Frame Analysis and Design Computer Classroom/Laboratory Module for Machine Design

Abstract – Frames and trusses designs are often improperly handled by undergraduate mechanical engineering students as they design, model, and evaluate machine frames. A one-day, computer-based, classroom/laboratory module was created to address this situation. The module was developed for use in a junior-level machine design course. This module provides students with a means for improving understanding and knowledge about designing three-dimensional frames. Alternative modeling representations for obtaining stress and deflection results from static analysis of frames, utilizing idealized beam elements are presented. Limitations of using conventional finite solid elements to model long, thin-walled members are shown through a hands-on case study during class. Additional goals of the module are increased student interest in engineering design and analysis, increased student awareness of mechanical modeling implications, and improved student readiness for engineering practice. This frame modeling and analysis module is an advanced topic in a sequence of solid modeling and finite element modules that span the mechanics curriculum in the mechanical engineering specialty at Mercer University. Instructional materials developed for the laboratory session and related homework are provided and discussed. Multiple computer-generated solutions are compared with simplified, closed-form solutions to provide bounding cases for verification of results. While materials for this module were developed for specific software, the concepts and topical problem presented for investigation may be used with other design and analysis software. The materials may also be used as a self-paced tutorial