Stress-Limiting Test Structures for Rapid Low-Cost Strength and Stiffness Assessment
Document Type
Article
Publication Date
2015
Keywords
additive manufacturing, elastic modulus, FDM, process monitoring, rapid prototyping, yield strength
Digital Object Identifier (DOI)
https://doi.org/10.1108/RPJ-12-2014-0170
Abstract
Purpose - The purpose of this paper is to evaluate the use of a simple printed geometry to estimate mechanical properties (elastic modulus, yield strength) with inexpensive test equipment. Design/methodology/approach - Test geometry is presented that enables controlled strains with manual deformation and repeatable measurement of vibrational frequencies. This is tested with multiple fused deposition modeling (FDM) machines to assess measurement accuracy and repeatability. Printing orientation and some printing parameters are varied to assess the measurement sensitivity. Findings - The test methods show good correlation with manufacturer material specifications in the X-Y plane and reported elastic strain limits. It is also sensitive to printing orientation and printing parameters. Research limitations/implications - Further work is needed to assess the sensitivity of the method to particular defects and parameter errors expected in particular applications. Originality/value - This method supports process monitoring in production environments and inexpensive assessments of material properties for hobbyist and do-i- yourself users. While it is tested with FDM, it should be applicable to other additive manufacturing processes.
Was this content written or created while at USF?
Yes
Citation / Publisher Attribution
Rapid Prototyping Journal, v. 21, issue 2, p. 144-151
Scholar Commons Citation
Katz, Andrew; Nussbaum, Justin; Lusk, Craig P.; and Crane, Nathan B., "Stress-Limiting Test Structures for Rapid Low-Cost Strength and Stiffness Assessment" (2015). Mechanical Engineering Faculty Publications. 12.
https://digitalcommons.usf.edu/egr_facpub/12
