Dr. Philippe G. Young Profile

Dr. Philippe G. Young

Div. Manager at Simpleware Ltd

SPIE Involvement:

Author

Publications (3)

Proceedings Article | 4 April 2008 Paper

Structural evaluation of a nickel base super alloy metal foam via NDE and finite element

Ali Abdul-Aziz, G. Abumeri, Mohit Garg, P. Young

Proceedings Volume 6929, 69291J (2008) https://doi.org/10.1117/12.776343

KEYWORDS: Foam, Metals, 3D modeling, Solids, Finite element methods, Computed tomography, Failure analysis, Nondestructive evaluation, 3D image processing, Composites

Read Abstract +

Proceedings Article | 29 March 2006 Paper

On the material characterization of a composite using micro CT image based finite element modeling

A. Abdul Aziz, C. Saury, V. Bui Xuan, P. Young

Proceedings Volume 6176, 617605 (2006) https://doi.org/10.1117/12.667766

KEYWORDS: 3D modeling, Composites, Computed tomography, Finite element methods, 3D image processing, X-ray computed tomography, Ceramics, Image segmentation, Image processing, Image filtering

Read Abstract +

Novel techniques for generating robust and accurate meshes based on 3-D imaging data have recently been developed which make the prediction of macro-structural properties of composite structures based on micro-structural composition straightforward. The accuracy of reconstructions is a particular strong point of these new techniques with geometric accuracy only contingent on image quality. Algorithms developed and used are topology preserving, volume preserving and multi-part geometric models can be handled straightforwardly. In addition to modeling different constituent materials as separate mesh domains, material properties can be assigned based on signal strength in the parent image thereby providing a way of modeling continuous variations in properties for an inhomogeneous medium. These new techniques have been applied to the analysis of a ceramic matrix composite which was micro-CT scanned and the influence of imaging parameters on both predicted bulk properties and localized stresses has been explored. This paper utilizes the Computed Tomography (CT) as the NDE technique to characterize the initial matrix porosity's locations and sizes in a Ceramic Matrix Composites (CMC) test specimen. Further, the Finite Element (FE) method is applied to calculate the localized stress field around these pores based on the geometric modeling of the specimen's CT results, using image analysis, geometric modeling and meshing software, ScanIP/ScanFE [1]. The analyses will simulate experimental loading conditions where scanned specimens are then tensile tested to a 0.07 % total strain to identify the matrix cracking locations in relation to the original pores. Additional work is carried out combining the image processing and finite element to investigate the applicability of some novel meshing techniques. Finally, the calculated Finite Element [2-4] localized stress risers are compared with the observed matrix cracking locations. This work is expected to show that an FE model based on an accurate 3-D rendered model from a series of CT slices is an essential tool to quantify the effects of internal macroscopic defects of complex material systems such as CMCs.

Proceedings Article | 19 May 2005 Paper

Structural assessment of metal foam using combined NDE and FEA

Louis Ghosn, Ali Abdul-Aziz, Philippe Young, Richard Rauser

Proceedings Volume 5767, (2005) https://doi.org/10.1117/12.601753

KEYWORDS: Foam, Metals, 3D modeling, Finite element methods, Solids, 3D image processing, Nondestructive evaluation, Computed tomography, X-ray computed tomography, Aerospace engineering

Read Abstract +

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years