Experimental and numerical study of process-induced total spring-in of corner-shaped composite parts

Date

2017-07-01

Author

Cicek, K. Furkan
Erdal Erdoğmuş, Merve
Kayran, Altan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

187
views

0
downloads

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 parts are manufactured via autoclave-forming technique. Process-induced total spring-in, due to the combined effect of material anisotropy and tool-part interaction, at different sections of the U-shaped parts are measured with use of the combination of the three-dimensional optical scanning technique and the generative shape design. Total spring-in determined by the numerical model is found to be in good agreement with the average total spring-in measured experimentally. The effect of tool-part interaction mechanism on the total spring-in is studied separately to ascertain its effect on the total spring-in behavior clearly. It is shown that with the proper modeling of the tool-part interaction, numerically determined total spring-in approaches the experimentally determined total spring-in.

Subject Keywords

Composite laminates, Autoclave manufacturing, Total spring-in, Finite element analysis, Total spring-in measurement, Optical scanning

URI

https://hdl.handle.net/11511/40234

Journal

JOURNAL OF COMPOSITE MATERIALS

DOI

https://doi.org/10.1177/0021998316669993

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Experimental and numerical study of spring-in angle in corner shaped composite parts Çiçek, Kerem Furkan; Erdal Erdoğmuş, Merve; Kayran, Altan; Department of Mechanical Engineering (2014) 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...
Theoretical study of tetramethyl- and tetra-tert-butyl-substituted cyclobutadiene and tetrahedrane Balcı, Metin; McKee, ML; Schleyer, PV (2000-02-17) The tetramethyl and tetra-tert-butyl derivatives of cyclobutadiene and tetrahedrane have been studied with ab initio and density functional methods. The ring in tetra-tert-butylcyclobutadiene displays very unequal bond lengths (1.354, 1.608 Angstrom) and confirms the earlier suspicion that the low-temperature X-ray structure was distorted. The C-C single bonds have the longest separations found to date between sp(2)-hybridized carbons. Tetra-rert-butyltetrahedrane, which prefers T over Td symmetry, is calcu...
Experimental Realization of Single Current Diffusion Tensor Magnetic Resonance Electrical Impedance Tomography Sadighi, Mehdi; Şişman, Mert; Açıkgöz, Berk Can; Eyüboğlu, Behçet Murat (2020-08-08) To obtain low-frequency anisotropic conductivity distribution of biological tissues recently Diffusion Tensor Magnetic Resonance Electrical Impedance Tomography (DT-MREIT), which is combination of DTI and MREIT techniques, is proposed. There are two in vivo applications of DT-MREIT in the literature where two linearly independent current injection patterns are used. Decreasing the number of current injection patterns to one improves the feasibility of DT-MREIT in clinical applications. In this study, DT-MRE...
Investigation of crack growth along curved interfaces in L-shaped composite and polymers Yavas, D.; Gozluklu, B.; Çöker, Demirkan (2014-01-01) Delamination in unidirectional L-shaped composite laminates is modeled with two L-shaped polycarbonate plates bonded to each other where the effect of pre-crack length on the stability of the crack growth is investigated experimentally and computationally. In the experimental study, a unique testing fixture with a sliding platform is designed to create a pure vertical displacement to one of the arms. The full-field technique of photoelasticity is used in order to visualize isochromatic fringe pattern around...
ELECTRICAL-IMPEDANCE TOMOGRAPHY OF TRANSLATIONALLY UNIFORM CYLINDRICAL OBJECTS WITH GENERAL CROSS-SECTIONAL BOUNDARIES IDER, YZ; Gençer, Nevzat Güneri; ATALAR, E; TOSUN, H (1990-03-01) An algorithm is developed for electrical impedance tomography (EIT) of finite cylinders with general cross-sectional boundaries and translationally uniform conductivity distributions. The electrodes for data collection are assumed to be placed around a crosssectional plane; therefore the axial variation of the boundary conditions and also the potential field are expanded in Fourier series. For each Fourier component a two-dimensional (2-D) partial differential equation is derived. Thus the 3-D forward probl...

Citation Formats

K. F. Cicek, M. Erdal Erdoğmuş, and A. Kayran, “Experimental and numerical study of process-induced total spring-in of corner-shaped composite parts,” JOURNAL OF COMPOSITE MATERIALS, pp. 2347–2361, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40234.