Bridging HBM Connect® and ATD Chest Metrics Using Functional Mapping for Crash Application

Authors: Chirag Shah, Tushar Arora, Gopinath Velmurugan, Pradeep Kulavi, Stephen Fu, Anurag Soni, Renuka Jagadish, Humanetics Group

Abstract

Human Body Models (HBMs) are gaining recognition by consumer agencies as tools to enhance vehicle safety by complementing traditional Anthropomorphic Test Devices (ATDs). However, integrating HBMs into product development poses challenges in aligning their injury metrics with those of ATDs. This study aims to develop chest deflection mapping functions between the HBM Connect^® 50M and two widely used ATD finite element (FE) models: THOR-50M and H3-50M. Frontal chest loading scenarios from the qualification catalogue (Euro NCAP CP 550) were simulated in LS-DYNA (Synopsys) to replicate crash conditions. Matched-pair simulations enabled comparison of chest deflections, with HBM outputs defined to replicate the IR-TRACCs of THOR-50M and sternum potentiometer of H3-50M. Peak chest deflections were used to create mapping functions, ensuring R² values above 0.9. A follow-up comparison with the mapping functions using the Gold-Standard GS2 sled test showed strong correlation with THOR-50M and moderate correlation with H3-50M simulated chest deflections values. Future work will incorporate additional sled cases to further refine and validate these mapping functions for frontal impact applications. 

Type: Short Communication

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