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Human Shoulder Response to Lateral Impact in Intermediate Loading Conditions Between High-Velocity, Short-Duration and Low-Velocity, Long-Duration

CEESAR (Nanterre, France)-Matthieu Lebarbé, Pascal Potier, Jérôme Uriot, Pascal Baudrit
DGA TT (Bourges, France)-Denis Lafont
Published 2018-11-12 by The Stapp Association in United States
The EuroSID-2re (ES-2re) Anthropomorphic Test Device (ATD) commonly known as the crash test dummy is also used in the military domain to assess the risk of injury of armored vehicles occupants from lateral impact. The loading conditions range from low velocity - long duration impacts (4 m/s - 50 ms) similar to the automotive domain, to high velocity - short duration impacts (28 m/s - 3 ms) corresponding to cases where the panel deforms under an explosion. The human shoulder response to lateral impact was investigated at bounds of the loading condition spectrum previously mentioned, and also at intermediate conditions (14 m/s - 9 ms) in previous studies. The aim of the current study is to provide additional insight at the intermediate loading conditions which are not found in the literature.Eight pure lateral shoulder impact tests were performed on Post Mortem Human Subjects (PMHS) using an 8.1 kg rigid impactor at velocities ranging from 3.3 m/s to 8.8 m/s with the duration ranging from 25 ms to 35 ms. The PMHS were instrumented with accelerometers…
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Human Shoulder Response to High Velocity Lateral Impact

CEESAR, Nanterre, France-Matthieu Lebarbé
DGA TT, Bourges, France-Denis Lafont
Published 2017-11-13 by The Stapp Association in United States
The armies of the North Atlantic Treaty Organization need a shoulder injury criterion for the EuroSID-2re dummy that must be reliable over a large range of loading conditions, from high velocity, short duration impacts (28 m/s - 3 ms) to low velocity long, duration impacts (4 m/s - 50 ms). In the literature, the human shoulder response to lateral impact was investigated at bounds of the loading condition spectrum as previously mentioned. For the low velocities, the injuries were mainly clavicle fractures and the maximum compression between the acromion and the sternum (Cmax) was proposed as an injury criterion. For the high velocities, the typical injury was humerus fractures, including a crushed humeral head.The present study investigates the human shoulder response at an intermediate loading condition (14 m/s - 9 ms). Six lateral shoulder impact tests have been performed with three Post Mortem Human Subjects using a rigid impactor. The duration of the impact was controlled by means of an aluminum honeycomb that decelerated the impactor during the impact.The shoulder external deflection (impactor-to-sternum) ranged between…