Microstructural analysis of the transverse and shear behavior of additively manufactured CFRP composite RVEs based on the phase-field fracture theory

Gljušćić, Matej (author), Lanc, Domagoj (author), Franulović, Marina (author), Žerovnik, Andrej (author)

Due to the versatility of its implementation, additive manufacturing has become the enabling technology in the research and development of innovative engineering components. However, many experimental studies have shown inconsistent results and have highlighted multiple defects in the materials’ structure thus bringing the adoption of the additive manufacturing method in practical engineering applications into question, yet limited work has been carried out in the material modelling of such cases. In order to account for the effects of the accumulated defects, a micromechanical analysis based on the representative volume element has been considered, and phase-field modelling has been adopted to model the effects of inter-fiber cracking. The 3D models of representative volume elements were developed in the Abaqus environment based on the fiber dimensions and content acquired using machine learning algorithms, while fulfilling both geometric and material periodicity. Furthermore, the periodic boundary conditions were assumed for each of the representative volume elements in transversal and in-plane shear test cases,. The analysis was conducted by adopting an open-source UMAT subroutine, where the phase-field balance equation was related to the readily available heat transfer equation from Abaqus, avoiding the necessity for a dedicated user-defined element thus enabling the adoption of the standard elements and features available in the Abaqus CAE environment. The model was tested on three representative volume element sizes and the interface properties were calibrated according to the experimentally acquired results for continuous carbon-fiber-reinforced composites subjected to transverse tensile and shear loads. This investigation confirmed the consistency between the experimental results and the numerical solutions acquired using a phase-field fracture approach for the transverse tensile and shear behavior of additively manufactured continuous-fiber-reinforced composites, while showing dependence on the representative volume element type for distinctive load cases.

• Language: English
• Keywords: additive manufacturing, fiber reinforced composites, material behavior modelling, micromechanics
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: 20 str.
• Numbering: Vol. 7, iss. 1, art. 38
• PID: 20.500.12556/RUL-144107
• UDC: 539.4:620.178.32
• ISSN on article: 2504-477X
• DOI: 10.3390/jcs7010038
• COBISS.SI-ID: 140229891
• Publication date in RUL: 01.02.2023

Record is a part of a journal

• Title: Journal of composites science
• Shortened title: J. compos. sci.
• Publisher: MDPI
• ISSN: 2504-477X
• COBISS.SI-ID: 529755673

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: aditivna proizvodnja, vlaknasti kompoziti, materialni modeli, mikromehanika