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Analytical and Numerical Investigation of Multi-fastener Joints in Composite Structures

Massera, Luca and Koord, Josef (2019) Analytical and Numerical Investigation of Multi-fastener Joints in Composite Structures. Master's. DLR-Interner Bericht. DLR-IB-FA-BS-2019-59, 167 S.

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Abstract

In this study, the reaction forces arising in multi-fastener joints subject to different forms of in-plane loading are investigated. Different approaches are considered with the goal of designing a tool capable of predicting fastener loads in the context of early preliminary joint design. A review of the relevant literature on the topic is provided. The analytical models retained from the literature, as well as models modified or proposed as part of the study, are presented and discussed. The models accounting for the deformation of both the connected members and of the fasteners are based on a one-dimensional discretization of the joint through linear springs. The stiffness of the fasteners is calculated with empirically based methods. The applicability of the analytical models to joint design is assessed both in terms of accuracy and conservatism. The limits of validity of the assumptions underlying the analytical models are evaluated through comparison with detailed numerical models. Through 3D Finite Element analysis with linear material deformation, the parts composing the joint and their interactions are modelled. Joint design guidelines stemming from the findings of the numerical and analytical investigations are suggested.

Item URL in elib:https://elib.dlr.de/128454/
Document Type:Monograph (DLR-Interner Bericht, Master's)
Title:Analytical and Numerical Investigation of Multi-fastener Joints in Composite Structures
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Massera, LucaEcole Polytechnique de LausanneUNSPECIFIED
Koord, JosefJosef.Koord (at) dlr.deUNSPECIFIED
Date:March 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:167
Status:Published
Keywords:Analytical methods, numerical methods, load distribution, mechanically fastend joints
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation, L - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Böhringer-Thelen, Isolde
Deposited On:12 Aug 2019 03:49
Last Modified:12 Aug 2019 03:49

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