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Strength prediction of composite Pi joints under tensile load

Strength prediction of composite Pi joints under tensile load
Strength prediction of composite Pi joints under tensile load
Application of an all-composite ? joint as a structural connector for integrated aircraft structures can potentially enable both weight and assembly cost benefits while retaining good load carrying capability. This article is concerned with the behavior of an all-composite ? joint under a static, tensile load. The damage onset, propagation, and ultimate collapse of the composite ? joint are simulated by a progressive damage method. A progressive damage model, which includes three aspects: a three dimensional finite element model of composite ? joint for stress analysis, a modified maximum stress failure criterion to assess damage/failure, and a material degradation model to simulate the structural stiffness reduction, is presented to predict strength of composite ? joint. Stress distributions are characterized and the load transfer path in the joint is traced. Failure mechanisms are identified and failure progression between the first and final failures is outlined for the composite ? joint. Experimental results show good agreement with the predictions from the numerical models.

adhesive joints, carbon fibers, mechanical properties, strength, finite element analysis
0021-9983
2759-2778
Zhao, Libin
8b521266-8ddc-4c17-ac64-6fc1a294175d
Qin, Tianliang
f1512a97-0eca-41c9-9a33-b9fbd627c99b
Shenoi, R.Ajit
a37b4e0a-06f1-425f-966d-71e6fa299960
Zhang, Jianyu
45d45baa-c6ae-4feb-8377-3f8039d76b51
Liang, Xianzhu
b27b46bc-13bb-4520-9a67-add3203d0d48
Huang, Hai
f29a0528-deeb-492d-969b-d085de8d5ec6
Zhao, Libin
8b521266-8ddc-4c17-ac64-6fc1a294175d
Qin, Tianliang
f1512a97-0eca-41c9-9a33-b9fbd627c99b
Shenoi, R.Ajit
a37b4e0a-06f1-425f-966d-71e6fa299960
Zhang, Jianyu
45d45baa-c6ae-4feb-8377-3f8039d76b51
Liang, Xianzhu
b27b46bc-13bb-4520-9a67-add3203d0d48
Huang, Hai
f29a0528-deeb-492d-969b-d085de8d5ec6

Zhao, Libin, Qin, Tianliang, Shenoi, R.Ajit, Zhang, Jianyu, Liang, Xianzhu and Huang, Hai (2010) Strength prediction of composite Pi joints under tensile load. Journal of Composite Materials, 44 (23), 2759-2778. (doi:10.1177/0021998310369593).

Record type: Article

Abstract

Application of an all-composite ? joint as a structural connector for integrated aircraft structures can potentially enable both weight and assembly cost benefits while retaining good load carrying capability. This article is concerned with the behavior of an all-composite ? joint under a static, tensile load. The damage onset, propagation, and ultimate collapse of the composite ? joint are simulated by a progressive damage method. A progressive damage model, which includes three aspects: a three dimensional finite element model of composite ? joint for stress analysis, a modified maximum stress failure criterion to assess damage/failure, and a material degradation model to simulate the structural stiffness reduction, is presented to predict strength of composite ? joint. Stress distributions are characterized and the load transfer path in the joint is traced. Failure mechanisms are identified and failure progression between the first and final failures is outlined for the composite ? joint. Experimental results show good agreement with the predictions from the numerical models.

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More information

Published date: November 2010
Keywords: adhesive joints, carbon fibers, mechanical properties, strength, finite element analysis
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 173053
URI: http://eprints.soton.ac.uk/id/eprint/173053
ISSN: 0021-9983
PURE UUID: 26d34889-894c-40cc-8689-a31a6a921472

Catalogue record

Date deposited: 02 Feb 2011 10:04
Last modified: 26 Apr 2022 17:57

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Contributors

Author: Libin Zhao
Author: Tianliang Qin
Author: R.Ajit Shenoi
Author: Jianyu Zhang
Author: Xianzhu Liang
Author: Hai Huang

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