This paper presents the development and preliminary implementation of a multi-scale material and mechanics education module to improve undergraduate solid mechanics education. We experimentally characterize 3D printed and conventional wrought aluminum samples and collect structural images and perform testing at the micro- and macro- scales. At the micro-scale, we focus on the visualization of material’s grain structures. At the macro-scale, standard material characterization following ASTM standards is conducted to obtain the macroscopic behavior. Digital image correlation technology is employed to obtain the two-dimensional strain field during the macro-scale testing. An evaluation of student learning of solid mechanics and materials behavior concepts is carried out to establish as baseline before further interventions are introduced. The established multi-scale mechanics and materials testing dataset will be also used in a broad range of undergraduate courses, such as Solid Mechanics, Design of Mechanical Components, and Manufacturing Processes, to inform curricular improvement. The successful implementation of this multi-scale approach for education is likely to enhance students’ understanding of abstract solid mechanics theories and establish links between mechanics and materials concepts. More broadly, this approach will assist advanced solid mechanics education in undergraduate engineering education throughout the country.
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Development of a Multiscale Experimentation and Visualization Module for Undergraduate Mechanics Education
Classical mechanics courses are taught to most engineering disciplinary undergraduate students. Due to the recent advancements of multiscale analysis and practice, necessary reforms need to be investigated and explored for classical mechanics courses to address the materials’ mechanics behaviors across multiple length scales. This enhanced understanding is needed for engineering students to consider materials more broadly. This paper presents a recent effort for the development of a multiscale materials and mechanics experimentation (M3E) module that can be potentially implemented in undergraduate mechanics courses, including Statics, Dynamics, Strength of Materials, and Design of Mechanical (Machine) Components. The developed education module introduces the concepts of multiscale materials behavior and microstructures in the form of micro and macro-scales. At the micro-scale, both 3D printed aluminum and cold-rolled aluminum samples were characterized using scanning electron microscope. Microstructures, including grains, grain boundaries, dislocation, precipitates, and micro-voids, were demonstrated to students. At the macro-scale, experiments following ASTM standards were conducted and full strain fields carried by all the samples were analyzed using digital image correlation method. The experimental data were organized and presented to the students in the developed M3E module. The implementation of the developed module in undergraduate mechanics classes allows students to not only visualize materials behavior under various load conditions, but also understand the reasons behind classical mechanics properties. To assess the effectiveness of the developed M3E education module, an evaluation question was developed. Students are required to classify key mechanics, materials, and processing concepts at both micro and macroscales. More than 40 fundamental concepts and keywords are included in the tests. The study outcomes and effectiveness of the M3E education module will be reported in this paper.
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- Award ID(s):
- 1712178
- NSF-PAR ID:
- 10206106
- Date Published:
- Journal Name:
- 2020 ASEE Virtual Annual Conference
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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This paper presents the development and preliminary implementation of a multi-scale material and mechanics education module to improve undergraduate solid mechanics education. We experimentally characterize 3D printed and conventional wrought aluminum samples and collect structural images and perform testing at the micro- and macro- scales. At the micro-scale, we focus on the visualization of material’s grain structures. At the macro-scale, standard material characterization following ASTM standards is conducted to obtain the macroscopic behavior. Digital image correlation technology is employed to obtain the two-dimensional strain field during the macro-scale testing. An evaluation of student learning of solid mechanics and materials behavior concepts is carried out to establish as baseline before further interventions are introduced. The established multi-scale mechanics and materials testing dataset will be also used in a broad range of undergraduate courses, such as Solid Mechanics, Design of Mechanical Components, and Manufacturing Processes, to inform curricular improvement. The successful implementation of this multi-scale approach for education is likely to enhance students’ understanding of abstract solid mechanics theories and establish links between mechanics and materials concepts. More broadly, this approach will assist advanced solid mechanics education in undergraduate engineering education throughout the country.more » « less
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- Free Publicly Accessible Full Text
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Accepted Manuscript1.0
- Conference Paper:
- https://doi.org/10.18260/1-2--34450
