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Structure Total Human Model for Safety THUMS

THUMS Functions

THUMS Functions

Versions and Variations of THUMS

THUMS has had four major updates since the start of its development in 1997. In Version 4, it possible to consider bone fractures and internal organ damage along with the head and brain injury. The human body geometry and internal organ meshes, based on detailed CT scans, allow for simulating injury and predicting the level of damage to the human body.

In Version 4.01, THUMS AM50 is enhanced with the addition of the brain model and the inclusion of the gravitational effects. In 4.02, the number of head elements was increased fourfold and the robustness was improved.

In June 2015, THUMS Version 5 was released with the addition of a muscle model. Version 5 allows for simulating the braced posture of a passenger in the vehicle to achieve more realistic crash conditions when validating the advantages of safety equipment including PCS (Pre-Collision System).

THUMS lineup

  • Occupant Models
    Occupant Models
    This posture is for the occupant safety simulation. THUMS includes three body types. AM50 is a 50th percentile male model for a male adult in standard proportion. AF05 is a 5th percentile female model for a short female adult. AM95 is a 95th percentile male model for a large male adult.
  • Pedestrian Models
    Pedestrian Models
    Posture for simulation of pedestrian safety. THUMS includes three body types. AM50 is the 50th percentile male model for a male adult with standard proportions. AF05 is the 5th percentile female model based on a short female adult. AM95 is the 95th percentile male model based on a large male adult.

Functions

  • Brain
    Brain
    Accurately represents the white matter, gray matter, membranous coverings, epitheliums, skull bones, eyeballs, teeth, and jawbone.
  • Organs
    Organs
    Detailed models of the following major organs are included: the heart, liver, kidney, pancreas, esophagus, stomach, small intestine, large intestine, lung, trachea, artery, diaphragm, and major psoas muscle.
  • Arms
    Arms
    Detailed models of the following parts of the arm are included: elbow bone, radial bone, arm bone, forearm muscle, and brachial muscle.
  • Upper leg
    Upper leg
    Accurately represents the thighbone and muscles.
  • Lower leg
    Lower leg
    Accurately represents the tibiae, fibulae, dermal bones, bone trabeculae, and muscles.
  • Inclusion of gravitational effects
    Inclusion of gravitational effects
    In AM50 Version 4.02, the occupant model was enhanced with the inclusion of gravitational effects.
  • Inner organs with gravitational effects
    Inner organs with gravitational effects
    In AM50 Version 4.02, the geometries and meshes for inner organs were enhanced, along with the inclusion of the gravitational effects, for the occupant model.
  • Neck Model
    Neck Model
    In Version 4.02, AM50 is enhanced with a modification of the beam element that represents the neck muscles.
  • Head Model
    Head Model
    In AM50 Version 4.02, the material properties of the head have been changed.
  • Brain model
    Brain model
    In AM50 Version 4.02, various new parts were added to achieve a more accurate representation. Changes made to the material models and their properties. Enhanced with a finer mesh to improve the accuracy and robustness of the calculation.
  • Muscle Model
    Muscle Model
    The muscle model is designed for building an occupant model in the braced posture, with a pre-crash posture change. Users can examine the effects of safety equipment, seatbelts, and airbags in more realistic conditions. Predictive simulation of pre-crash safety (PCS) is also possible. (Version 5)

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