Evaluation and consideration of local specimen material properties in lifetime prediction of short fiber-reinforced PA6T/6I

Research output: Contribution to journalArticleResearchpeer-review

External Organisational units

  • Polymer Competence Center Leoben GmbH

Abstract

To exploit the full material potential of short fiber-reinforced PA6T/6I, specific component calculations including anisotropic material behavior is necessary. For this, different failure criteria and fatigue models are used to describe the behavior during a component service life. This paper deals with the determination and consideration of fiber orientations (FOs) for failure criteria and fatigue calculations. Therefore, a novel method to determine FO distributions across injection-molded plates is proposed. The developed method allows a forecast of FOs for different specimen extraction positions and angles on injection-molded plates by using only a few measured reference points. As a result, fatigue models can be calibrated with the strength values and the corresponding FO, calculated for fracture position. The performed tests show a non-negligible influence of failure positions, due to FO distributions along the specimens. So, the FO determination method delivers an improvement in strength values estimation.

Details

Original languageEnglish
Article number13634
Pages (from-to)980-990
Number of pages11
JournalFatigue and Fracture of Engineering Materials and Structures
Volume45.2022
Issue number4
DOIs
Publication statusPublished - 1 Feb 2022