Research/Scholarly/Creative Works

• Bagalkot A., Pons D., Symons D. and Clucas D. (2022) The Effects of Cooling and Shrinkage on the Life of Polymer 3D Printed Injection Moulds. Polymers 14(3) http://dx.doi.org/10.3390/polym14030520. (Journal Articles)

• Erfani N., Symons D., Fee C. and Watson M. (2022) A Novel Method to Design Monolithic Catalysts for Non-Isothermal Packed-Bed Reactors Using Topology Optimisation. Chemical Engineering Science http://dx.doi.org/10.1016/j.ces.2022.118347. (Journal Articles)

• Erfani N., Symons D., Fee C. and Watson M. (2022) Topology optimisation using genetic algorithm and density-based method: A comparative case study. Chemical Engineering Science. (Journal Articles)

• Nourani SA., Pons DJ., Symons D. and Zhang S. (2022) Multiscale Analogue Modelling of Clinching Process to Investigate Thickness Tolerance and Tool Misalignment. Materials 15(10) http://dx.doi.org/10.3390/ma15103674. (Journal Articles)

• Nourani SA., Pons DJ., Tamadon A. and Symons D. (2021) Microstructural deformation in the clinching process. Journal of Advanced Joining Processes 3 http://dx.doi.org/10.1016/j.jajp.2021.100041. (Journal Articles)

• Symons D. and Brooks T. (2020) Design of a tandem racing bicycle. Auckland, New Zealand: Manufacturing, Design & Entrepreneurship Conference MaDE2020, 7-8 Dec 2020. (Conference Contributions - Other)

• Symons D. and Brooks T. (2020) Loading and structural performance of tandem bicycle frames. Christchurch, New Zealand: Sport & Exercise Science NZ Conference, 25-27 Nov 2020. (Conference Contributions - Other)

• Symons D. and Murton B. (2020) Energy absorption of FDM 3D printed TPMS structures. Auckland, New Zealand: Manufacturing, Design & Entrepreneurship Conference MaDE2020, 7-8 Dec 2020. (Conference Contributions - Other)

• Symons D., Stilwell G. and Murton B. (2020) Design and development of a quick release arm brace for a Paralympic cyclist. Auckland, New Zealand: Manufacturing, Design & Entrepreneurship Conference MaDE2020, 7-8 Dec 2020. (Conference Contributions - Other)

• Bagalkot A., Pons D., Clucas D. and Symons D. (2019) A methodology for setting the injection moulding process parameters for polymer rapid tooling inserts. Rapid Prototyping Journal 25(9): 1493-1505. http://dx.doi.org/10.1108/RPJ-10-2017-0217. (Journal Articles)

• Bagalkot A., Pons D., Symons D. and Clucas D. (2019) Categorization of failures in polymer rapid tools used for injection molding. Processes 7(1) http://dx.doi.org/10.3390/pr7010017. (Journal Articles)

• Kopsch T., Murnane D. and Symons D. (2019) Development of an adaptive bypass element for passive entrainment flow control in dry powder inhalers. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233(15): 5201-5213. http://dx.doi.org/10.1177/0954406219845416. (Journal Articles)

• Kopsch T., Murnane D. and Symons D. (2019) Air Flow Entrainment of Lactose Powder: Simulation and Experiment. In Gutschmidt S; Hewett J; Sellier M (Ed.), IUTAM Symposium on Recent Advances in Moving Boundary Problems in Mechanics Proceedings of the IUTAM Symposium on Moving Boundary Problems, Christchurch, New Zealand, February 12-15, 2018: 107-117. Switzerland: Springer. http://dx.doi.org/10.1007/978-3-030-13720-5_10. (Chapters)

• Kopsch T., Murnane D. and Symons D. (2019) Air flow entrainment of lactose powder: Simulation and experiment. In Gutschmidt S; Hewett J; Sellier M (Eds). IUTAM Bookseries 34: 107-117. Cham: Springer Verlag. http://dx.doi.org/10.1007/978-3-030-13720-5_10. (Conference Contributions - Published)

