On anisotropy, strain rate and size effects in vat photopolymerization based specimens

Dayakar L. Naik; Ravi Kiran

doi:10.1016/j.addma.2018.08.021

On anisotropy, strain rate and size effects in vat photopolymerization based specimens

Dayakar L. Naik, Ravi Kiran

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

The influence of build orientation, layer thickness, strain rate and size effect on the Young's modulus, ultimate tensile strength and fracture strains in vat photopolymerization based additively manufactured specimens is investigated. Mechanical testing and subsequent scanning electron microscopy tests on additively manufactured specimens are conducted. Anisotropy in mechanical behavior is only observed in specimens fabricated in different planes. An increase in layer thickness and decrease in strain rate resulted in lower strength, stiffness and higher fracture strains. No significant size effect on strength and failure strains is observed. Cure kinetics is found to have significant influence on mechanical properties of additively manufactured specimens.

Original language	English (US)
Pages (from-to)	181-196
Number of pages	16
Journal	Additive Manufacturing
Volume	23
DOIs	https://doi.org/10.1016/j.addma.2018.08.021
State	Published - Oct 1 2018
Externally published	Yes

Keywords

Anisotropy
Cure
Fractography
Mechanical properties
Vat photopolymerization

ASJC Scopus subject areas

Biomedical Engineering
General Materials Science
Engineering (miscellaneous)
Industrial and Manufacturing Engineering

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10.1016/j.addma.2018.08.021

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title = "On anisotropy, strain rate and size effects in vat photopolymerization based specimens",

abstract = "The influence of build orientation, layer thickness, strain rate and size effect on the Young's modulus, ultimate tensile strength and fracture strains in vat photopolymerization based additively manufactured specimens is investigated. Mechanical testing and subsequent scanning electron microscopy tests on additively manufactured specimens are conducted. Anisotropy in mechanical behavior is only observed in specimens fabricated in different planes. An increase in layer thickness and decrease in strain rate resulted in lower strength, stiffness and higher fracture strains. No significant size effect on strength and failure strains is observed. Cure kinetics is found to have significant influence on mechanical properties of additively manufactured specimens.",

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AU - Naik, Dayakar L.

AU - Kiran, Ravi

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N2 - The influence of build orientation, layer thickness, strain rate and size effect on the Young's modulus, ultimate tensile strength and fracture strains in vat photopolymerization based additively manufactured specimens is investigated. Mechanical testing and subsequent scanning electron microscopy tests on additively manufactured specimens are conducted. Anisotropy in mechanical behavior is only observed in specimens fabricated in different planes. An increase in layer thickness and decrease in strain rate resulted in lower strength, stiffness and higher fracture strains. No significant size effect on strength and failure strains is observed. Cure kinetics is found to have significant influence on mechanical properties of additively manufactured specimens.

AB - The influence of build orientation, layer thickness, strain rate and size effect on the Young's modulus, ultimate tensile strength and fracture strains in vat photopolymerization based additively manufactured specimens is investigated. Mechanical testing and subsequent scanning electron microscopy tests on additively manufactured specimens are conducted. Anisotropy in mechanical behavior is only observed in specimens fabricated in different planes. An increase in layer thickness and decrease in strain rate resulted in lower strength, stiffness and higher fracture strains. No significant size effect on strength and failure strains is observed. Cure kinetics is found to have significant influence on mechanical properties of additively manufactured specimens.

KW - Anisotropy

KW - Cure

KW - Fractography

KW - Mechanical properties

KW - Vat photopolymerization

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JO - Additive Manufacturing

JF - Additive Manufacturing

ER -

On anisotropy, strain rate and size effects in vat photopolymerization based specimens

Abstract

Keywords

ASJC Scopus subject areas

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