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Experimental investigation of effect of printing parameters on impact strength of the bio-inspired 3D printed specimen

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Abstract

Additive Manufacturing (AM) has the ability to fabricate complex structures with bio-mimicry features. Fused Deposition Modeling (FDM), which is AM technique, has the capability of creating complex geometry parts in a short time. The mechanical properties of FDM build parts can be improved by selecting the proper printing parameters. In the present study, the effect of printing parameters viz. printing orientation (flat and on-edge) and infill density (20%, 35%, 50%, 65%, 80% and 100%) on the impact strength of bio-inspired 3D printed specimen has been studied. The specimens with multi-infill pattern were inspired by bio-inspired structure like a turtle shell. The multi-infill pattern specimen includes triangular, honeycomb and grid infill patterns. Based on this multi-infill pattern, impact specimens were fabricated and tested. Impact strength and impact strength/weight ratio of specimens in flat and on-edge orientation are measured and evaluated. The result shows that the impact strength and impact strength/weight ratio of multi-infill pattern specimens printed in flat orientation is less compared to specimens printed in on-edge orientation. The multi-infill pattern specimen with 20% infill density printed in on-edge orientation has the highest impact strength and impact strength/weight ratio as compared to other specimens. Further, high magnification fracture surface analysis is performed to aid in the characterisation of specimen failures.

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Abbreviations

AM:

Additive Manufacturing

FDM:

Fused Deposition Modeling

PLA:

Poly-lactic Acid

3DP:

Three Dimensional Printing

SLA:

Stereolithography

LOM:

Laminated Object Manufacturing

SLM:

Selective Laser Melting

SLS:

Selective Laser Sintering

CAD:

Computer-Aided Design

ABS:

Acrylonitrile Butadiene Styrene

ASTM:

American Society for Testing and Materials

HIPS:

High Impact Polystyrene

PET-G:

Polyethylene Terephthalate Glycol

SEM:

Scanning Electron Microscopy

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Authors and Affiliations

  1. Department of Mechanical Engineering, DIAT (DU), Ministry of Defence, Pune, Maharashtra, 411 025, India

    Mahesh Naik & Dineshsingh G Thakur

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  1. Mahesh Naik
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  2. Dineshsingh G Thakur
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Correspondence to Dineshsingh G Thakur.

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Naik, M., Thakur, D.G. Experimental investigation of effect of printing parameters on impact strength of the bio-inspired 3D printed specimen. Sādhanā 46, 151 (2021). https://doi.org/10.1007/s12046-021-01671-8

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  • DOI: https://doi.org/10.1007/s12046-021-01671-8

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