TY  - JOUR
AU  - Tang, C. Y.
AU  - Tsui, C. P.
AU  - Lin, W.
AU  - Uskoković, Petar
AU  - Wang, Z. W.
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2468
AB  - A three-dimensional multi-level finite element (FE) modeling approach has been developed to simulate mechanical response and progressive damage behavior of hydroxyapatite/polyetheretherketone (HA/PEEK) porous structures separately under tensile and compressive loadings. Moreover, the densification of the HA/PEEK porous structures under compressive loading was also simulated. Nonlinear constitutive relations of the HA/PEEK composites coupled with both matrix and interfacial debonding damage were determined by using a micro-level FE unit cell model. A Kelvin open-cell model composed of solid beams was used for constructing a meso-level FE model, which was the basic unit for building the porous structure. The relative density of the meso-level model was varied for mimicking different porosity levels. For simulating the progressive damage behavior of the porous structure from initiation to failure, a strain invariant failure criterion for the beams was incorporated into the meso-level FE model. A beam-to-beam self-contact model was adopted to describe the contact behaviors of the beam elements. Six case examples were used for investigating the effects of considering the micro-level composite damage behavior and failure criterion of the beam elements on the mechanical response of the porous structures separately under tensile and compressive loadings. With the proposed method considering both composite damage and beam failure, the predicted tensile and compressive stress-strain responses of the porous structure, including elastic, plateau and densification characteristics under compressive loading, agreed well with the related experimental data in open literature.
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Part B-Engineering
T1  - Multi-level finite element analysis for progressive damage behavior of HA/PEEK composite porous structure
EP  - 30
SP  - 22
VL  - 55
DO  - 10.1016/j.compositesb.2013.05.052
ER  - 

@article{
author = "Tang, C. Y. and Tsui, C. P. and Lin, W. and Uskoković, Petar and Wang, Z. W.",
year = "2013",
abstract = "A three-dimensional multi-level finite element (FE) modeling approach has been developed to simulate mechanical response and progressive damage behavior of hydroxyapatite/polyetheretherketone (HA/PEEK) porous structures separately under tensile and compressive loadings. Moreover, the densification of the HA/PEEK porous structures under compressive loading was also simulated. Nonlinear constitutive relations of the HA/PEEK composites coupled with both matrix and interfacial debonding damage were determined by using a micro-level FE unit cell model. A Kelvin open-cell model composed of solid beams was used for constructing a meso-level FE model, which was the basic unit for building the porous structure. The relative density of the meso-level model was varied for mimicking different porosity levels. For simulating the progressive damage behavior of the porous structure from initiation to failure, a strain invariant failure criterion for the beams was incorporated into the meso-level FE model. A beam-to-beam self-contact model was adopted to describe the contact behaviors of the beam elements. Six case examples were used for investigating the effects of considering the micro-level composite damage behavior and failure criterion of the beam elements on the mechanical response of the porous structures separately under tensile and compressive loadings. With the proposed method considering both composite damage and beam failure, the predicted tensile and compressive stress-strain responses of the porous structure, including elastic, plateau and densification characteristics under compressive loading, agreed well with the related experimental data in open literature.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Part B-Engineering",
title = "Multi-level finite element analysis for progressive damage behavior of HA/PEEK composite porous structure",
pages = "30-22",
volume = "55",
doi = "10.1016/j.compositesb.2013.05.052"
}

Tang, C. Y., Tsui, C. P., Lin, W., Uskoković, P.,& Wang, Z. W.. (2013). Multi-level finite element analysis for progressive damage behavior of HA/PEEK composite porous structure. in Composites Part B-Engineering
Elsevier Sci Ltd, Oxford., 55, 22-30.
https://doi.org/10.1016/j.compositesb.2013.05.052

Tang CY, Tsui CP, Lin W, Uskoković P, Wang ZW. Multi-level finite element analysis for progressive damage behavior of HA/PEEK composite porous structure. in Composites Part B-Engineering. 2013;55:22-30.
doi:10.1016/j.compositesb.2013.05.052 .

Tang, C. Y., Tsui, C. P., Lin, W., Uskoković, Petar, Wang, Z. W., "Multi-level finite element analysis for progressive damage behavior of HA/PEEK composite porous structure" in Composites Part B-Engineering, 55 (2013):22-30,
https://doi.org/10.1016/j.compositesb.2013.05.052 . .

