About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
NEW TIME (was 10:10 am) Effect of Z-Pin Geometric Parameters on Mechanical Properties of Z-Pinned Additively Manufacturing Composites |
Author(s) |
Aslan Nasirov, Deepak Kumar Pokkalla, Seokpum Kim, Tyler Smith, Halil Tekinalp, Soydan Ozcan, Chad Duty, Vlastimil Kunc |
On-Site Speaker (Planned) |
Deepak Kumar Pokkalla |
Abstract Scope |
Additive manufacturing of fiber-reinforced composites using a conventional 3D printing approach results in significant mechanical anisotropy and limited tensile strength in the build direction due to layer-wise deposition. A novel “z-pinning” technique allowing material to be continuously deposited across multiple layers within the part was proposed recently to achieve mechanical isotropy. Preliminary experimental investigations demonstrating “z-pinning” approach revealed that the mechanical properties are highly dependent on the geometrical parameters of z-pins such as size and spacing. In this study, a finite element-based model was developed to predict the mechanical response of printed composites with z-pins and validated with experimental results. The developed numerical model accounts for orientation of fibers, bead-to-bead adhesion, pin-to- pin adhesion, and pin-to-bead mechanical interlocking. The effect of z-pin geometric parameters on modulus, tensile strength, and toughness was investigated to develop design guidelines for additive manufacturing of composites with enhanced mechanical properties in the build direction. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |