Crash test – sitting passenger
This project was done in collaboration with Borcad cz, s.r.o.
The main objective of this project is to verify new design of train passenger seat in term of safety defined by national standards and directions. In those standards safety criteria for different body parts are defined. Numerical simulation could provide valuable insight during the design phase of product development and could be used for design optimization rather than physical test which are very expensive. Commercial FE explicit solver LS-DYNA was used to carry out all simulations.
The load of the individual parts of the human body during impact is assessed by the biomechanical criteria computed according to the GM/RT2100, Iss. 5. For the purpose of computing the biomechanical criteria from the experimental measurements, the software named “Computational Applications for Assessment of Injury Criteria from a Laboratory Crash Test of a Railway Two Seat According to Standard GM/RT2100, Iss. 5” were developed. Two computer software named “Computational Applications for Assessment of Injury Criteria from Crash Test Simulation with LSTC Hybrid III 50th Fast According to Standard GM/RT2100, Iss. 5”, “Computational Applications for Assessment of Injury Criteria from Crash Test Simulation with NCAC Hybrid III 50th According to Standard GM/RT2100, Iss. 5” were developed to calculate biomechanical criteria from computer simulations for a rigid and a flexible dummy.
Within a diploma thesis, the software Computational Application for Assessment of the Strength Effects of the Two-Point Seat Belt at Anchor Points according to the SAE AS 8049C Standard was also created for a design of aircraft seats.
The software was developed in collaboration with railway seat manufacturers and projects: HPC for Extensive Mechanical Computing (SP2016/176) and the National Programme of Sustainability (NPU II) project „IT4Innovations excellence in science – LQ1602“. Commercial use of the software is under the acquisition of the license. The non-commercial use of the software is only possible within the framework of the students’ education at VŠB-TU Ostrava.
The selected biomechanical criteria are shown in the figures below, which are calculated by developed software. Following injury criteria are computed by the software:
- HEADS: Head Injury Criterion (HIC); Time dependence of the head acceleration
- PELVIC: Time dependence of the pelvic acceleration
- CHEST: Time dependence of the chest acceleration, displacement; VC chest criterion
- FEMUR: Time dependence of the forces in the left and right femur
- NECK: Time dependence of the shear X, Z; Time dependence of the compression/tensile force on the neck; Time dependence of the torque Y component on the neck; Nij neck criteria
- TIBIAL: Time dependence of the TILL, TIRL, TILU and TIRU indices