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Keywords: porosity
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Journal Articles
Article Type: Research Papers
J Biomech Eng. January 2012, 134(1): 011003.
Published Online: February 9, 2012
... were generated and solved assuming Newtonian liquid properties (viscosity 3.5 mPa s). Post-processing allowed to visualize and quantify the microvascular flow characteristics, to calculate the permeability tensor and corresponding principal permeability axes, as well as the 3D porosity...
Journal Articles
Article Type: Research Papers
J Biomech Eng. October 2011, 133(10): 101001.
Published Online: October 27, 2011
... compounds materials preparation porosity porous materials tissue engineering References 1 Elvitigala , T. R. , Polpitiya , A. D. , Wang , W. , Stöckel , J. , Khandelwal , A. , Quatrano , R. S. , Pakrasi , H. , and Ghosh , B. K. , 2010 , “ High...
Journal Articles
Article Type: Research Papers
J Biomech Eng. September 2011, 133(9): 091003.
Published Online: October 4, 2011
..., spacing and overlap to be used in the robotic deposition to attain desired elastic moduli and pore size. Here, we define the porosity as φ : = 1 - ρ * , where ρ * is the relative density, which in turn corresponds to the ratio between the volume occupied by the rods...
Journal Articles
Article Type: Research Papers
J Biomech Eng. July 2011, 133(7): 071005.
Published Online: July 18, 2011
.... Intra-aneurysmal residence time is found to increase rapidly with decreasing stent porosity. Of the three different implants considered in this study, the one with the highest wire density shows the highest increase of intra-aneurysmal residence time for both the straight and the curved parent vessels...
Journal Articles
Article Type: Design Innovations
J Biomech Eng. June 2011, 133(6): 065001.
Published Online: June 22, 2011
... parameters, by implanting the virtual scaffold into a finite element algorithm. 17 12 2010 06 05 2011 22 06 2011 22 06 2011 22 06 2011 biodegradable materials biomedical materials finite element analysis polymer blends polymer fibres porosity surgery tissue engineering...
Journal Articles
Article Type: Research Papers
J Biomech Eng. May 2011, 133(5): 051007.
Published Online: April 28, 2011
... is important both for the post-treatment mechanical loading and the risk of intraoperative extraosseous leakage. We have developed a computational model that describes the flow of biomaterials in porous bone structures by considering the material porosity, the region-dependent intrinsic permeability...
Journal Articles
Article Type: Research Papers
J Biomech Eng. January 2011, 133(1): 011001.
Published Online: December 22, 2010
... and sometimes conflicting functional requirements. A functionally gradient porosity function is used to vary the porosity of the designed scaffolds spatially to mimic the functionality of tissues or organs. The three-dimensional porous structures of the scaffold are geometrically partition into functionally...
Journal Articles
Article Type: Technical Briefs
J Biomech Eng. July 2010, 132(7): 074502.
Published Online: June 2, 2010
... graded materials hydrogels physiological models porosity viscoelasticity biomechanics soft tissues finite element method large strain biphasic Natural soft tissues have an intricate architecture and demonstrate complex mechanical behavior. The purpose of this paper...
Journal Articles
Article Type: Research Papers
J Biomech Eng. June 2010, 132(6): 061006.
Published Online: April 22, 2010
... contact permeability porosity sliding friction Porous media theories are widely applicable to the analysis of hydrated biological tissues, where they can describe the deformation of the solid matrix and flow of interstitial fluid. In the study of soft tissues in particular, large deformations...
Journal Articles
Article Type: Research Papers
J Biomech Eng. May 2010, 132(5): 051008.
Published Online: March 29, 2010
..., the displacement field was tracked using 400 nm nanobeads as space markers. The corresponding strain and porosity fields were calculated from the experimental observations. Finally, experimental data were used to validate a computational model for fluid flow and deformation in soft porous media. Our studies...
