Analysis of pultrusion process for thick glass/polyester composites: transverse shear stress formations

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Abstract

In the present work process-induced residual stress development is described for a 100 × 100 mm pultruded square profile made of glass/polyester. A thermo-chemical model developed in MATLAB is coupled with a mechanical model developed in ABAQUS. The temperature and degree of cure distributions are calculated for three different preheating temperatures. In the mechanical model, a parameter study is examined to investigate the effect of total volumetric shrinkage (V sh) and the coefficient of thermal expansion (CTE) in rubbery state on the residual stresses. The non-uniform internal constraints in the part yield in an internal shear deformation during the process. The transverse shear stress and compressive normal stress levels decrease significantly as compared with the tensile normal stresses with an increase in preheating temperature. The change in V sh and CTE in rubbery state affects the shear stresses and compressive stresses significantly, whereas the tensile stresses are less affected.
Original languageEnglish
Pages (from-to)124-132
JournalAdvanced manufacturing: polymer & composites
Volume2
Issue number3-4
DOIs
Publication statusPublished - 17 Jan 2017

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Pultrusion
Polyesters
Shear stress
Preheating
Glass
Thermal expansion
Residual stresses
Composite materials
ABAQUS
Compressive stress
Tensile stress
Temperature
Shear deformation
MATLAB
Polyester

Keywords

  • IR-103258
  • METIS-321352

Cite this

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title = "Analysis of pultrusion process for thick glass/polyester composites: transverse shear stress formations",
abstract = "In the present work process-induced residual stress development is described for a 100 × 100 mm pultruded square profile made of glass/polyester. A thermo-chemical model developed in MATLAB is coupled with a mechanical model developed in ABAQUS. The temperature and degree of cure distributions are calculated for three different preheating temperatures. In the mechanical model, a parameter study is examined to investigate the effect of total volumetric shrinkage (V sh) and the coefficient of thermal expansion (CTE) in rubbery state on the residual stresses. The non-uniform internal constraints in the part yield in an internal shear deformation during the process. The transverse shear stress and compressive normal stress levels decrease significantly as compared with the tensile normal stresses with an increase in preheating temperature. The change in V sh and CTE in rubbery state affects the shear stresses and compressive stresses significantly, whereas the tensile stresses are less affected.",
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Analysis of pultrusion process for thick glass/polyester composites : transverse shear stress formations. / Baran, Ismet .

In: Advanced manufacturing: polymer & composites, Vol. 2, No. 3-4, 17.01.2017, p. 124-132.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Baran, Ismet

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AB - In the present work process-induced residual stress development is described for a 100 × 100 mm pultruded square profile made of glass/polyester. A thermo-chemical model developed in MATLAB is coupled with a mechanical model developed in ABAQUS. The temperature and degree of cure distributions are calculated for three different preheating temperatures. In the mechanical model, a parameter study is examined to investigate the effect of total volumetric shrinkage (V sh) and the coefficient of thermal expansion (CTE) in rubbery state on the residual stresses. The non-uniform internal constraints in the part yield in an internal shear deformation during the process. The transverse shear stress and compressive normal stress levels decrease significantly as compared with the tensile normal stresses with an increase in preheating temperature. The change in V sh and CTE in rubbery state affects the shear stresses and compressive stresses significantly, whereas the tensile stresses are less affected.

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