Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Experimental and numerical study of spring-in angle in corner shaped composite parts
Download
index.pdf
Date
2014
Author
Çiçek, Kerem Furkan
Metadata
Show full item record
Item Usage Stats
312
views
154
downloads
Cite This
In this study, spring-in problem encountered in corner shaped composite parts which are made of Hexcel’s AS4/8552 unidirectional (UD) prepregs is investigated. For that purpose, a simple two dimensional (2-D) geometrical model available in the literature is implemented and spring-in is calculated according to this model. Then using autoclave process, U-shaped composite parts are manufactured and spring-in measurements are performed on these parts. Finally, a three dimensional (3-D) numerical model in ABAQUS is constructed by taking tool-part interaction, cure shrinkage and state transformations of resin into account and spring-in simulation is performed. Spring angle of 0.92° found by numerical analysis model is found to be in good agreement with the spring angle of 0.85° found by experimental method. Consequently, an efficient 3-D ABAQUS model is developed for spring-in analysis of corner shaped composite parts.
Subject Keywords
Autoclaves.
,
Composite materials.
,
Manufacturing processes.
URI
http://etd.lib.metu.edu.tr/upload/12617809/index.pdf
https://hdl.handle.net/11511/23978
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Experimental and numerical study of process-induced total spring-in of corner-shaped composite parts
Cicek, K. Furkan; Erdal Erdoğmuş, Merve; Kayran, Altan (2017-07-01)
Process-induced total spring-in of corner-shaped composite parts manufactured via autoclave-forming technique using unidirectional prepreg is studied both numerically and experimentally. In the numerical study, a three-dimensional finite element model which takes into account the cure shrinkage of the resin, anisotropic material properties of the composite part and the tool-part interaction is developed. The outcome of the numerical model is verified experimentally. For this purpose, U-shaped composite part...
Numerical investigation of delamination in L-shaped cross-ply composite bracket
Gümüş, M.; Gözlüklü, B.; Çöker, Demirkan (null; 2014-01-01)
Interlaminar normal stresses are induced with interlaminar shear stresses leading to mixed-mode delamination (MMD) in curved cross-ply composite laminates. Dynamic mixed-mode delamination is studied using explicit finite element method and Cohesive Zone Modelling Dynamic response of the specimen is compared with the experiments.
Electrical transport, optical and thermal properties of polyaniline-pumice composites
YILMAZ, KORAY; Akgoz, A.; Cabuk, M.; Karaagac, H.; KARABULUT, ORHAN; YAVUZ, Mustafa (2011-11-01)
In this study, electrical conductivity, photoconductivity, absorbance and thermal properties of polyaniline (PANI) and polyaniline-pumice composites were investigated. Temperature dependent conductivity and photoconductivity measurements were carried out in the temperature range of 80-400K. The measurements revealed that the dominant conduction mechanisms in polyaniline and 15% pumice doped composite were hopping conduction. The low activation energies calculated for 36% pumice doped composite indicated tha...
Numerical investigation of stiffened composite panel into buckling and post buckling under combined loading
Akay, Erkan; Yaman, Yavuz; Department of Aerospace Engineering (2015)
This thesis presents the investigation of buckling and post buckling behaviour of stiffened thin walled laminated composite aerospace structures subjected to combined in-plane axial and shear loadings. Due to the fact that the state of stress developing especially in the post-buckling stage is quite complicated under the combined loading, the necessary computational model is usually based on Finite Element Modelling (FEM). In this study, after verifying the FEM methodology and completing the sensitivity stu...
Stress analysis of symmetric aluminum composite-laminated beams under a bending moment: Materially nonlinear only
Sayman, O; Belevi, M; Altinhan, M (SAGE Publications, 2005-01-01)
In this study, an elastic-plastic stress analysis is carried out on symmetric laminated composite beams subjected to a bending moment. The composite beam is to be strain hardening. The Bernoulli and Euler hypotheses are assumed to be valid. The Tsai-Hill theory is used as a yield criterion in the solution. The solution is carried out for (90 degrees/0 degrees)(2), (30 degrees/-30 degrees)(2), (45 degrees/-45 degrees)(2), and (60 degrees/-60 degrees)(2) orientations. The bending moment is to be found the hig...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
K. F. Çiçek, “Experimental and numerical study of spring-in angle in corner shaped composite parts,” M.S. - Master of Science, Middle East Technical University, 2014.
