All Outputs (16)

Characterisation of 3D woven textile composites in presence of minor weft tow undulations and cross-section variations (2024)
Journal Article
Xu, M., Sitnikova, E., Kong, W., Zhang, J., Hu, S., & Li, S. (2024). Characterisation of 3D woven textile composites in presence of minor weft tow undulations and cross-section variations. Journal of Composite Materials, 58(25), 2671-2691. https://doi.org/10.1177/00219983241270939

Weft tows in 3D woven composites are commonly approximated as perfectly straight, but their undulations are inevitable in reality, although the extent of undulations in the weft tows is not as pronounced as in the warp tows. Such minor undulations in... Read More about Characterisation of 3D woven textile composites in presence of minor weft tow undulations and cross-section variations.

A failure criterion for genuinely orthotropic materials and integration of a series of criteria for materials of different degrees of anisotropy (2024)
Journal Article
Xu, M., Sitnikova, E., & Li, S. (2024). A failure criterion for genuinely orthotropic materials and integration of a series of criteria for materials of different degrees of anisotropy. Royal Society Open Science, 11(5), Article 240205. https://doi.org/10.1098/rsos.240205

Existing failure criteria for orthotropic materials are subject to an underlying assumption which cause contradictions when applied to genuinely orthotropic materials that are significantly anisotropic in elasticity as well as in strengths. For such... Read More about A failure criterion for genuinely orthotropic materials and integration of a series of criteria for materials of different degrees of anisotropy.

Laminated beams/shafts of annular cross-section subject to combined loading (2022)
Journal Article
Li, S., Johnson, M. S., Sitnikova, E., Evans, R., & Mistry, P. J. (2023). Laminated beams/shafts of annular cross-section subject to combined loading. Thin-Walled Structures, 182(Part A), Article 110153. https://doi.org/10.1016/j.tws.2022.110153

A novel stress analysis method is developed for the efficient design of radially laminated annular beams/shafts subject to arbitrary load combinations. The analysis is conducted using classic laminate theory (CLT) in conjunction with a mechanics of m... Read More about Laminated beams/shafts of annular cross-section subject to combined loading.

Controllable parameters as the essential components in the analysis, manufacturing and design of 3D woven composites (2022)
Journal Article
Sitnikova, E., Xu, M., Kong, W., & Li, S. (2022). Controllable parameters as the essential components in the analysis, manufacturing and design of 3D woven composites. Composites Science and Technology, 230, Article 109730. https://doi.org/10.1016/j.compscitech.2022.109730

The comprehensive design feasibility for woven composites has been established by identifying the missing component in the design tool for these materials, the so-called controllable parameters. These are the parameters that are involved, directly or... Read More about Controllable parameters as the essential components in the analysis, manufacturing and design of 3D woven composites.

The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations (2022)
Journal Article
Li, S., Xu, M., & Sitnikova, E. (2022). The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations. Journal of Composites Science, 6(3), Article 82. https://doi.org/10.3390/jcs6030082

The quadratic function of the original Tsai–Wu failure criterion for transversely isotropic materials is re-examined in this paper. According to analytic geometry, two of the troublesome coefficients associated with the interactive terms—one between... Read More about The Formulation of the Quadratic Failure Criterion for Transversely Isotropic Materials: Mathematical and Logical Considerations.

Experimental evaluation and theoretical prediction of elastic properties and failure of C/C‐SiC composite (2021)
Journal Article
Shi, Y., Li, S., Sitnikova, E., Cepli, D., & Koch, D. (2022). Experimental evaluation and theoretical prediction of elastic properties and failure of C/C‐SiC composite. International Journal of Applied Ceramic Technology, 19(1), 7-21. https://doi.org/10.1111/ijac.13775

The paper presents experimental characterization and theoretical predictions of elastic and failure properties of continuous carbon fiber reinforced silicon carbide (C/C-SiC) composite fabricated by Liquid Silicon Infiltration (LSI). Its mechanical p... Read More about Experimental evaluation and theoretical prediction of elastic properties and failure of C/C‐SiC composite.

On the objectivity of the nonlinear along-fibre shear stress–strain relationship for unidirectionally fibre-reinforced composites (2021)
Journal Article
Li, S., Xu, M., Yan, S., & Sitnikova, E. (2021). On the objectivity of the nonlinear along-fibre shear stress–strain relationship for unidirectionally fibre-reinforced composites. Journal of Engineering Mathematics, 127(1), https://doi.org/10.1007/s10665-021-10098-3

The nonlinear along-fibre shear stress–strain relationship for unidirectionally fibre-reinforced composites has been investigated in this paper aiming at its applications in general 3D stress conditions in a consistent manner. So far, such relationsh... Read More about On the objectivity of the nonlinear along-fibre shear stress–strain relationship for unidirectionally fibre-reinforced composites.

Representative Volume Elements and Unit Cells: Concepts, Theory, Applications and Implementation (2020)
Book
Li, S., & Sitnikova, E. (2020). Representative Volume Elements and Unit Cells: Concepts, Theory, Applications and Implementation. Elsevier/Woodhead Publishing. https://doi.org/10.1016/C2017-0-03559-0

Numerical methods to estimate material properties usually involve analysis of a representative volume element (RVE) or unit cell (UC). The representative volume element (RVE) or unit cell (UC) is the smallest volume over which a measurement can be ma... Read More about Representative Volume Elements and Unit Cells: Concepts, Theory, Applications and Implementation.

