Finite Element Modeling of the Complex Anisotropic Mechanical Behavior of the Human Sclera and Pia Mater

2022 ◽  
pp. 106618
Author(s):  
Alireza Karimi ◽  
Seyed Mohammadali Rahmati ◽  
Reza Razaghi ◽  
Christopher A. Girkin ◽  
J. Crawford Downs
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Mechanical Behavior ◽  
Pia Mater ◽  
Element Modeling

Analyzing the mechanical behavior of thin films using nanoindentation, cantilever microbeam deflection, and finite element modeling

2004 ◽  
Vol 19 (1) ◽  
pp. 315-324 ◽  
Author(s):  
R. Schwaiger ◽  
O. Kraft
Keyword(s):  
Finite Element ◽  
Yield Strength ◽  
Finite Element Modeling ◽  
Mechanical Behavior ◽  
Bulk Material ◽  
Cu Films ