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| Chest motion equation and injury risk of a 3-year-old child under different constrained loads |
| HAN Yong1,2,3, TANG Huicong1,3, TIAN Fengyi2,3, HUANG Hongwu1,3, Mizuno Koji4 |
1. School of Mechanical and Automobile Engineering, Xiamen University of Technology, Xiamen 361024, China；
2. State Key Lab of Vehicle NVH and Safety Technology, Chongqing 400000, China;
3. Fujian Provincial Collaborative Innovation Center for R&D of Coach and Special Vehicle, Xiamen 361024, China；
4. Department of Mechanical Science and Engineering, Nagoya University, Nagoya 464-8603, Japan |
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Abstract The kinematic response of a 3-year-old child occupant’s chest under impact loading is a blind spot of research. Based on the ECE R44 front collision test regulation, two types of CRSs’ front collision numerical analysis models were established using the hybrid III 3-year-old child dummy and the total human model for safety 3YO (THUMS 3YO) occupant finite element model academic version 4. Then the chest motion equation of Hybrid III 3-year-old child dummy was built to analyze relations among chest acceleration and internal and external forces exerted on chest. Injury risks of THUMS 3YO child’s chest soft tissue organ in two types of CRSs were contrastively analyzed. The analysis results showed that hybrid III 3-year-old child dummy’s chest acceleration is related to external and internal forces exerted on chest, and external force is the most important influence factor on chest acceleration; THUMS 3YO child occupant chest soft tissue organ’s stress and strain both exceed the damage threshold, and the damage value in the front guard plate type CRS is larger than that in the 5-point back-belt type CRS; the study results provide an important guide for design of CRS.
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Received: 05 July 2018
Published: 28 December 2019
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