A study on validity of using average fiber aspect ratio for mechanical properties of aligned short fiber composites with different fiber aspect ratios

Lee, Jae-Kon

doi:10.1007/s00419-007-0138-9

Cited by 6 publications

(4 citation statements)

References 13 publications

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“…in which κ 1 = ψ (1) 0 , J, ψ (4) 0 , κ 2 = ψ (2) 0 , J, ψ (5) 0 , κ 3 = ψ (3) 0 , J, ψ (6) 0 . Thus zero eigenfunctions satisfy the adjoint relationships of the symplectic orthogonality:…”

Section: The Adjoint Relationships Of the Symplectic Orthogonality Bementioning

confidence: 99%

“…Recently, a considerable effort has been devoted to developing the theories about the strength and toughness of the fiber reinforced composites [1,2], since it is essential to understand how stresses are transferred at the interface of the composites. Aveston and Kelly [3] assumed that a constant shear stress acted at the fiber-matrix interface.…”

Section: Introductionmentioning

confidence: 99%

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The symplectic system method in the stress analysis of 2D elasto-viscoelastic fiber reinforced composites

Zhang

Xü

2009

Arch Appl Mech

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With the aid of the variational method and Laplace transformation, the symplectic system method is employed into two-dimensional elastic-viscoelastic fiber reinforced composites. The fundamental eigenfunctions of the governing equations are generalized to the time domain. Therefore the problem can be discussed directly in the time domain, and the iterative application of Laplace transformation is not needed. Using this method, all the stress components of the inner fiber and outer matrix, and hence the stress transfer in the interface between the fiber and matrix, are expressed analytically. The results obtained by the approach are accurate, because all the boundary conditions prescribed on the surfaces and ends of the composites can be satisfied. Numerical example demonstrate that both the shear stress and the normal stress decrease with time due to the viscoelastic property of the matrix, and that stress concentration occurs near the end.

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Section: The Adjoint Relationships Of the Symplectic Orthogonality Bementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The symplectic system method in the stress analysis of 2D elasto-viscoelastic fiber reinforced composites

Zhang

Xü

2009

Arch Appl Mech

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“…This is because the particle size of the original ceramic powders is too large to infiltrate evenly into inner cross-linked space. Ultimately, the large inter-space between uneven matrix and alumina fibres may lead to weak bonding at the fibre/matrix interface, which can not transfer the internal stress from matrix to fibres in time, while carrying external loads [20,21]. Besides, the alumina fibres treated for 1 min in the second-step ball-milling process are uniformly distributed in ceramic powders (Fig.…”

Section: Effects Of Ball-milling Timementioning

confidence: 99%

Mechanical properties of large-sized thin architectural ceramic plate enhanced by alumina fibres and in situ mullite whiskers

Zhong

Cao

Huang

et al. 2022

PAC

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The fibres reinforced thin architectural ceramic plates of 900?1800?2.5mm with excellent mechanical properties were prepared by fast-sintering method using a controllable fibre dispersion process. The effects of ball-milling time on dispersity, average length-to-diameter ratio and microstructure of alumina fibres were investigated. Meanwhile, the effects of alumina fibre contents on the bulk density, water absorption, phase transformation and microstructure of the thin ceramic plate were researched. It was found that the two-step ball-milling process can effectively control the average length-to-diameter ratio of alumina fibres, achieving a good dispersion mixture of fibres and ceramic powders. Ceramics bulk density and bending strength increase with fibre contents rise from 0 to 5 wt.% and then decrease with further fibre content addition from 5 to 15wt.%. The in situ formed mullite whiskers via fast-sintering method are beneficial for protecting fibres and fibre/matrix interfaces. The maximum value of bending strength and fracture toughness reach 147MPa for 5 wt.% fibre contents and 2.6MPa?m1/2 for 9 wt.%fibre contents, corresponding to the strengthening of alumina fibres and the formation of mullite whiskers in fibre/matrix interfaces and matrix via fast-sintering process.

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“…1 (d)), this is because original ceramic powders are too agglomerating to in ltrate evenly into the inner cross-linked space. Ulteriorly, the numerous inter-space between uneven matrix and alumina bers may lead to weak bonding between ber/matrix interface, which can't transfer the internal stress from matrix to bers in time while carrying external loads [20][21].…”

Section: Characterizationmentioning

confidence: 99%

Preparation and Mechanical Property of Alumina Fibers Reinforced Thin Architectural Ceramic Plate

Zhong

Li-yun

Huang

et al. 2021

Preprint

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The fibers reinforced thin architectural ceramic plate of 900 mm×1800 mm×2.5 mm with high mechanical property was prepared by a fast-sintering method with a controllable fiber dispersion process. The effects of ball-milling time to the dispersity, average length-diameter ratio and microstructure of alumina fibers were investigated respectively. Meanwhile, the alumina fiber contents to the volume density, water absorption, phase transformation and microstructure of the thin ceramic plate were researched. It is found that the two-steps ball-milling process can control the average length-diameter ratio of the alumina fibers effectively and achieve a well dispersion mixture of fibers and ceramic powders, the fast-sintering method is beneficial for the protection of fiber/matrix interface. The trend of the volume density and bending strength increases with the fiber content from 0 wt% to 5 wt% and then decreases with the fiber content from 5 wt% to 15 wt%. The bending strength of this composite reaches the maximum value of 146.8 MPa with the fiber content is 5 wt%, which is corresponding to the strengthening of alumina fibers and the formation of mullite crystallization in fiber/matrix interface and matrix during the fast-sintering process.

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A study on validity of using average fiber aspect ratio for mechanical properties of aligned short fiber composites with different fiber aspect ratios

Cited by 6 publications

References 13 publications

The symplectic system method in the stress analysis of 2D elasto-viscoelastic fiber reinforced composites

The symplectic system method in the stress analysis of 2D elasto-viscoelastic fiber reinforced composites

Mechanical properties of large-sized thin architectural ceramic plate enhanced by alumina fibres and in situ mullite whiskers

Preparation and Mechanical Property of Alumina Fibers Reinforced Thin Architectural Ceramic Plate

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