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Users' Conference

The 2018 THUMS USA Users' Meeting

JSOL is delighted to announce The 2018 THUMS USA Users' Meeting.
THUMS, the Total Human Model for Safety for use with LS-DYNA® is being rapidly adopted by users worldwide.
We invite you to join us and share in THUMS technical information.


Title: The 2018 THUMS USA Users' Meeting
Dates: June 13th(Wed), 2018
  • THUMS users.
  • Customers who are interested in THUMS.
Venue: Edward Hotel & Convention Center - Dearborn, MI
600 Town Center Drive Dearborn, Michigan 48126 United States of America [map]
Expected number of participants: 50
Registration Fee: Free
Organizer: JSOL Corporation


10:30 - 10:35
10:35 - 11:20
Study of motorcyclist's kinematics and injury mechanisms using THUMS Version4
Dr. Tsuyoshi Yasuki
Toyota Motor Corporation
The number of traffic accident fatalities of motorcycle passengers in the ASEAN countries has increased in the past 10 years. In the regulations and NCAP, the crash test protocol of the motorcycle passenger is not yet established and it is necessary to clarify the behavior of the occupant and the mechanism of the injury occurrence. In this study, we investigated the relationship between behavior of injury mechanism and crash condition of automobile and motorcycle crash, in computational simulation with human body FE model THUMS developed by Toyota and Toyota Central R&D Labs. When the collision speed of the automobile is over 40 km / h, if the head collides with the A pillar and the roof side rail, the risk of head injury tends to increase. In addition, the trajectory of the head tended to depend on the inertial force of the head while the head collided with the automobile after motorcycle collided with automobile. These results suggest that reducing collision speed by introducing speed regulation and automatic braking would be effective for reducing injury risk.
11:20 - 11:50
Developing and validating individualized human body models by morphing THUMS
Dr. Jingwen Hu
University of Michigan
Among the whole population, small female, obese, and/or older occupants are at increased risk of death and serious injury in motor-vehicle crashes compared with mid-size young men. FE human models have advanced significantly for the past decade as an important tool for injury assessment, but up until recently they only represented occupants approximately the same size and shape as the available crash test dummies (i.e. small female, midsize male, and large male). These models do not account for the morphological variations in skeleton and external body shape outside of the three anthropometric categories. For the past few years, we have been gathering data and developing methods to enable a major change in how FE human models are developed and used. To date, we have developed an approach to parametric FE human modeling that allows the size and shape of a baseline FE human model to be rapidly varied based on age, sex, stature, BMI, or other anthropometric variables. In this presentation, the general methodology of parametric human modeling based on THUMS v4 will be introduced. Subject-specific model validation against cadaver impact tests will also be presented. The parametric human models can help future safety designs for occupants with a wide range of stature and body shape, which cannot be considered with current human models.
11:50 - 13:00
13:00 - 13:45
THUMS Modeling to Assess Dynamic Vertebral Strength Changes Pre- vs Post-Spaceflight on Long-Duration ISS Missions
Mr.Kyle McNamara
Wake Forest School of Medicine
Prolonged exposure of astronauts to microgravity during long-duration spaceflight can degrade the musculoskeletal system, increasing the risk of structural failure of these tissues when they experience dynamic loads. Quantitative computed tomography (qCT) can measure changes in bone morphology, volumetric bone mineral density (vBMD), and cortical thickness as a means to quantify skeletal degradation from prolonged spaceflight. Magnetic resonance imaging (MRI) can measure volumetric changes in spinal musculature occurring as a result of prolonged spaceflight. These musculoskeletal measurements derived from qCT and MRI pre- and post-flight crewmember scans are integrated and applied in our dynamic THUMS simulations to quantify vertebral strength changes during spaceflight.
13:45 - 14:30
THUMS Application for comfort analysis with J-SEATdesigner
Dr. Noriyo Ichinose
JSOL Corporation
J-SEATdesigner, developed by JSOL Corp., is integrated seat design system for LS-DYNA and provides seat design related features for automatic model setup, FE base dummy positioning and detailed seat modeling. Thanks to the detailed modeling of THUMS, THUMS can be used for not only crush analysis but also comfort analysis. Latest version of J-SEATdesigner supports automatic model setup for comfortability evaluation. In this presentation, new features for advanced seat modeling and comfort analysis setup in J-SEATdesigner will be introduced and some case studies for comfort analysis will be shown. this presentation shows pressure distribution with detailed seat model and random vibration analysis by explicit solver as case studies of comfortability evaluation. In addition to above, new THUMS positioning feature that supports spine angle prediction to change torso angle and head position will be presented.
( from Website )


Users Meeting Secretariat
JSOL Corporation, Engineering Technology Division


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