As an interpretation of existing jamming effects, the main variables affecting the increase in stiffness due to jamming are known as system density, jamming density, pressure, and particulate temperature. The main variable, jamming density, is closely related to the distribution of particle size and contact properties such as particle shape and friction. However, the complexity of these variables makes it difficult to fully understand the mechanism of the jamming effect. In this paper, we focus on the jamming effects of particles that have more elastic properties than particles such as sand and coffee powder, which are commonly used as constituent particles of existing jamming, in order to reduce complicated factors such as temperature and concentrate on jamming effects based on elastic characteristics of particles. It was experimentally explored the possibility of increasing stiffness by mixing particles of different sizes rather than simply increasing the bending stiffness by controlling the particle size. Through simulations and experiments, we found a case where the stiffness of each particle size distribution is larger than the stiffness of each particle size.

• 송은정(Mechanical Engineering, Sungkyunkwan University) | Eun-Jeong Song
• 이영민(Mechanical Engineering, Sungkyunkwan University) | Young-Min Lee
• 문형필(Mechanical Engineering, Sungkyunkhan University) | Hyungpil Moon
• 최혁렬(Mechanical Engineering, Sungkyunkhan University) | Hyouk Ryeol Choi
• 구자춘(Mechanical Engineering, Sungkyunkhan University) | Ja Choon Koo Corresponding author