scholarly journals Rolling Stability of a Power-Generating Tumbleweed Rover

2014 ◽  
Vol 51 (6) ◽  
pp. 1895-1906 ◽  
Author(s):  
François Robert Hogan ◽  
James Richard Forbes ◽  
Timothy David Barfoot
Keyword(s):  
Tumbleweed Rover ◽  
Rolling Stability

scholarly journals The NASA Langley Mars Tumbleweed Rover Prototype

2006 ◽  
Author(s):  
Jeffrey Antol ◽  
Richard Chattin ◽  
Benjamin Copeland ◽  
Shawn Krizan
Keyword(s):  
Tumbleweed Rover

Design, Analysis and Testing of Mars Tumbleweed Rover Concepts

2008 ◽  
Vol 45 (2) ◽  
pp. 370-382 ◽  
Author(s):  
Jamie L. Wilson ◽  
Andre P. Mazzoleni ◽  
Fred R. DeJarnette ◽  
Jeffrey Antol ◽  
Gregory A. Hajos ◽  
...  
Keyword(s):  
Design Analysis ◽  
Tumbleweed Rover

Producing Hollow Shafts in a New Horizontal Mill by Novel Flat-Knifing Cross-Wedge Rolling With Single Guide

2021 ◽  
Author(s):  
Longfei Lin ◽  
Baoyu Wang ◽  
Jinxia Shen ◽  
Tao Liu
Keyword(s):  
Numerical Simulations ◽  
Experimental Tests ◽  
Radial Force ◽  
Transportation Industry ◽  
Cross Wedge Rolling ◽  
Forming Defect ◽  
Engineering Significance ◽  
Novel Method ◽  
Hollow Shafts ◽  
Rolling Stability

Abstract To meet the requirement of lightweight, there are increasing solid shafts being designed to be hollow in transportation industry. In this study, a novel method of flat-knifing cross-wedge rolling (FCWR) with single guide is proposed including a modified roller, a horizontal mill and a single-guide structure, and its key problems are studied by numerical simulations and experimental tests. A mathematical model of FCWR roller is established, which reveals the wedge length of rollers is effectively reduced by modifying knifing wedge from normalized roller. Further, a horizontal multifunctional mill is invented and constructed to carry out the FCWR experiment with single guide. According to the results from the numerical simulations and corresponding experiments, it is observed that the typical defects of hole expansion and knifing groove are absolutely avoided because the improved flat-knifing wedge produces a radial force to shrink the inner hole and avoid the deformation concentration of the outer surface during knifing stage. Moreover, the single guide rolling performed in the horizontal mill efficiently improve rolling stability because the workpiece is restricted into a smaller workspace. To the authors’ knowledge, all these integrated improvements of FCWR roller, single guide rolling and horizontal mill are innovative, which are of great engineering significance to manufacture hollow shafts on account of the advantages of avoiding forming defect, reducing roller diameter, improving rolling stability and simplifying mill structure.

scholarly journals Lateral Roll Force in Asymmetrical Rolling and Its Influence on Rolling Stability.

1995 ◽  
Vol 35 (12) ◽  
pp. 1489-1493
Author(s):  
Jiuming Yu ◽  
Defu Gao ◽  
Dake Yu
Keyword(s):  
Roll Force ◽  
Asymmetrical Rolling ◽  
Rolling Stability

scholarly journals Research on chaos and nonlinear rolling stability of a rotary-molded boat

2016 ◽  
Vol 84 (3) ◽  
pp. 1373-1382 ◽  
Author(s):  
Qiguo Yao ◽  
Yuliang Liu
Keyword(s):  
Nonlinear Rolling ◽  
Rolling Stability
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