Analysis of intralaminar cracking in 90-plies of GF/EP laminates with distributed ply strength
2021 (English)In: Journal of composite materials, ISSN 0021-9983, E-ISSN 1530-793X, Vol. 55, no 26, p. 3925-3942Article in journal (Refereed) Published
Abstract [en]
Intralaminar cracking in relatively thick 90-plies of [(Formula presented.)]s laminates is analyzed using experimental data for two Glass fiber/Epoxy (GF/EP) material systems. Weibull parameters for transverse failure stress of the 90-ply are obtained from experimental intralaminar crack density versus applied strain data, showing that a reliable analysis requires sufficient amount of data in so called noninteractive crack density region. Monte Carlo simulations of cracking were performed using stress distribution between two cracks calculated using two models: Hashin’s model and a novel model that ensures that the average stress is exactly the same as in FEM solution. Due to its features, the Hashin’s model predicts too low intralaminar crack density (it predicts too strong interaction between cracks). The results emphasize the importance of having a proper stress distribution model when performing Monte Carlo simulations. Simulations were used not only to simulate intralaminar cracking in high and very low crack density regions but also for improving the procedure of Weibull parameter determination.
Place, publisher, year, edition, pages
SAGE Publications Ltd , 2021. Vol. 55, no 26, p. 3925-3942
Keywords [en]
initiation strength, intralaminar cracking, Monte Carlo simulations, Transverse cracks, Weibull distribution, Stress concentration, Average stress, Intralaminar crackings, Intralaminar cracks, Material systems, Stress distribution models, Strong interaction, Transverse failure, Weibull parameters, Monte Carlo methods
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:ri:diva-55490DOI: 10.1177/00219983211027346Scopus ID: 2-s2.0-85109421846OAI: oai:DiVA.org:ri-55490DiVA, id: diva2:1582886
Note
Funding details: 2019-02777; Funding details: VINNOVA; Funding text 1: This work has been performed within the Swedish Aeronautical Research Program (NFFP7), Project 2019-02777.; Funding text 2: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work is jointly funded VINNOVA (Sweden's innovation agency) and GKN Aerospace Engines Sweden.
2021-08-042021-08-042024-10-28Bibliographically approved