Head Restraint for Race Car Drivers

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Presentation transcript:

Head Restraint for Race Car Drivers Aim Jirut and Asif Lala Advised by: Drs. Paul King and Jackson Roberts

Background 13 out of 202-- 1998 Indy Car Major Deceleration Crashes were Front Impact Collisions. Peak Decelerations Ranged from 20 to 110 Gs --note: these crashes were during racing Those with Peak Decelerations of greater than 40 Gs suffered concussions. From Melvin et al

Biomechanics of the Problem Parameters (Max) Weight of Head: 8.2% Body Weight = 13lbs or 5.9 kg Weight of Helmet: 3 lbs or 1.4 kg Maximum Speed of Race Car: 230mph or 103 m/s Time of Duration of Impact: 0.04s

Biomechanics (cont.) F=ma F= (1.4 + 5.9)kg * (103m/s) 0.04s F = 7.3 kg * 2575 m/s2 <= 262 Gs F = 18,797 N or 4,226 lbf

Importance F = 18,797 N From Nahum and Smith

Project Idea Shock Absorbing Lanyard Attached from Helmet to Row Bar From www.buckinghammfg.com

Role of the Lanyard Parameters using Lanyard Force Needed to Initiate Tearing = 600 lbf (x2) = 5338 N Weight of Head: 8.2% Body Weight = 13lbs or 5.9 kg Weight of Helmet: 3 lbs or 1.4 kg Maximum Speed of Race Car: 230mph or 103 m/s Time of Duration of Impact: 0.04s

Force Calculation F=ma 5338 N = (1.4 + 5.9)kg * a a = 731 m/s2 Therefore, v = 731 m/s2 * 0.04 s v= 29.2 m/s = 65 mph

Lanyard Importance F= 5,338 N From Nahum and Smith

Past Work Calculated Initial Force Equations Completed an Economic Analysis ($300) - Helmet ~ $150 - Lanyard (x2) ~ $60 each - Easy Release Mechanism ~ $30 Proposed Project Design

Current Lanyard Awaiting Schematics and Parameters of the Different Lanyards. Calculate Remaining Force Equations ex) max tension of lanyard, exerted force due to destruction of material Find an Easy Escape Mechanism

Future Work (thru March) Sketch Schematics of the Project Design Order Helmet and Lanyard Build Prototype

Final Remarks Please visit our website at -password protection works!! http://vubme.vuse.vanderbilt.edu/group11_99/ -password protection works!! For further reference: Twentieth and 42nd Stapp Car Crash Conference Notes