Modeling Study for the Design of an Innovative Composite Membrane Inflation Test

2011 ◽  
Author(s):  
Kimberly A. Ziegler ◽  
Ravi Yatnalkar ◽  
K. T. Ramesh ◽  
Thao D. Nguyen
Keyword(s):  
Dynamic Loading ◽  
Test Data ◽  
Composite Membrane ◽  
Mechanical Response ◽  
Rate Dependence ◽  
Blast Injuries ◽  
Dynamic Membrane ◽  
Physiological Range ◽  
Dynamic Loading Conditions ◽  
Membrane Inflation

The focus of this study is to develop a dynamic membrane inflation test to characterize the mechanical response of human corneal and scleral tissues at high rates representative of blast conditions and to model the dynamic loading conditions experienced in ocular blast injuries. Previous studies investigate the quasistatic inflation response of these tissues at pressures in the physiological range (Anderson et al. 2004, Burnstein et al. 1995, Myers et al. 2010, Voorhies 2003). Test data reveals considerable rate-dependence, as both tissues exhibit greater stiffening effects at higher rates.

scholarly journals How the Thermomechanical Processing Can Modify the High Strain Rate Mechanical Response of a Microalloyed Steel

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6062
Author(s):  
Remigiusz Błoniarz ◽  
Janusz Majta ◽  
Bogdan Rutkowski ◽  
Grzegorz Korpała ◽  
Ulrich Prahl ◽  
...  
Keyword(s):  
Dynamic Loading ◽  
Mechanical Response ◽  
Split Hopkinson Pressure Bar ◽  
Thermomechanical Processing ◽  
Microstructural Analysis ◽  
Image Correlation ◽  
Microalloyed Steels ◽  
Loading Conditions ◽  
Hopkinson Pressure Bar ◽  
Dynamic Loading Conditions

The effects of thermomechanical processing (TMP) on the mechanical response of microalloyed steels subjected to dynamic loading conditions were examined. The deformation conditions in the thermomechanical laboratory rolling processes were selected on the basis of dilatometric tests. It allowed (with a constant value of total deformation) us to obtain microstructures with different compositions and morphology of the particular components. Several samples characterized by a particularly complex and unexpected representation of the obtained microstructures were selected for further research. Plastometric tests, i.e., compression and tensile tests, were performed under quasi-static loading with digital image correlation (DIC) analysis, and under dynamic loading on the Split Hopkinson Pressure Bar (SHPB) apparatus with strain rates of 1400 and 2000 s−1. Samples deformed in such conditions were subjected to microstructural analysis and hardness measurements. It has been observed that the use of various combinations of TMP parameters can result in the formation of specific microstructures, which in turn are the source of an attractive mechanical response under dynamic loading conditions. This opens up new possible areas of application for such popular structural materials which are microalloyed steels.

Development and Verification of a Dynamic TKR Model

2002 ◽  
Author(s):  
Jason P. Halloran ◽  
Anthony J. Petrella ◽  
Paul J. Rullkoetter
Keyword(s):  
Finite Element ◽  
Contact Mechanics ◽  
Dynamic Loading ◽  
Soft Tissues ◽  
Dynamic Models ◽  
Total Joint Replacement ◽  
Fe Model ◽  
Loading Conditions ◽  
Dynamic Loading Conditions

The success of current total knee replacement (TKR) devices is contingent on the kinematics and contact mechanics during in vivo activity. Indicators of potential clinical performance of total joint replacement devices include contact stress and area due to articulations, and tibio-femoral and patello-femoral kinematics. An effective way of evaluating these parameters during the design phase or before clinical use is via computationally efficient computer models. Previous finite element (FE) knee models have generally been used to determine contact stresses and/or areas during static or quasi-static loading conditions. The majority of knee models intended to predict relative kinematics have not been able to determine contact mechanics simultaneously. Recently, however, explicit dynamic finite element methods have been used to develop dynamic models of TKR able to efficiently determine joint and contact mechanics during dynamic loading conditions [1,2]. The objective of this research was to develop and validate an explicit FE model of a TKR which includes tibio-femoral and patello-femoral articulations and surrounding soft tissues. The six degree-of-freedom kinematics, kinetics and polyethylene contact mechanics during dynamic loading conditions were then predicted during gait simulation.

The mechanical response of commercially available bone simulants for quasi-static and dynamic loading

2019 ◽  
Vol 90 ◽  
pp. 404-416 ◽  
Author(s):  
A.D. Brown ◽  
J.B. Walters ◽  
Y.X. Zhang ◽  
M. Saadatfar ◽  
J.P. Escobedo-Diaz ◽  
...  
Keyword(s):  
Dynamic Loading ◽  
Mechanical Response ◽  
Static And Dynamic Loading
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