Abstract: Devices, systems, and methods for shock absorption are provided herein. Collapsible shock absorption devices have an inner wall having at least one orifice, an outer wall, and a fluid sealed within the outer wall can mitigate sharp increases in force during loading and can better distribute loading forces. In some cases, collapsible shock absorption devices disclosed herein are used for prevention of injury to a biological tissue of a subject or damage to an inanimate object.

Abstract: A protective impact device is provided that produces an approximately constant force during compression. The device distinguishes several structural features. First, the cross-sectional area in between two impact surfaces increases over the stroke distance when compression takes place. Second, a compressible fluid containing vessel, held in between two impact surfaces, defines an outer shape with a positive second derivative slope defined from one impact surface towards the other impact surface. Third, orifices allow the fluid to bleed out from the compressible vessel when an impact force causes compression of the protective impact device. The resulting approximately constant force scales more or less linearly with impact energy, regardless of impact velocity caused by the impact force. Applications include athletic equipment, automotive bumpers, aircraft landing gear, and any other application that would benefit from maximum energy absorption during an impact.

Abstract: Devices, systems, and methods for shock absorption are provided herein. Collapsible shock absorption devices have an inner wall having at least one orifice, an outer wall, and a fluid sealed within the outer wall can mitigate sharp increases in force during loading and can better distribute loading forces. In some cases, collapsible shock absorption devices disclosed herein are used for prevention of injury to a biological tissue of a subject or damage to an inanimate object.

Abstract: Systems, methods and devices for detecting a concussive event are provided. A computational classifier may be trained and utilized for detecting a concussive event in real-time. Head kinematics can be measured and a head kinematic metric determined, which can be utilized within the classifier to detect a concussive event.

Abstract: A protective impact device is provided that produces an approximately constant force during compression. The device distinguishes several structural features. First, the cross-sectional area in between two impact surfaces increases over the stroke distance when compression takes place. Second, a compressible fluid containing vessel, held in between two impact surfaces, defines an outer shape with a positive second derivative slope defined from one impact surface towards the other impact surface. Third, orifices allow the fluid to bleed out from the compressible vessel when an impact force causes compression of the protective impact device. The resulting approximately constant force scales more or less linearly with impact energy, regardless of impact velocity caused by the impact force. Applications include athletic equipment, automotive bumpers, aircraft landing gear, and any other application that would benefit from maximum energy absorption during an impact.