This is a simple assignment that your students can do at home, either as part of a remote course or an in-person course. Students make short (<5 minute) videos demonstrating an ASTM standard mechanical test (or other common mechanical test) using basic household materials. Learning Objectives Read and interpret ASTM standard specifications for mechanical tests. […]
The Spring 2020 semester at Cornell University was thrown into chaos by COVID-19. But we had a little more time to prepare for Summer 2020. In this video, I describe how we adapted our mechanics of materials lab activities for remote instruction.
This video provides an overview of two GeoGebra https://www.geogebra.org/ interactives which can be used for teaching and learning Engineering Mechanics: Statics. The links to the interactives include:– 2D Moment Arms: https://www.geogebra.org/m/xnakpuqq– 3D Vector Dot Product: https://www.geogebra.org/m/n5hjvunp– Full List of my GeoGebra interactives: https://www.geogebra.org/u/drdan
Model Description This is a simple demonstration of the basic principals underlying the behavior of thin-walled pressure vessels (TWPVs). A hot dog is used to show that hoop stresses are twice as high as longitudinal stresses in cylindrical pressure vessels and failure occurs along the length of the hot dog. The failure that occurs in […]
Model Description Students often have difficulty with shear and stress/strain transformation. To give a quick demonstration of pure shear and stress transformation, blocks are drawn on the side of a BIG book to show the effects of shear and transformation of axes. This demonstration should take 3-5 minutes. Engineering Principle Shear occurs when parallel planes […]
Model Description This is a simple demonstration of the basic principles and behavior underlying stress concentrations. Stresses at points of load application can be much larger than the average stress in a member. The same is true when a member contains a discontinuity. Paper members with the same mid-span width are used to demonstrate the […]
Model Description This simple demonstration depicts how moments (and forces) result in bending of a beam and how the deformation is related to the assumptions associated with elastic beam behavior. A foam beam with vertical lines (black lines) and a horizontal line drawn along the neutral axis (red line) for a rectangular beam is used […]
Model Description This is a simple demonstration of the basic principles underlying the elastic and plastic behavior of materials subjected to an axial load. The demonstration can also be used to show the highlight the elastic and plastic portions of stress-strain curves. This demonstration should take 8-10 minutes. Engineering Principle The basic definitions for stress, […]
Model Description This is a simple demonstration to introduce the basic principles of experimentation, analysis, and design in reference to axially loaded members. Copper wire is used to lift an object of known weight. In order to determine the minimum number of copper wire strands required to lift the load, students perform experiments, analysis, and […]
Model Description This is a simple demonstration of the basic principles underlying the behavior of materials subjected to an axial load. The demonstration can also be used to show the usefulness of stress-strain curves versus load-deformation curves. This demonstration should take 10 minutes. Engineering Principle The basic definitions for deformation and strain: where the axial […]