The impact of a rigid body and rod finite length made viscoplastic incompressible material moving towards each other at constant velocity is studied in the article. One-dimensional motion considered, i.e., velocity, stress, parameters are considered to be averaged over section. According model viscous-plastic material, divided into two parts: region plastic strain that moves as solid after impa...

Michael Long, Rice University; Corey Bergad, Bates College; EERC Name: MCEER Host Institution: SUNY at Buffalo Faculty Advisor: Dr. Andrei Reinhorn ________________________________________________________________________ Abstract: A plastic hinge is a type of energy dampening device allowing plastic rotation of an otherwise rigid column connection. This device is composed of a weakened portion ...

Escherichia coli (E. coli) and other bacteria are propelled through water by several helical flagella, which are rotated by motors embedded at random points on the cell wall. Depending on the handedness and rotation sense, the motion of the flagella induces a flow field that causes them to wrap around each other and form a bundle. Our objective is to understand and model the mechanics of this p...