题目：Motion from Energy Release of Elastic Structures Subject to Movable and Configurational Constraints

时间：2019年3月22日 10:00-11:00

地点：80足球直播吧 F310会议室

邀请人：王东 副教授（机器人研究所）

Biography

Francesco Dal Corso is Assistant Professor of Solid and Structural Mechanics at
Department of Civil, Environmental and Mechanical Engineering of the University of Trento, Italy. His research activity is devoted to the Mechanical behaviour of Solid and Structures. In particular, he dealt with problems related the localization of deformation, plasticity, large deformations, homogenization, higher-order continua, stress concentrations and singularities, contact mechanics, configurational mechanics and stability.

Abstract

A summary of recent results obtained within the framework of structures subject to movable and configurational constraints is presented.

(1) A soft robot arm, loaded at one end with a hanging load, has the other end constrained by a slowly rotating clamp. Depending on the load amount, the behaviour of this system switches from an 'elastica compass' to an 'elastica catapult';

(2) A strip with controlled ends. Universal surfaces collecting the critical boundary conditions for which the structure display snap-back instability are disclosed;

(3) A rod subject to transversal forces (twist or bending) and frictionless constraints generates a longitudinal propulsive force realizing (torsional or flexural) locomotion. This motion occurs by transforming elastic energy in kinetic energy.

The presented structural systems are modelled as nonlinear elastic structures and solved analytically. Physical models have been designed, realized and tested, confirming the theoretical predictions. The results represent innovative concepts ready to be used in advanced applications, as for example in soft-robotics and locomotion.