Malaysian International Tribology Conference 2020ne (MITC 2020ne), Langkawi, Malaysia (Online), Oral presentation, July, 2021

Research proposal-based use of supercomputer systems