Keywords

Yield Strength, Elastic Modulus, FDM, process monitoring, additive manufacturing, 3D printing

Abstract

Purpose: 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 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 DIY users. While it is tested with FDM, it should be applicable to other AM processes.

Original Publication Citation

A. Katz, J. Nussbaum, C. P. Lusk, and N. B. Crane, “Stress-Limiting Test Structures for Rapid Low-Cost Strength and Stiffness Assessment,” Rapid Prototyping Journal, Vol 21 (2015) pp 144-151 (DOI: 10.1108/RPJ-12-2014-0170).

Document Type

Peer-Reviewed Article

Publication Date

2015

Publisher

Rapid Prototyping Journal

Language

English

College

Ira A. Fulton College of Engineering and Technology

Department

Mechanical Engineering

University Standing at Time of Publication

Full Professor

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