• Stilwell G., Gooch S. and Symons D. (2019) Quantitative strength considerations for the design of devices for people with tetraplegia in New Zealand. Auckland, New Zealand: Manufacturing and Design Conference MaD2019, 20-21 May 2019. (Conference Contributions - Other)

• Stilwell G., Symons D., Gooch S. and Dunn J. (2019) Measurement of Multidirectional Arm Strength for People in a Seated Position. In. (Conference Contributions - Published)

• Bagalkot A., Pons D., Symons D. and Clucas D. (2018) Polymer Rapid Tooling for Injection Moulding (NZ Product Accelerator Annual Research Symposium, Wellington, New Zealand). In. (Conference Contributions - Published)

• Fitton B. and Symons D. (2018) A mathematical model for simulating cycling: applied to track cycling. Sports Engineering 21(4): 409-418. http://dx.doi.org/10.1007/s12283-018-0283-0. (Journal Articles)

• Fitton B., Caddy O. and Symons D. (2018) The impact of relative athlete characteristics on the drag reductions caused by drafting when cycling in a velodrome. Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology 232(1): 39-49. http://dx.doi.org/10.1177/1754337117692280. (Journal Articles)

• Kopsch T., Murnane D. and Symons D. (2018) Computational modelling and experimental validation of drug entrainment in a dry powder inhaler. International Journal of Pharmaceutics 553(1-2): 37-46. http://dx.doi.org/10.1016/j.ijpharm.2018.10.021. (Journal Articles)

• Murnane D., Kopsch T. and Symons D. (2018) Addressing Inter-patient Variability in DPIs: Optimizing Powder Entrainment using CFD-guided DPI Design. In 1: 73-82. (Conference Contributions - Published)

• Symons D., Kopsch T. and Murnane D. (2018) Computational design optimization of a dry powder inhaler. Auckland: Manufacturing & Design Conference MaD2018, 21-22 May 2018. (Conference Contributions - Other)

• Caddy O., Fitton W., Symons D., Purnell A. and Gordon D. (2017) The effects of forward rotation of posture on computer-simulated 4-km track cycling: Implications of Union Cycliste Internationale rule 1.3.013.. Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology 231(1): 3-13. http://dx.doi.org/10.1177/1754337115619306. (Journal Articles)

• Fitton B. and Symons DD. (2017) The characterisation of bicycle tyres and their impact on event performance for athletes of differing abilities. Tel Aviv, Israel: 8th Asia-Pacific Congress on Sports Technology, (APCST 2017), 15-19 Oct 2017. (Conference Contributions - Other)

• Fitton B., Symons DD. and Caddy O. (2017) Exploring existing physiological models for short intermittent exercise. Jaipur, India: International Conference on Sports Engineering (ICSE-2017), 23-25 Oct 2017. (Conference Contributions - Other)

• Kopsch T., Murnane D. and Symons D. (2017) A personalized medicine approach to the design of dry powder inhalers: Selecting the optimal amount of bypass. International Journal of Pharmaceutics 529(1-2): 589-596. http://dx.doi.org/10.1016/j.ijpharm.2017.07.002. (Journal Articles)

• Kopsch T. and Symons DD. (2016) Design and optimization of a passive flow control device. Cheshire, UK: SIMULIA Regional User Meeting, 2-3 Nov 2016. (Conference Contributions - Other)

• Kopsch T., Murnane D. and Symons D. (2016) Optimizing the Entrainment Geometry of a Dry Powder Inhaler: Methodology and Preliminary Results. Pharmaceutical Research 33(11): 2668-2679. http://dx.doi.org/10.1007/s11095-016-1992-3. (Journal Articles)

• Kopsch T., Symons D. and Murnane D. (2016) Modelling drug entrainment in a dry powder inhaler: Benchmarking and sensitivity analysis of a multiphase CFD approach. In. (Conference Contributions - Published)

