Document Type

Article

Publication Date

2024

DOI

10.3390/ma17143389

Publication Title

Materials

Volume

17

Issue

14

Pages

3389 (1-13)

Abstract

An experimental investigation of interlaminar toughness for post-cured through-thickness reinforcement (PTTR) skin-stringer sub-element is presented. The improvement in the crack resistance capability of skin-stringer samples was shown through experimental testing and finite element analysis (FEA) modeling. The performance of PTTR was evaluated on a pristine and initial-disbond of the skin-stringer specimen. A macro-scale pin-spring modeling approach was employed in FEA using a non-linear spring to capture the pin failure under the mixed-mode load. The experimental results showed a 15.5% and 20.9% increase in strength for the pristine-PTTR and initial-disbond PTTR specimens, respectively. The modeling approach accurately represents the overall structural response of PTTR laminate, including stiffness, adhesive strength, crack extension scenarios and progressive pin failure modes. This modeling approach can be beneficial for designing damage-tolerant structures by exploring various PTTR arrangements for achieving improved structural responses.

Rights

© 2024 by the authors.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) License.

Data Availability

Article states: "The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author."

Original Publication Citation

Bhagatji, J. D., Morris, C., Sridhar, Y., Bhattacharjee, B., Kaipa, K. N., & Kravchenko, O. G. (2024). Effect of post-cured through thickness reinforcement on disbonding behavior in skin-stringer configuration. Materials, 17(14), 1-13, Article 3389. https://doi.org/10.3390/ma17143389

ORCID

0000-0001-7228-811X (Bhagatji), 0000-0002-8095-938X (Kaipa), 0000-0002-8573-7540 (Kravchenko)

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