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All Outputs (196)

Development of mathematical reference standards for the validation of surface texture parameter calculation software (2018)
Conference Proceeding
Todhunter, L., Leach, R., Lawes, S., Blateyron, F., & Harris, P. (2018). Development of mathematical reference standards for the validation of surface texture parameter calculation software. In n/a

A framework for the validation of surface texture parameter calculation software is proposed. The framework utilises mathematically defined surfaces and mathematically calculated surface texture parameter values to produce a reference against which t... Read More about Development of mathematical reference standards for the validation of surface texture parameter calculation software.

In-process measurement of the surface quality for a novel finishing process for polymer additive manufacturing (2018)
Journal Article
Syam, W. P., Leach, R., Rybalcenko, K., Gaio, A., & Crabtree, J. (2018). In-process measurement of the surface quality for a novel finishing process for polymer additive manufacturing. Procedia CIRP, 75, 108-113. https://doi.org/10.1016/j.procir.2018.04.088

In the last decade, there has been considerable growth in the production of end-use polymer parts and components using additive manufacturing methods. A wide range of polymers, from Nylon-12 to thermoplastic polyurethane polymers, can be processed wi... Read More about In-process measurement of the surface quality for a novel finishing process for polymer additive manufacturing.

Information-rich surface metrology (2018)
Journal Article
Senin, N., & Leach, R. K. (2018). Information-rich surface metrology. Procedia CIRP, 75, 19-26. https://doi.org/10.1016/j.procir.2018.05.003

Information-rich metrology refers to the incorporation of any type of available information in the data acquisition and processing pipeline of a measurement process, in order to improve the efficiency and quality of the measurement. In this work, the... Read More about Information-rich surface metrology.

An interlaboratory comparison of X-ray computed tomography measurement for texture and dimensional characterisation of additively manufactured parts (2018)
Journal Article
Townsend, A., Racasan, R., Leach, R., Senin, N., Thompson, A., Ramsey, A., …Blunt, L. (2018). An interlaboratory comparison of X-ray computed tomography measurement for texture and dimensional characterisation of additively manufactured parts. Additive Manufacturing, 23, 422-432. https://doi.org/10.1016/j.addma.2018.08.013

This paper presents the results of the CT-STARR (CT-Surface Texture for Additive Round Robin) Stage 1 interlaboratory comparison. The study compared the results obtained for the extraction of areal surface texture data per ISO 25178-2 from five X-ray... Read More about An interlaboratory comparison of X-ray computed tomography measurement for texture and dimensional characterisation of additively manufactured parts.

Curvature-based segmentation of powder bed point clouds for in-process monitoring (2018)
Conference Proceeding
Chung Chee Law, A., Southon, N., Senin, N., Stavroulakis, P., Leach, R., Goodridge, R., & Kong, Z. (2018). Curvature-based segmentation of powder bed point clouds for in-process monitoring. In 29th Annual International Solid Freeform Fabrication Symposium - an Additive Manufacturing Conference 2018

This paper presents a curvature-based analysis of point clouds collected in-process with fringe projection in a polymer powder bed fusion process. The three-dimensional point clouds were obtained from outside of the build chamber with a fringe projec... Read More about Curvature-based segmentation of powder bed point clouds for in-process monitoring.

In-process measurement and monitoring of a polymer laser sintering powder bed with fringe projection (2018)
Journal Article
Southon, N., Stavroulakis, P., Goodridge, R., & Leach, R. (2018). In-process measurement and monitoring of a polymer laser sintering powder bed with fringe projection. Materials and Design, 157, 227-234. https://doi.org/10.1016/j.matdes.2018.07.053

We investigate the feasibility of using fringe projection to monitor the powder bed of a polyamide 12 polymer laser sintering machine. In particular, we demonstrate the ability of fringe projection to identify a number of defects arising during the p... Read More about In-process measurement and monitoring of a polymer laser sintering powder bed with fringe projection.

Band gap behavior of optimal one-dimensional composite structures with an additive manufactured stiffener (2018)
Journal Article
Ampatzidis, T., Leach, R. K., Tuck, C., & Chronopoulos, D. (2018). Band gap behavior of optimal one-dimensional composite structures with an additive manufactured stiffener. Composites Part B: Engineering, 153, https://doi.org/10.1016/j.compositesb.2018.07.012

In this work, the banded behaviour of composite one-dimensional structures with an additive manufactured stiffener is examined. A finite element method is used to calculate the stiffness, mass and damping matrices, and periodic structure theory is us... Read More about Band gap behavior of optimal one-dimensional composite structures with an additive manufactured stiffener.

Error modelling and validation of a high-precision five degree of freedom hybrid mechanism for high-power high-repetition rate laser operations (2018)
Journal Article
Karim, S., Piano, S., Leach, R. K., & Tolley, M. (2018). Error modelling and validation of a high-precision five degree of freedom hybrid mechanism for high-power high-repetition rate laser operations. Precision Engineering, 54, 182-197. https://doi.org/10.1016/j.precisioneng.2018.04.018

The accuracy, repeatability and speed requirements of high-power laser operations demand the employment of five degree of freedom motion control solutions that are capable of positioning and orientating the target with respect to the laser(s)-target... Read More about Error modelling and validation of a high-precision five degree of freedom hybrid mechanism for high-power high-repetition rate laser operations.

A programmable software framework for the generation of simulated surface topography (2018)
Conference Proceeding
Todhunter, L. D., Senin, N., Leach, R., Lawes, S., Blateyron, F., & Harris, P. (2018). A programmable software framework for the generation of simulated surface topography.

A flexible and programmable software framework has been developed that enables the creation of simulated, areal surface topography datasets. The framework allows the creation of surfaces through a layered approach where deterministic topographic stru... Read More about A programmable software framework for the generation of simulated surface topography.

The effects of vibration on fringe projection systems (2018)
Conference Proceeding
Bointon, P., Todhunter, L., Stavroulakis, P., Clare, A., & Leach, R. (2018). The effects of vibration on fringe projection systems.

Mechanical vibration noise is a significant source of error in precision measuring instruments. Errors due to vibration can be detected in measurement signals, and so methods to control mechanical vibration must be considered throughout the design pr... Read More about The effects of vibration on fringe projection systems.

Lateral error compensation for focus variation microscopy (2018)
Conference Proceeding
Pérez, P., Syam, W. P., Albajez, J. A., Santolaria, J., & Leach, R. (2018). Lateral error compensation for focus variation microscopy.

Focus variation microscopy measures both the areal form and areal surface texture of components. Improvements to the accuracy and precision of focus variation microscopes usually requires measurements with multiple image-fields to compensate lateral... Read More about Lateral error compensation for focus variation microscopy.

Feature-based characterisation of evolving surface topographies in finishing operations for additive manufacturing (2018)
Presentation / Conference
Newton, L., Senin, N., Smith, B., & Leach, R. (2018, June). Feature-based characterisation of evolving surface topographies in finishing operations for additive manufacturing. Paper presented at 18th International Conference and Exhibition (euspan)

Finishing operations play a fundamental role in the additive manufacture of components. Conventional surface metrology solutions allow for the characterisation of surface roughness through texture parameters, but are not fully suitable to capture the... Read More about Feature-based characterisation of evolving surface topographies in finishing operations for additive manufacturing.