Abstract
In this work, we study the mechanical properties under compression of composite materials with reinforced-rigid-matrix produced by additive manufacturing. The study considers different fiber orientations and number of reinforcement layers of the specimens. The experimental investigation was carried out for parts produced with a nylon matrix and fiberglass reinforcement. The composite material was manufactured through fused deposition modeling (FDM) in a Markforged Mark Two 3D printer, which allows the production of specimens satisfying the ASTM D3410 standards. Different filling patterns were analyzed (triangular, hexagonal and rectangular), as well as, the reinforcing fiber angles (0°, ±30°, and ±45°), and the number of reinforcement layers (6, 12 and 18). The different configurations are analyzed in order to establish their performance under compression. Results indicate that to obtain a highly resistant material, more layers should be added and the fibers oriented parallel to the load axis.
Highlights
Composite materials reinforced by fibers have applications in many fields thanks to their high forceweight, rigidity-weight ratios [1,2,3], and offer a much greater resistance to weight than monolithic structural materials
We investigate the mechanical properties for compression loading conditions of reinforced composite materials produced by additive manufacturing
The number and orientation of fibers of the reinforcing material have a strong effect on the maximum compression stress and the elastic modulus
Summary
Composite materials reinforced by fibers have applications in many fields thanks to their high forceweight, rigidity-weight ratios [1,2,3], and offer a much greater resistance to weight than monolithic structural materials. Significant research has been performed for the tensile strength, fatigue resistance, and the hardness in composites, but the compressive stress in these materials has shown little improvement [5]. Given their high elastic modulus, it was found that the dominant failure mode was by shear in the fibers on a macroscopic scale [8]. [5] the authors performed electronic fractography and noticed different types of fractures in the specimens due to failure by shear In Ref. [5] the authors performed electronic fractography and noticed different types of fractures in the specimens due to failure by shear
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