• Kopsch T., Symons DD. and Murnane D. (2015) Design-Optimization of Dry Powder Inhalers: Selecting an Objective Function. In Proceedings of the Drug Delivery to the Lungs Conference (DDL26) http://dx.doi.org/10.1089/jamp.2016.ab01.abstracts?src=recsys. (Conference Contributions - Published)

• Symons DD. and Bizard AFM. (2015) Measurement of fluid flow thickness within a rotating cone. Journal of Fluids Engineering, Transactions of the ASME 137(6) http://dx.doi.org/10.1115/1.4029728. (Journal Articles)

• Bell GRA., Symons DD. and Pease JR. (2014) Mathematical model for solids transport power in a decanter centrifuge. Chemical Engineering Science 107: 114-122. http://dx.doi.org/10.1016/j.ces.2013.12.007. (Journal Articles)

• Parisini I., Cheng SJ., Symons DD. and Murnane D. (2014) Potential of a cyclone prototype spacer to improve in vitro dry powder delivery. Pharmaceutical Research 31(5): 1133-1145. http://dx.doi.org/10.1007/s11095-013-1236-8. (Journal Articles)

• Parisini I., Cheng SJ., Symons DD. and Murnane D. (2014) A combined computational fluid dynamic (CFD) and compendial testing approach to optimize miniaturized cyclone spacers for commercial inhalers. In Proceedings of Respiratory Drug Delivery 2014 3: 661-664. (Conference Contributions - Published)

• Symons DD. and Bizard AFM. (2014) Measurement of film thickness for continuous fluid flow within a spinning cone. In ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis, ESDA 2014 2: 7. http://dx.doi.org/10.1115/ESDA2014-20129. (Conference Contributions - Published)

• Symons DD., Chen J. and Alton P. (2014) Calculation of optimal jaw geometry for an electronic bond pull test. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228(11): 1847-1858. http://dx.doi.org/10.1177/0954406213511963. (Journal Articles)

• Bizard AFM., Symons DD., Fleck NA. and Grimwood GC. (2013) Design guidelines for granular particles in a conical centrifugal filter. Chemical Engineering Research and Design 91(2): 348-360. http://dx.doi.org/10.1016/j.cherd.2012.07.008. (Journal Articles)

• Parisini I., Cheng SJ., Symons DD. and Murnane D. (2013) Patient-Centred Performance Testing of a Dry Powder Spacer: A Pilot Study Using Inhalation Profiles from Healthy Volunteers to Assess Drug Delivery Performance. In Proceedings of the Drug Delivery to the Lungs Conference (DDL24). (Conference Contributions - Published)

• Parisini I., Cheng SJ., Symons DD. and Murnane D. (2013) Studying deagglomeration process for dry powder inhaler formulations in reverse flow cyclone device. In Proceedings of APS PharmSci 2013. (Conference Contributions - Published)

• Symons KE., Moncaster A. and Symons DD. (2013) An Application of the CEN/TC350 standards to an Energy and Carbon LCA of timber used in construction, and the effect of End-of-Life scenarios. Sydney, Australia: Australian LCA Society Conference (ALCAS 2013), 15-18 Jul 2013. (Conference Contributions - Other)

• Zimarev D., Parks GT. and Symons DD. (2013) Computational Modelling and Stochastic Optimisation of Entrainment Geometries in Dry Powder Inhalers. In Proceedings of the Drug Delivery to the Lungs Conference (DDL24). (Conference Contributions - Published)

• Parisini I., Cheng SJ., Symons DD., Brown MB., Kostrzewski A. and Murnane D. (2012) Can a Cyclone Spacer Reduce the Flow Rate Dependence of Dry Powder Inhalation? Bristol, UK: Annual Aerosol Science Conference, 3-4 Apr 2012. (Conference Contributions - Other)

• Parisini I., Cheng SJ., Symons DD., Kostrzewski A. and Murnane D. (2012) A generic dry powder spacer: Proving the principal for commercial carrier-based dry powder inhalers. In Proceedings of the Drug Delivery to the Lungs Conference (DDL23). (Conference Contributions - Published)