TY  - JOUR
AU  - Tsui, C. P.
AU  - Tang, C. Y.
AU  - Guo, Y. Q.
AU  - Uskoković, Petar
AU  - Fan, Jian-Ping
AU  - Gao, B.
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1615
AB  - The mechanical properties of hydroxyapatite related macroporous biocomposites (MPBs) are influenced by a number of factors, such as the pore size, the filler content and the properties of the matrix and the inclusion. Failure often occurs when the strength of the implant cannot bear the applied mechanical load. In this study, the effects of filler content on the mechanical properties of MPBs have been investigated. A finite element (FE) unit cell model of a macroporous hydroxyapatite-polyetheretherketone (HA-PEEK) biocomposite structure with uniform and interconnected pores has been constructed. In the FE model, the HA particles were assumed to have random distribution, and particle volume fraction would be varied in the PEEK matrix. The material behaviours of both HA and PEEK have been implemented in the ABAQUS finite element code. HA was modelled to exhibit elastic behaviour and undergo plastic softening to a residual strength when a critical stress was reached, while the PEEK matrix would follow elastic-plastic behaviour. The macroscopic compressive stress-strain relations of the macroporous biocomposite structures have been predicted. Increasing particle volume fraction could lead to an increase in the compressive elastic modulus of the structures but a reduction in the compressive strength. The von Mises stress distribution and the effect of stress concentration in the structures with different filler content are also discussed. The proposed model could provide macro-structural and microscopic information of the macroporous biocomposite structure to the designers in order to facilitate the fabrication of this kind of structure with optimum mechanical properties.
PB  - Vsp Bv, Leiden
T2  - Composite Interfaces
T1  - Effects of Filler Content on Mechanical Properties of Macroporous Composites
EP  - 579
IS  - 5-7
SP  - 571
VL  - 17
DO  - 10.1163/092764410X513440
ER  - 

@article{
author = "Tsui, C. P. and Tang, C. Y. and Guo, Y. Q. and Uskoković, Petar and Fan, Jian-Ping and Gao, B.",
year = "2010",
abstract = "The mechanical properties of hydroxyapatite related macroporous biocomposites (MPBs) are influenced by a number of factors, such as the pore size, the filler content and the properties of the matrix and the inclusion. Failure often occurs when the strength of the implant cannot bear the applied mechanical load. In this study, the effects of filler content on the mechanical properties of MPBs have been investigated. A finite element (FE) unit cell model of a macroporous hydroxyapatite-polyetheretherketone (HA-PEEK) biocomposite structure with uniform and interconnected pores has been constructed. In the FE model, the HA particles were assumed to have random distribution, and particle volume fraction would be varied in the PEEK matrix. The material behaviours of both HA and PEEK have been implemented in the ABAQUS finite element code. HA was modelled to exhibit elastic behaviour and undergo plastic softening to a residual strength when a critical stress was reached, while the PEEK matrix would follow elastic-plastic behaviour. The macroscopic compressive stress-strain relations of the macroporous biocomposite structures have been predicted. Increasing particle volume fraction could lead to an increase in the compressive elastic modulus of the structures but a reduction in the compressive strength. The von Mises stress distribution and the effect of stress concentration in the structures with different filler content are also discussed. The proposed model could provide macro-structural and microscopic information of the macroporous biocomposite structure to the designers in order to facilitate the fabrication of this kind of structure with optimum mechanical properties.",
publisher = "Vsp Bv, Leiden",
journal = "Composite Interfaces",
title = "Effects of Filler Content on Mechanical Properties of Macroporous Composites",
pages = "579-571",
number = "5-7",
volume = "17",
doi = "10.1163/092764410X513440"
}

Tsui, C. P., Tang, C. Y., Guo, Y. Q., Uskoković, P., Fan, J.,& Gao, B.. (2010). Effects of Filler Content on Mechanical Properties of Macroporous Composites. in Composite Interfaces
Vsp Bv, Leiden., 17(5-7), 571-579.
https://doi.org/10.1163/092764410X513440

Tsui CP, Tang CY, Guo YQ, Uskoković P, Fan J, Gao B. Effects of Filler Content on Mechanical Properties of Macroporous Composites. in Composite Interfaces. 2010;17(5-7):571-579.
doi:10.1163/092764410X513440 .

Tsui, C. P., Tang, C. Y., Guo, Y. Q., Uskoković, Petar, Fan, Jian-Ping, Gao, B., "Effects of Filler Content on Mechanical Properties of Macroporous Composites" in Composite Interfaces, 17, no. 5-7 (2010):571-579,
https://doi.org/10.1163/092764410X513440 . .