Finite element numerical simulation of stitched composite T-joint under tensile load

WEN Liwei; YU Kun; HUAN Huasong

doi:10.7527/S1000-6893.2020.24231

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2021 , Vol. 42 >Issue 2: 224231 - 224231

DOI: https://doi.org/10.7527/S1000-6893.2020.24231

Solid Mechanics and Vehicle Conceptual Design

Finite element numerical simulation of stitched composite T-joint under tensile load

WEN Liwei ,
YU Kun ,
HUAN Huasong

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College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received date: 2020-05-15

Revised date: 2020-06-16

Online published: 2020-08-31

Supported by

Defense Industrial Technology Development Program (JCKY2019204A001);Shanghai Aerospace Science and Technology Innovation Foundation(SAST2019-117)

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Abstract

Software ABAQUS is used to model and analyze the stitched T-joint under tensile load. The cohesive contact method based on the Cohesive Zone Model (CZM) is adopted to simulate the debonding behavior of the stiffener flange and skin. The reinforcement effect of stitching at the interface is simulated with the nonlinear spring element based on mesomechanics. On the basis of finite element model, the influence of stitching on tensile properties of the T-joint is studied by parametric analysis. Results show that the ultimate failure load increases with the increase of the thread diameter. That is, the tensile bearing capacity improves. The analysis results of the finite element method are in good agreement with the experimental values. It is worth noting that there is a 10.4% deviation between the simulation results and the experimental values when the thread diameter increases to 1 500 denier, because the model does not consider the effect of stitching on the in-plane performance and ignores the possible damage caused by stitching. Since the failure modes of the T-joint under tensile load are mainly Type I and Type Ⅱ failures, it is advisable to use two-dimensional finite element model for parametric analysis for its high calculation efficiency and good agreement with the test results.

Key words： finite element; stitching; composites; T-joint; tensile load

Cite this article

WEN Liwei , YU Kun , HUAN Huasong . Finite element numerical simulation of stitched composite T-joint under tensile load[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021 , 42(2) : 224231 -224231 . DOI: 10.7527/S1000-6893.2020.24231

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