Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/88568
Title: Tensile failure prediction for cellular lattice structure fabricated by material extrusion using cohesive zone model
Authors: Park, Sang-In
Watanabe, Narumi
Rosen, David W.
Keywords: Cellular Lattice Structure
Material Extrusion
DRNTU::Engineering::Mechanical engineering::Prototyping
Issue Date: 2018
Source: Park, S.- I., Watanabe, N., & Rosen, D. W. (2018). Tensile failure prediction for cellular lattice structure fabricated by material extrusion using cohesive zone model. Proceedings of the 3rd International Conference on Progress in Additive Manufacturing (Pro-AM 2018), 358-363. doi:10.25341/D47G62
Abstract: In material extrusion, the geometrical approximation process introduces defects such as voids and gaps in the build plane as well as along the building direction. These serve as crack initiation sites and increase possibility of fracture by crack propagation. As a result, structural members under tensile loading in lattice structures tend to fail at significantly lower stresses than strengths that are estimated only based on elastic or plastic failure criteria. In this paper, we present a failure prediction approach for material extruded cellular lattice structures under tensile loading. The approach is based on a cohesive zone model (CZM) and assesses two failure criteria: elastic failure and fracture. We constructed as-fabricated voxel models for lattice structures and inserted cohesive zone element at interfaces between layers. The failure strength was estimated using the voxel models and are compared with test results.
URI: https://hdl.handle.net/10356/88568
http://hdl.handle.net/10220/45861
DOI: 10.25341/D47G62
Rights: © 2018 Nanyang Technological University. Published by Nanyang Technological University, Singapore.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:Pro-AM Conference Papers

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