• Symons DD. (2012) Frictional flow of damp granular material in a conical centrifuge. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 226(1): 94-103. http://dx.doi.org/10.1177/0954406211412466. (Journal Articles)

• Symons DD. and Siddall R. (2012) Velocity of sliding flow of a dense granular suspension down an inclined plane. Cambridge, UK: Suspension Processing & Suspension Engineering Rheology, 10-11 Sep 2012. (Conference Contributions - Other)

• Symons DD., Chen J. and Alton P. (2012) Calculation of Optimal Jaw Geometry for an Electronic Bond Test. Cheshire, UK: SIMULIA Regional User Meeting, 25-26 Sep 2012. (Conference Contributions - Other)

• Bizard AFM. and Symons DD. (2011) Flow of wet powder in a conical centrifugal filter-an analytical model. Chemical Engineering Science 66(23): 6014-6027. http://dx.doi.org/10.1016/j.ces.2011.08.022. (Journal Articles)

• Bizard AFM., Symons DD., Fleck NA. and Durban D. (2011) Flow of damp powder in a rotating impervious cone. Journal of Applied Mechanics, Transactions ASME 78(2) http://dx.doi.org/10.1115/1.4002581. (Journal Articles)

• Parisini I., Cheng S., Symons D., Brown M., Kostrzewski A. and Murnane D. (2011) Assessment of a cyclone-type spacer device for use in dry powder inhalation. In Journal of Aerosol Medicine and Pulmonary Drug Delivery 26(4): A5-A5. Mary Ann Liebert. http://dx.doi.org/10.1089/jamp.2013.01ab. (Conference Contributions - Published)

• Symons DD. (2011) Integral methods for flow in a conical centrifuge. Chemical Engineering Science 66(13): 3020-3029. http://dx.doi.org/10.1016/j.ces.2011.04.006. (Journal Articles)

• Cheng S. and Symons D. (2010) Simulation of Cyclone Separators in Dry Powder Inhalers. Helsinki, Finland: International Aerosol Conference, 29 Aug-3 Sep 2010. (Conference Contributions - Other)

• Cheng S. and Symons D. (2010) Optimisation of Dry Powder Inhalers Through Robust CFD Simulation of Air Classifiers. In Proceedings of the Drug Delivery to the Lungs Conference (DDL21). (Conference Contributions - Published)

• Gaudern N. and Symons DD. (2010) Comparison of theoretical and numerical buckling loads for wind turbine blade panels. Wind Engineering 34(2): 193-206. http://dx.doi.org/10.1260/0309-524X.34.2.193. (Journal Articles)

• Symons D., Persaud R. and Stanislaus H. (2010) Slip modulus of inclined screws in timber-concrete floors. Proceedings of the Institution of Civil Engineers: Structures and Buildings 163(4): 245-255. http://dx.doi.org/10.1680/stbu.2010.163.4.245. (Journal Articles)

• Symons D., Persaud R. and Stanislaus H. (2010) Strength of inclined screw shear connections for timber and concrete composite construction. Structural Engineer 88(1): 25-32. (Journal Articles)

• Symons K. and Symons D. (2009) Embodied energy and carbon - What structural engineers need to know. Structural Engineer 87(9): 19-23. (Journal Articles)

• Symons DD. and Fleck NA. (2008) The imperfection sensitivity of isotropic two-dimensional elastic lattices. Journal of Applied Mechanics, Transactions ASME 75(5): 0510111-0510118. http://dx.doi.org/10.1115/1.2913044. (Journal Articles)

• Persaud R. and Symons D. (2006) Design and testing of a composite timber and concrete floor system. Journal of the Structural Engineering Society New Zealand 19(1) 7: 30-43. (Journal Articles)

• Persaud R. and Symons D. (2006) Design and testing of a composite timber and concrete floor system. Structural Engineer 84(4): 22-30. (Journal Articles)

