Three-dimensional strain analysis of single-lap bolted joints in thick composites using fibre-optic gauges and the finite-element method

Giuseppe Vincenzo Marannano, Isaicu, Gaetano Restivo

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Bolted joints involving composite plates used to be almost entirely dedicated to aerospace applications. As the need for energy conservation has increased, the field of composite bolted joints has found new applications in ground armoured vehicles. Thick panels able to withstand large in-plane and impact loads are critical. The present investigation evaluates the interior strain field, through the thickness, of a composite plate connected to an aluminium panel with a single-lap bolted joint. The area of interest is the bearing plane region close to the hole because of the presence of stress concentrations that heavily modify the stress field. Experimental data for the bolted joint were recorded by fibre-optic strain gauges that were embedded in the bearing plane of the composite plate. Numerical analyses were performed using ANSYS as a pre-processor and LS-DYNA as a solver. The overall goal was to evaluate the magnitude of contact strains around the hole and through the thickness of the composite. These values were analysed and compared with the finite-element method results: the finite-element analysis correlated reasonably well with the experiments. An investigation of error causes was also carried out, in particular to evaluate the influence of incorrect gauge positioning and the effect of friction coefficients. General design considerations were finally provided, based on the complete three-dimensional finite-element analysis.
Original languageEnglish
Number of pages12
JournalJournal of Strain Analysis for Engineering Design
Volume45
Publication statusPublished - 2010

Fingerprint

Bolted joints
Composite Plates
Fiber Optics
Fiber optics
Gages
Gauge
Finite Element Method
Composite
Finite element method
Bearings (structural)
Three-dimensional
Evaluate
Composite materials
Finite Element
LS-DYNA
Strain Gauge
Stress Concentration
Energy Conservation
ANSYS
Friction Coefficient

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

Cite this

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title = "Three-dimensional strain analysis of single-lap bolted joints in thick composites using fibre-optic gauges and the finite-element method",
abstract = "Bolted joints involving composite plates used to be almost entirely dedicated to aerospace applications. As the need for energy conservation has increased, the field of composite bolted joints has found new applications in ground armoured vehicles. Thick panels able to withstand large in-plane and impact loads are critical. The present investigation evaluates the interior strain field, through the thickness, of a composite plate connected to an aluminium panel with a single-lap bolted joint. The area of interest is the bearing plane region close to the hole because of the presence of stress concentrations that heavily modify the stress field. Experimental data for the bolted joint were recorded by fibre-optic strain gauges that were embedded in the bearing plane of the composite plate. Numerical analyses were performed using ANSYS as a pre-processor and LS-DYNA as a solver. The overall goal was to evaluate the magnitude of contact strains around the hole and through the thickness of the composite. These values were analysed and compared with the finite-element method results: the finite-element analysis correlated reasonably well with the experiments. An investigation of error causes was also carried out, in particular to evaluate the influence of incorrect gauge positioning and the effect of friction coefficients. General design considerations were finally provided, based on the complete three-dimensional finite-element analysis.",
keywords = "ANSYS, FEM, LS-DYNA, bolted joint, composite materials, fibre-optic strain gauge (FOSG)",
author = "Marannano, {Giuseppe Vincenzo} and Isaicu and Gaetano Restivo",
year = "2010",
language = "English",
volume = "45",
journal = "Journal of Strain Analysis for Engineering Design",
issn = "0309-3247",
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TY - JOUR

T1 - Three-dimensional strain analysis of single-lap bolted joints in thick composites using fibre-optic gauges and the finite-element method

AU - Marannano, Giuseppe Vincenzo

AU - Isaicu, null

AU - Restivo, Gaetano

PY - 2010

Y1 - 2010

N2 - Bolted joints involving composite plates used to be almost entirely dedicated to aerospace applications. As the need for energy conservation has increased, the field of composite bolted joints has found new applications in ground armoured vehicles. Thick panels able to withstand large in-plane and impact loads are critical. The present investigation evaluates the interior strain field, through the thickness, of a composite plate connected to an aluminium panel with a single-lap bolted joint. The area of interest is the bearing plane region close to the hole because of the presence of stress concentrations that heavily modify the stress field. Experimental data for the bolted joint were recorded by fibre-optic strain gauges that were embedded in the bearing plane of the composite plate. Numerical analyses were performed using ANSYS as a pre-processor and LS-DYNA as a solver. The overall goal was to evaluate the magnitude of contact strains around the hole and through the thickness of the composite. These values were analysed and compared with the finite-element method results: the finite-element analysis correlated reasonably well with the experiments. An investigation of error causes was also carried out, in particular to evaluate the influence of incorrect gauge positioning and the effect of friction coefficients. General design considerations were finally provided, based on the complete three-dimensional finite-element analysis.

AB - Bolted joints involving composite plates used to be almost entirely dedicated to aerospace applications. As the need for energy conservation has increased, the field of composite bolted joints has found new applications in ground armoured vehicles. Thick panels able to withstand large in-plane and impact loads are critical. The present investigation evaluates the interior strain field, through the thickness, of a composite plate connected to an aluminium panel with a single-lap bolted joint. The area of interest is the bearing plane region close to the hole because of the presence of stress concentrations that heavily modify the stress field. Experimental data for the bolted joint were recorded by fibre-optic strain gauges that were embedded in the bearing plane of the composite plate. Numerical analyses were performed using ANSYS as a pre-processor and LS-DYNA as a solver. The overall goal was to evaluate the magnitude of contact strains around the hole and through the thickness of the composite. These values were analysed and compared with the finite-element method results: the finite-element analysis correlated reasonably well with the experiments. An investigation of error causes was also carried out, in particular to evaluate the influence of incorrect gauge positioning and the effect of friction coefficients. General design considerations were finally provided, based on the complete three-dimensional finite-element analysis.

KW - ANSYS

KW - FEM

KW - LS-DYNA

KW - bolted joint

KW - composite materials

KW - fibre-optic strain gauge (FOSG)

UR - http://hdl.handle.net/10447/52591

M3 - Article

VL - 45

JO - Journal of Strain Analysis for Engineering Design

JF - Journal of Strain Analysis for Engineering Design

SN - 0309-3247

ER -