Design and analysis of lateral protection guards for trucks to prevent underride accidents

Abstract

When A Car Is Colliding On A Truck, The Severity Of A Passenger Car Occupant Collision Is Often High Due To Various Incompatibilities. First, The Kinetic Energy Of The Truck Is Much Higher Than That Of A Single-Vehicle Due To The Large Weight Difference. The Second Incompatibility Is Geometric Because Of The Different Sizes And Dimensions. If The Front Deformable Zone Of The Car Does Not Properly Hit The Bumper Of The Truck, The Energy Absorption Due To The Front Deformation Of The Car Will Be Reduced. To Reduce Such Kinds Of Accidents Side Guards Or Panels Are Installed Between The Wheels Of The Truck That Help Prevent People From Being PulledUnder The Large Vehicle During A Side Impact. These Guards Are Beneficial For Stopping Unprotected Road Users From Passing Under The Vehicles And Preventing Them From Getting Caught Under The Wheels, But Their Strength Is Low And Collapsed When They Are Hit Hard, Or Just On One Side And Also It Creates The Wedge Effect. Because Of This, It Is Beneficial To Implement A New Design To Overcome All Of The Problems Mentioned Problems. This Study Work Aimed To Improve The Existing Sups By Structural Configuration Obtained From The Design Concept Of Roadside Roller Type Guard Rail System, In Which The Device Deflects Cars During Offset Collisions. Deferent Angle Of Impact Is Considered For Collision Analysis Of Bullet Vehicle With Sups. The Fea Model Of Existing And Modified Sup Are Evaluated And Compared Under The Same Condition. To Accomplish And The Aim Of The Project, The Catia Software Will Be Used For Modelling, And The Dynamic Analysis Is Performed Using Ls-Dyna Explicit Commercial Finite Element Analysis Package. Energy Absorption, Stress, Impact Force And, Deformation, Are Considered As Quantitative Criteria For Crashworthiness And Strength Evaluation. The Result Of The Simulations Shows That With The Modification, A Reduction Of 104n And 140n Force Was Obtained By For 30 And 90 Degree Impact Configuration Respectively. Moreover At Each Event Of Collision The Modified Model Provides More Protection And By Providing 5% Less Intrusion That Of Existing Sup. The Strength Of The Sups Are Compared With Stress Parameter And Modified Model Create 30%, 20% And 24% Less Stress As Compared To The Existing Model For 300,600And 900Configuration Respectively. However , The Existing Model Provide 49%,21 %Less And 12% More Energy Absorption Than The Modified Sup For 300,600, And 900Impact Configuration Respectively. This Is Due To The Relative Rigidly Of The Modified Sup. Generally, It Can Be Concluded That With The Modified Model, The Strength And Crashworthiness Of The Existing SupWas Greatly Improved With Affecting The Weight. So That The Degree Of Injures Due To Under Run Accidents Can Be Reduced By Implementing Futures Recommended On This Paper.