Improvement of windshield model for analysis of pedestrian head impact during bus collision

Name: Jirawan Prasongngen.

keyword: Windshield

LCSH: Flake-glass laminates.

; Head-to-windshield impact.

LCSH: Finite element method.

; Crack Propagation.

LCSH: Numerical analysis.

Abstract: The automotive windshield, with which pedestrians come into frequent contact during car accidents, has been identified as one of the main sources for severe pedestrian head injuries. Finite element simulation of head-to-windshield is widely used for the design and evaluation of car safety performance. Most of the windshield models used in the simulations for pedestrian head injury studies are simplified model. However, accurate modelling of windshield mechanical behavior is necessary for good prediction of head injury during car-to-pedestrian collision. The purpose of project is to improve the model of automobile windshield for simulation of the collision between a pedestrian and a vehicle. The laminated glass windshields of various thickness were tested according to UNECE R43. The deformation and crack pattern were recorded for validation of the finite element model. The finite element models of two layers and three layers laminate glass were developed. Element deletion method and share node techniques were employed for crack propagation pattern. Appropriate mesh size and shaped were obtained. The simulation results were compared with the experimental results of ball drop tests. The simulation results of the laminated glass model with two layers, 1mm-triangle mesh shows good agreement with the experimental results. This laminated glass model was then implemented to the windshield of the car. Simulation of headform impact tests according to the EEVC protocol on pedestrian protection were performed. The results in terms of head deceleration and crack pattern were compared with the test results. Moreover, the laminated glass modeling technique was used for develop the bus front-end model for pedestrian crash simulation. The simulation of headform impact on the bus windshield was conducted for assessment of pedestrian safety performance in term of head collision. Afterwards, the Hybrid III pedestrian dummy implemented for pedestrian collision simulation to observed the injury. The head injury was analyzed based on the value of head impact criteria (HIC).

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Name: Julaluk Carmai

Role: Thesis Advisors.

Email : jcm@kmutnb.ac.th

Name: Saiprasit Koetniyom

Role: Thesis Advisors.

Email : saiprasit.k.ae@tggs-bangkok.org

Created: 2018

Modified: 2020-10-02

Issued: 2020-09-15

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Master of Engineering

Level: Master's Degree

Grantor: King Mongkut's University of Technology North Bangkok

Descipline: Mechanical and Automotive Engineering (International Program)

©copyrights King Mongkut's University of Technology North Bangkok

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