Design of Fused-Deposition ABS Components for Stiffness and Strength

[+] Author and Article Information
José F. Rodrı́guez

Departamento de Mecánica, Universidad Simón Bolı́var, Caracas, Venezuela

James P. Thomas

Multifunctional Materials Branch, Code 6350, Naval Research Laboratory, Washington, DC 20375

John E. Renaud

Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556

J. Mech. Des 125(3), 545-551 (Sep 04, 2003) (7 pages) doi:10.1115/1.1582499 History: Received August 01, 2000; Revised October 01, 2002; Online September 04, 2003
Copyright © 2003 by ASME
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Grahic Jump Location
Idealized mesostructures for unidirectional laminate FD-ABS materials. The fiber extrusion plane is defined by the 1–2 coordinate axes.
Grahic Jump Location
Orientation of a part relative to the FD machine. The XYZ coordinate system is attached to the machine and the xyz system to the part. The angles α and β locate the extrusion plane normal (i.e., the Z-axis) relative to the part, and θ characterizes the extrusion direction within the layering plane.
Grahic Jump Location
Mechanical performance optimizer tool for Fused-Deposition parts
Grahic Jump Location
Cross-section micrograph of the FD-ABS mesostructure in the aligned configuration. The white “elliptical” areas are ABS fibers and the dark “triangular” areas are voids.
Grahic Jump Location
Stress-strain response for P400 ABS feedstock material for the FD machine and FD-ABS specimens loaded parallel (long) or perpendicular (trans) to the fiber extrusion direction
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Strength versus load-to-fiber angle for unidirectional, FD-ABS specimens
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Two-section cantilevered beam geometry for the FD-ABS optimization problem
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The displacement constraint, g1, (vertical axis) plotted as a function of θ1 and θ2 for F=30 N/cm2. Recall that g1 is the difference between the 9 mm displacement limit and the maximum spatial displacement considering all points on the hangar. The larger the value of g1, the smaller the value of the maximum displacement.
Grahic Jump Location
The FS constraint, g2, (vertical axis) as a function of θ1 and θ2 for F=30 N/cm2. Recall that g2 is the difference between the computed Factor of Safety against yielding and 1.2 for all points on the hangar. The larger the value of g2, the smaller the value of the maximum von-Mises stress.
Grahic Jump Location
Contour plot of the FS constraint, g2, as a function of θ1 and θ2 for F=30 N/cm2. The X represents the optimum points found by the optimization algorithm.
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Optimization iteration-history plot for the maximum allowable force, F, for the starting point {F,θ12}={100,90,90}



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