Analysis of Reclined Posture ATD and PMHS Pelvis-Lumbar Spine Component Tests under Vertical Impact
Abstract
The experimental design and protocols used in the study showed the feasibility of conducting anthropomorphic test device (ATD) and postmortem human surrogate (PMHS) tests in reclined postures. The tested Generation (Gen)-I version of the Warrior Injury Assessment Manikin (WIAMan) ATD appears to be suitable to evaluate the performance in under-body blast loading under different postures: nominal to recline, potentially reflecting future seat and vehicle designs in the military. The biomechanical responses analyzed from the PMHS data showed that injuries parallel nominal postures and spinal loads can be determined. Mechanical responses from the ATD data demonstrated that component-based contributions of axial and shear forces and bending moments depend on the postural angulation. In this analysis study, the shear factor was used as a biomechanical metric for quantifying the responses of the pelvislumbar spine of the Gen-1 ATD because it accommodated both the axial and shear forces in the time domain. Recognizing that the shear factor did not significantly change with different reclined postures considered in this test series, the current injury assessment reference curves developed for the nominal posture may also be applicable to reclined postures with this ATD.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 20, 2022
- Accession Number
- AD1180902
Entities
People
- David Barnes
- Frank A. Pintar
- Jamie Baisden
- Jason Moore
- John Humm
- Kathryn Loftis
- Michael Wassick
- Narayan Yoganandan
Organizations
- Medical College of Wisconsin