Journal Articles
Article Type: Research Papers
J Biomech Eng. December 2009, 131(12): 121003.
Published Online: October 29, 2009
...Carlos Bonifasi-Lista; Elena Cherkaev; Yener N. Yeni This work deals with the study of the analytical relations between porosity of cancellous bone and its mechanical properties. The Stieltjes representation of the effective shear complex modulus of cancellous bone is exploited to recover porosity...
Journal Articles
Article Type: Research Papers
J Biomech Eng. October 2009, 131(10): 101007.
Published Online: September 2, 2009
...Gaffar Gailani; Mohammed Benalla; Rashal Mahamud; Stephen C. Cowin; Luis Cardoso Permeability of the mineralized bone tissue is a critical element in understanding fluid flow occurring in the lacunar-canalicular porosity (PLC) compartment of bone and its role in bone nutrition...
Journal Articles
Article Type: Technical Briefs
J Biomech Eng. September 2009, 131(9): 094505.
Published Online: August 7, 2009
... to fluid flow at the bone/soft tissue interface of the porosities in the bone. biological fluid dynamics bone cellular biophysics physiological models porosity It is generally accepted that bone grows and remodels in response to the requirements of applied loading. If the basic assumption...
Journal Articles
Article Type: Research Papers
J Biomech Eng. August 2009, 131(8): 081005.
Published Online: July 2, 2009
... e 0 ( x ) = e ( x , t = 0 ) (ratio of fluid to solid content before deformation). The spatiotemporally varying void ratio e ( x , t ) is related to the porosity of the hydrogel via n ( x , t ) = 1 / 1 + e ( x , t ) ( 43...
Journal Articles
Article Type: Research Papers
J Biomech Eng. May 2009, 131(5): 051007.
Published Online: April 9, 2009
... accumulation method was shown to be capable of identifying the clinically inferior THA stem, and it also produced damage patterns that mirrored those seen in vivo. However, much shorter component life was predicted than was measured experimentally. Another theoretical study ( 17 ) found that porosity...
Journal Articles
Article Type: Research Papers
J Biomech Eng. February 2009, 131(2): 021002.
Published Online: December 9, 2008
... initial porosity, hydraulic conductivity, and elastic modulus. These results imply that an identical macroscopic freezing protocol may result in different microstructural alterations of poroelastic materials depending on the structural properties of the matrix. This may be relevant to understanding...
Journal Articles
Article Type: Research Papers
J Biomech Eng. February 2009, 131(2): 021001.
Published Online: December 9, 2008
... of vascular porosity in osteonal properties. The proposed method is suitable for identification of elastic constants from nanoindentation experiments and could be adapted to other (bio)materials, for which it is possible to describe elastic properties using a fabric-based model. The contribution...
Journal Articles
Article Type: Research Papers
J Biomech Eng. January 2009, 131(1): 011004.
Published Online: November 18, 2008
... are presented and fitted. Parameter variation studies for the larger indenter show that for this case the VE and PE time responses overlap in time, necessitating the use of both models. biomechanics bone finite element analysis indentation orthopaedics physiological models porosity viscoelasticity...
Journal Articles
Article Type: Research Papers
J Biomech Eng. August 2008, 130(4): 041011.
Published Online: June 11, 2008
... 2 diameter of the specimen, D = 2.5 mm 3 diameter of the indenter, d = 1.0 mm 4 porosity of the specimen, φ f = 0.8 5 Lamé constants, λ = 0.1 MPa and μ = 0.2 MPa 6 hydraulic permeability of the specimen, κ = 0.75...
Journal Articles
Article Type: Research Papers
J Biomech Eng. December 2007, 129(6): 863–872.
Published Online: March 7, 2007
... in a large cohort of animals. The aim of this study is to provide a detailed database against which in vivo results can be analyzed. Six custom designed flow divertors were fabricated and tested in vitro. The design matrix included three different porosities (75%, 70%, and 65%). For each porosity, there were...