Effect of ply angle misalignment on out-of-plane deformation of symmetrical cross-ply CFRP laminates: Accuracy of the ply angle alignment

Arao, Yoshihiko; Koyanagi, Jun; Utsunomiya, Shin; Kawada, Hiroyuki

doi:10.1016/j.compstruct.2010.10.019

Cited by 41 publications

(20 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The thermal expansion of the reflector model in the thickness direction cannot be calculated with the shell elements. However, in this analysis, as with the previous study by Arao et al in which the thermal deformation of CFRP plates were calculated based on the lamination theory, 15) the displacement of the neutral plane Trans. Japan Soc.…”

Section: Thermal Deformation Of the Cfrp Reflector Modelmentioning

confidence: 95%

“…Studies on the hygrothermal deformation of CFRP cross-ply plates by Arao et al indicate that a fiber orientation error of 0.4°in standard deviation is inevitable when prepregs are laminated by an expert. 15) As an example, the thermal deformation of the CFRP reflector model calculated when a fiber orientation error of 1°was applied on the uppermost surface of the laminate (i.e., the stacking sequence was assumed to be ½1=ðÀ45=90=45Þ s =0) is shown in Fig. 4.…”

Section: Thermal Deformation Of the Cfrp Reflector Modelmentioning

confidence: 99%

“…14) The Monte Carlo method was also adopted by Arao et al to simulate hygrothermal deformation due to fiber orientation errors of a cross-ply CFRP laminate. 15) In this study, the effect of normally distributed fiber orientation errors on the out-of-plane thermal deformation of a CFRP reflector model was quantitatively investigated using the Monte Carlo method, doing so in the same way as the previous studies mentioned above, to further understand their characteristics. In addition, the relation between the configurations of the CFRP, the number of layers and the stacking sequence, and the magnitude of the thermal deformation were discussed to find a method to mitigate the effect of fiber orientation errors.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quantitative Investigations on the Dimensional Stability of a CFRP Reflector Model against Temperature Variations

Tanaka

Arai

Goto

et al. 2019

Trans. Japan Soc. Aero. S Sci.

View full text Add to dashboard Cite

Carbon fiber reinforced plastic (CFRP) exhibits high specific elasticity and a low coefficient of thermal expansion. Therefore, CFRP is considered to be a suitable material for fabricating reflectors for high-precision, space-based astronomical observation systems. However, non-negligible out-of-plane thermal deformation on CFRP reflectors may occur due to errors in the fiber orientation of each layer. In addition, out-of-plane thermal deformation can be generated because of nonuniform temperature conditions even when no fiber orientation error exists. In this study, the out-of-plane thermal deformation of a CFRP reflector model due to normally distributed fiber orientation errors was probabilistically examined, and methods to mitigate the effect of fiber orientation errors were investigated. The Monte Carlo method was used for analysis. The results demonstrated that increasing the number of layers using thin prepregs was found to be an effective method to mitigate not only the effect of fiber orientation errors, but also out-of-plane thermal deformation modes caused by nonuniform temperature distributions. Furthermore, it was found that the stacking sequence should be appropriately determined to reduce the effect of fiber orientation errors.

show abstract

Section: Thermal Deformation Of the Cfrp Reflector Modelmentioning

confidence: 95%

Section: Thermal Deformation Of the Cfrp Reflector Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative Investigations on the Dimensional Stability of a CFRP Reflector Model against Temperature Variations

Tanaka

Arai

Goto

et al. 2019

Trans. Japan Soc. Aero. S Sci.

View full text Add to dashboard Cite

show abstract

“…Spherical deformation was caused by inhomogeneous heating and cooling in curing process, especially temperature gradient in thickness direction. Saddle-shape deformation was occurred due to fiber misalignment [8].…”

Section: Surface Accuracy Achieved By Replica Methodsmentioning

confidence: 99%

Development of CFRP mirrors for space telescopes

2013

Self Cite

View full text Add to dashboard Cite

CFRP (Caron fiber reinforced plastics) have superior properties of high specific elasticity and low thermal expansion for satellite telescope structures. However, difficulties to achieve required surface accuracy and to ensure stability in orbit have discouraged CFRP application as main mirrors. We have developed ultra-light weight and high precision CFRP mirrors of sandwich structures composed of CFRP skins and CFRP cores using a replica technique. Shape accuracy of the demonstrated mirrors of 150 mm in diameter was 0.8 μm RMS (Root Mean Square) and surface roughness was 5 nm RMS as fabricated. Further optimization of fabrication process conditions to improve surface accuracy was studied using flat sandwich panels. Then surface accuracy of the flat CFRP sandwich panels of 150 mm square was improved to flatness of 0.2 μm RMS with surface roughness of 6 nm RMS. The surface accuracy vs. size of trial models indicated high possibility of fabrication of over 1m size mirrors with surface accuracy of 1μm. Feasibility of CFRP mirrors for low temperature applications was examined for JASMINE project as an example. Stability of surface accuracy of CFRP mirrors against temperature and moisture was discussed.

show abstract

“…In these studies misalignment are determined by both indirect and direct measurement methods. Arao [6] obtained the fibre misalignments indirectly by comparing the numerical analysis to the experimental results composite plate paced into a moist environment obtaining a normal distribution of the fibre misalignments. For this study, the misalignments were found normally distributed with a mean of 0° and a standard deviation of 0.4°.…”

Section: Introductionmentioning

confidence: 99%

Identification and Modelling of the In-Plane Reinforcement Orientation Variations in a CFRP Laminate Produced by Manual Lay-Up

et al. 2017

View full text Add to dashboard Cite

show abstract

Effect of ply angle misalignment on out-of-plane deformation of symmetrical cross-ply CFRP laminates: Accuracy of the ply angle alignment

Cited by 41 publications

References 17 publications

Quantitative Investigations on the Dimensional Stability of a CFRP Reflector Model against Temperature Variations

Quantitative Investigations on the Dimensional Stability of a CFRP Reflector Model against Temperature Variations

Development of CFRP mirrors for space telescopes

Identification and Modelling of the In-Plane Reinforcement Orientation Variations in a CFRP Laminate Produced by Manual Lay-Up

Contact Info

Product

Resources

About