Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 09, 2017 - November 11, 2017
In many sports, collision with a ball or other player causes injury in a player. Therefore, protectors with hard outer shell have been widely used. Generally, hard protector has a layered structure, consisted by hard outer shell and soft inner shell. When a protector is subjected to a collision, the outer shell compresses the inner shell uniformly without local deformation, preventing excessive impact force to human body. In this study, a flexible protector having an outer shell hardening only under impact due to time dependency of elastic modulus of epoxy resin. To control the time dependency, a crosslinking density of resin was changed. Prototype flexible protectors were designed based on the time dependency of elastic modulus, and flexibility and impact absorption characteristic of the protector were evaluated.
The Proceedings of Joint Symposium: Symposium on Sports Engineering, Symposium on Human Dynamics
