Abstract This work is set in the context of blast mitigation based on geometric means, namely perforated metallic plates or grids. When a shock wave passes through plate, flow field modified, and new waves are created, as well regions vortices turbulence which energy can be dissipated. In this study, an explosive driven tube (EDST) was used to visualize interaction with piece cast foam. Additio...

This paper presents a novel experimental methodology for the study of dynamic deformation of structures under underwater impulsive loading. The experimental setup simulates fluid–structure interactions (FSI) encountered in various applications of interest. To generate impulsive loading similar to blast, a specially designed flyer plate impact experiment was designed and implemented. The design ...

Blast simulators are capable of applying blast-like loading to components in a safe and controlled laboratory environment, overcoming the inherent shortcomings blast testing terms data acquisition, test cycle time, cost. In this paper, reasonable assumptions refinements made shape impact module, key component simulator, achieve diversity simulated loading. By designing four rubber shapes, impor...

PURPOSE the objective of this study was to characterize the biomechanical effects of step rate modification during running on the hip, knee, and ankle joints so as to evaluate a potential strategy to reduce lower extremity loading and risk for injury. METHODS three-dimensional kinematics and kinetics were recorded from 45 healthy recreational runners during treadmill running at constant speed...

Two series of experiments are performed to investigate the dynamic response of various essential components of a class of sandwich structures, under high-rate inertial loads. One consists of dynamic inertia tests and the other involves dynamic impact tests. A split Hopkinson bar apparatus is modified and used for these experiments. First, the energy-absorbing characteristics of the plate materi...

The goal of this study was to develop a motion-based injury criterion for brain injuries derived from the material response of the brain tissue, under the assumption that impact response of the brain tissue can be characterized by a standard linear solid. Focus was given to brain injuries that are deemed to correlate with the strain of the brain tissue, including subarachnoid hemorrhage, intrac...

BACKGROUND Osteochondral autografts and allografts require mechanical force for proper graft placement into the defect site; however, impaction compromises the tissue. This study aimed to determine the effect of impaction force and number of hits to seat the graft on cartilage integrity. HYPOTHESIS Under constant impulse conditions, higher impaction load magnitudes are more detrimental to cel...