• Symons DD., Hutchinson RG. and Fleck NA. (2005) Actuation of the Kagome Double-Layer Grid. Part 1: Prediction of performance of the perfect structure. Journal of the Mechanics and Physics of Solids 53(8): 1855-1874. http://dx.doi.org/10.1016/j.jmps.2005.02.011. (Journal Articles)

• Symons DD., Shieh J. and Fleck NA. (2005) Actuation of the Kagome Double-Layer Grid. Part 2: Effect of imperfections on the measured and predicted actuation stiffness. Journal of the Mechanics and Physics of Solids 53(8): 1875-1891. http://dx.doi.org/10.1016/j.jmps.2005.02.008. (Journal Articles)

• Leung ACH., Symons DD. and Guest SD. (2004) Actuation of kagome lattice structures. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 1: 229-235. http://dx.doi.org/10.2514/6.2004-1525. (Conference Contributions - Published)

• Symons DD. (2004) Inertial liquid loading on the nozzle of a needle-free injection device. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 218(2): 233-240. http://dx.doi.org/10.1243/095440604322886973. (Journal Articles)

• Evans A., Hutchinson J. and Symons D. (2003) High Authority Shape Morphing Truss Structures. Jackson Hole, Wyoming, USA: DARPA Synthetic Multifunctional Materials 2003 PI Meeting, 20 May 2003. (Conference Contributions - Other)

• Fleck N., Tagarielli V., Radford D. and Symons D. (2003) Dynamic Loading of Composite Sandwich Beams. Washington DC, USA: ASME International Mechanical Engineering Congress, 15-21 Nov 2003. (Conference Contributions - Other)

• Crosthwaite M., Stephen E., Mehne A., Smith S., Symons D. and Ahern D. (2001) Cover/stand for portable videophone.Patent No. WO 01/61440, Worldwide. (Intellectual Property)

• Symons DD. (2000) Characterisation of indentation damage in 0/90 lay-up T300/914 CFRP. Composites Science and Technology 60(3): 391-401. http://dx.doi.org/10.1016/S0266-3538(99)00139-6. (Journal Articles)

• Symons DD. and Davis G. (2000) Fatigue testing of impact-damaged T300/914 carbon-fibre-reinforced plastic. Composites Science and Technology 60(3): 379-389. http://dx.doi.org/10.1016/S0266-3538(99)00138-4. (Journal Articles)

• Hallett S. and Symons D. (1997) Testing and Modelling of Impact Failure Mechanisms in Carbon Fibre. Stuttgart, Germany: NAFEMS Word Congress, 9-11 Apr 1997. (Conference Contributions - Other)

Student Supervision

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Current
• PhD - Bagalkot A: Polymer rapid tooling for injection moulding
• PhD - Fitton W: Simulation and Optimisation of Team Cycling Competitions
• PhD - Murton B: Survival orientated aircraft design
• PhD - Nourani S: Applications of Virtual Manufacturing to Study Failure in Clinching Process
• PhD - Stilwell G: Arm strength measurement of people with tetraplegia
Completed
• PhD - Bizard A: Design of Conical Centrifugal Filters – An Analytical Approach (2011)
• PhD - Cheng S: Numerical and Experimental Study of Cyclone Separators for Aerosol Drug Delivery (2012)
• PhD - Kopsch T: Computational Modelling & Optimization of Dry Powder Inhalers (2018)
• PhD - Persaud R: Structural Behaviour of a Composite Timber and Concrete Floor System Incorporating Steel Decking as Permanent Formwork (2007)
• Masters - Zalzali A: Frictional Behaviour of Granular Materials in a Conical Centrifugal Filter (2017)
• Masters - Zimarev D: Computational Modelling and Stochastic Optimisation of Entrainment Geometries in Dry Powder Inhalers (2013)

Editorial Work

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• Proceedings of the Institution of Mechanical Engineers Part C: Journal of Mechanical Engineering Science Associate Editor ( 2013 - 2023)

Future Research

• Paralympic sports equipment design