Exploring Feasibility of a Newly Designed Composite Face Shield in - PowerPoint PPT Presentation

Exploring Feasibility of a Newly Designed Composite Face Shield in Mitigation for Blast-Induced Traumatic Brain Injury (bTBI) K WONG M ING TSE (KM TSE) 13th Australasian Injury Prevention and Safety Promotion Conference 1

Introduction • Blast-Induced Injuries ➢ “signature injury of modern wars” ➢ 43% of the wounded in international conflicts. Source: the Defence and Veterans Brain Injury Centre (DVBIC)) 13th Australasian Injury Prevention and Safety Promotion Conference 2

Introduction • Primary Blast Injury (induced by shock wave) 13th Australasian Injury Prevention and Safety Promotion Conference 3

Introduction • Primary Blast Injury (induced by shock wave) Blast Overpressure (Shock wave) 13th Australasian Injury Prevention and Safety Promotion Conference 4

Aims & Hypothesis • Aims: ➢ To investigate the effectiveness of a sandwich-structured polycarbonate- aerogel faceshield in mitigating bTBI. ➢ To provide insight in the design of a facial protective gear that can potentially be useful to military personnel. • Hypothesis: ➢ High acoustic impedance of aerogel would result in large acoustic mismatch between its neighbouring laminate layers,  reducing the amount of blast wave transmission to the head. 13th Australasian Injury Prevention and Safety Promotion Conference 5

Method Singapore, A*Star, • Different Faceshield Designs Institute of High Performing Computing (IHPC) Head Model 13th Australasian Injury Prevention and Safety Promotion Conference 6

Method • Coupled Eulerian-Lagrangian (CEL) Method ➢ Eulerian: Air ➢ Lagrangian: Head, Helmet & other solid materials. Blast waveform characteristic: Non-reflective & Free Outflow BC Friedlander’s waveform Applied Blast Loading 13th Australasian Injury Prevention and Safety Promotion Conference 7

Results & Discussion 13th Australasian Injury Prevention and Safety Promotion Conference 8

Results & Discussion 13th Australasian Injury Prevention and Safety Promotion Conference 9

Results & Discussion ➢ Sandwiched structured face shield of polycarbonate and aerogel had significantly reduced ICP.  PC exterior shell casing (structural integrity)  Aerogel (high acoustic impedance to blast wave) Tse, K. M.*, Tan, L, B., Sappinggi, M. A. B., Franklyn, M., Lee, P.V.S., Tan, V. B. C. and Lee, H. P.* (2017). The role of a composite polycarbonate- aerogel face shield in protecting the human brain from blast-induced injury: A fluid – structure interaction (FSI) study. Journal of Sandwich Structures & Materials . (In Press) Tan, L. B.*, Chew, F. S., Tse, K. M., Tan, V. B. C. and Lee, H. P. (2014). Impact of complex blast waves on the human head – a computational study. Int J Numer Method Biomed Eng , 30 (12): pp. 1476-1505. 13th Australasian Injury Prevention and Safety Promotion Conference 10

Acknowledgement • National University of Singapore (NUS) ➢ Prof. Heow Pueh Lee ➢ Prof. Vincent Beng Chye Tan ➢ Dr. Long Bin Tan • The University of Melbourne ➢ Prof Peter Vee Sin Lee ➢ Dr. Melanie Franklyn 13th Australasian Injury Prevention and Safety Promotion Conference 11

Ballistic Threat Blast Threat Sports-related TBI Gas Gun Applied Blast Loading Tse’s Computer Head Model Kwong Ming TSE tsekm.research@yahoo.com 13th Australasian Injury Prevention and Safety Promotion Conference

The End PhD, National University of Singapore (2014) Citations: 284 h-index: 8 i10-index: 7 Email: tsekm.research@yahoo.com Google Scholar: http://scholar.google.com.sg/citations?user=EMERS88AAAAJ&hl=en Researcher ID: http://www.researcherid.com/rid/D-8669-2011 ORCID: http://orcid.org/0000-0002-8170-0775 13th Australasian Injury Prevention and Safety Promotion Conference 13