The effects of loading angles on the failure of cross-ply notched bio-basalt composites

Bergant, Zoran (author), Šturm, Roman (author), Kek, Tomaž (author), Halilovič, Miroslav (author), Maček, Andraž (author)

A cross-ply basalt V-notched butterfly specimens were subjected to pure tension, combined tension-shear, and shear stress-strain state using a modified Arcan test fixture with loading angles from 0° to 90° with 15° increment. Multiaxial stress and strain states were studied using the principal stress and strain ratio, from which the principal angle was determined and used to represent principal states in the gauge section. The quasi-elastic to non-linear transition stresses were determined for each loading angle. In biaxial stress-strain states and pure shear, the deformation and consequently the shear-induced damage start to accumulate significantly. Also, in biaxial stress-strain states between 15°-75°, the shift from tension-shear to pure shear was observed after the transition to the non-linear part of the stress-strain curve. The digital image correlation (DIC) images and microscopic evaluation show that a large extent of damage is the consequence of the shear deformation after the rotation of 0° clamped fibres, while the 90° fibres maintained their original straight form. In off-axis tests, the principal strain axis rotates towards the weakest material axis even at small off-axis angles. This causes a transition from a tension-shear biaxial state in the linear loading part to shear in the non-linear part, leading to irreversible damage beyond the transition point.

• Language: English
• Keywords: Arcan fixture, basalt fibre composites, digital image correlation, finite element analysis
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: 13 str.
• Numbering: Vol. 140, art. 108609
• PID: 20.500.12556/RUL-163958
• UDC: 620.1
• ISSN on article: 0142-9418
• DOI: 10.1016/j.polymertesting.2024.108609
• COBISS.SI-ID: 211505923
• Publication date in RUL: 15.10.2024

Record is a part of a journal

• Title: Polymer testing
• Shortened title: Polym. test.
• Publisher: Applied Science Publishers Ltd
• ISSN: 0142-9418
• COBISS.SI-ID: 26155008

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: Arcan čeljusti, bazaltni kompoziti, digitalna korelacija slik, metode končnih elementov

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P2-0270
• Name: Proizvodni sistemi, laserske tehnologije in spajanje materialov

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P2-0263
• Name: Mehanika v tehniki