Total Human Model for Safety

What is THUMS?

Total Human Model for Safety (THUMS) is a human FE model jointly developed by Toyota Motor Corporation and Toyota Central R&D Labs., Inc. The model aims to simulate human body kinematics and injury responses in car crashes.The geometries of the human body parts are represented by FE meshes. Their material properties refer the list in papers or documents and are compared with component tests listed in papers or documents for validation.

There are versions and variations in THUMS.

Two postures are considered in modeling ;

THUMS AM50%ile model (THUMS AM50)

Model description ;

Version 4 Occupant Models ;

Version 4 Pedestrian Models ;

Model detail

Version 4 aims to simulate not only head injuries and bone fracture but also internal organ injuries.
High-resolution CT scans were used to accurately represent the human body geometry and the internal organs. It is possible
to simulate injury at a tissue level.

Applications

Pedestrian Impact Simulation ;
A pedestrian impact simulation was conducted using the THUMS Version 4 pedestrian model.
The model simulated a case where a pedestrian is impacted by a SUV from its left side at a speed of 40 km/h.

Frontal Impact Simulation ;
A frontal collision simulation was conducted using the THUMS Version 4 occupant model.
The model simulated a case where a mid-size sedan car collided to a rigid wall at a speed of 55 km/h.