Unification and parameterisation of 2D and 3D weaves and the formulation of a unit cell for composites made of such preforms (2020)
Journal Article
Xu, M., Sitnikova, E., & Li, S. (2020). Unification and parameterisation of 2D and 3D weaves and the formulation of a unit cell for composites made of such preforms. Composites Part A: Applied Science and Manufacturing, 133, Article 105868. https://doi.org/10.1016/j.compositesa.2020.105868

In this paper, the method to unify the definition of woven architectures in textile composites over a wide range of variations has been established. This was achieved via parametrisation of the weaves, which was conducted employing a limited set of c... Read More about Unification and parameterisation of 2D and 3D weaves and the formulation of a unit cell for composites made of such preforms.

On the Representativeness of the Cohesive Zone Model in the Simulation of the Delamination Problem (2019)
Journal Article
Sitnikova, E., Li, D., Wei, J., Yi, X., & Li, S. (2019). On the Representativeness of the Cohesive Zone Model in the Simulation of the Delamination Problem. Journal of Composites Science, 3(1), Article 22. https://doi.org/10.3390/jcs3010022

With the development of finite element (FE) codes, numerical modelling of delamination is often considered to be somewhat commonplace in modern engineering. However, the readily available modelling techniques often undermine the truthful understandin... Read More about On the Representativeness of the Cohesive Zone Model in the Simulation of the Delamination Problem.

Damage related material constants in continuum damage mechanics for unidirectional composites with matrix cracks (2018)
Journal Article
Li, S., Wang, M., Jeanmeure, L., Sitnikova, E., Yu, F., Pan, Q., …Talreja, R. (2019). Damage related material constants in continuum damage mechanics for unidirectional composites with matrix cracks. International Journal of Damage Mechanics, 28(5), 690-707. https://doi.org/10.1177/1056789518783239

Application of a continuum damage mechanics formulation rests on the ease with which the material constants involved in the formulation can be determined. For an initially linear elastic material, the changes in elastic constants induced by damage de... Read More about Damage related material constants in continuum damage mechanics for unidirectional composites with matrix cracks.

A critical review on the rationality of popular failure criteria for composites (2018)
Journal Article
Li, S., & Sitnikova, E. (2018). A critical review on the rationality of popular failure criteria for composites. https://doi.org/10.1016/j.coco.2018.02.002

Popular failure criteria for fibre reinforced composites are subjected to critical scrutiny on their rationality. The rationality of a theory is about the mathematical and physical logic underlying the theory, rather than the closeness of their resul... Read More about A critical review on the rationality of popular failure criteria for composites.

An excursion into representative volume elements and unit cells (2017)
Book Chapter
Li, S., & Sitnikova, E. (2017). An excursion into representative volume elements and unit cells. In P. W. Beaumont, & C. H. Zweben (Eds.), Comprehensive Composite Materials II, Volume 1, Reinforcements and General Theories of Composites (451-489). Amsterdam: Elsevier. https://doi.org/10.1016/B978-0-12-803581-8.10352-2

The objective of this chapter is to provide a comprehensive and systematic account on the subject of representative volume elements (RVEs) and unit cells (UCs). To construct an RVE or UC, intuition has been often perceived sufficient to facilitate th... Read More about An excursion into representative volume elements and unit cells.

The Tsai-Wu failure criterion rationalised in the context of UD composites (2017)
Journal Article
Li, S., Sitnikova, E., Liang, Y., & Kaddour, A. S. (2017). The Tsai-Wu failure criterion rationalised in the context of UD composites. Composites Part A: Applied Science and Manufacturing, 102, 207-217. https://doi.org/10.1016/j.compositesa.2017.08.007

© 2017 The Authors This paper is to rationalise the empirical aspect of the Tsai-Wu failure criterion in the context of UD composites associated with the determination of the interactive strength property F12 based on the analytic geometry. It reveal... Read More about The Tsai-Wu failure criterion rationalised in the context of UD composites.

Subtle features of delamination in cross-ply laminates due to low speed impact (2017)
Journal Article
Sitnikova, E., Li, S., Li, D., & Yi, X. (2017). Subtle features of delamination in cross-ply laminates due to low speed impact. Composites Science and Technology, 149, 149-158. https://doi.org/10.1016/j.compscitech.2017.06.021

In cross-ply laminates, the shape of delamination areas, which form due to low velocity impact, have two subtle features, which have been observed consistently in numerous experiments. Those are the pointed delamination tips and the intact zone betwe... Read More about Subtle features of delamination in cross-ply laminates due to low speed impact.

On understanding the applicability of Mohr-Coulomb failure hypothesis for composite materials using UnitCells© (2016)
Presentation / Conference Contribution
Balasubramani, N. K., Sitnikova, E., & Li, S. (2016). On understanding the applicability of Mohr-Coulomb failure hypothesis for composite materials using UnitCells©.

The applicability of Mohr-Coulomb (M-C) failure hypothesis for anisotropic composite materials is re-examined in this paper. Mohr-Coulomb failure theory has been widely referred to in the literature to study the failure of unidirectional (UD) fibre r... Read More about On understanding the applicability of Mohr-Coulomb failure hypothesis for composite materials using UnitCells©.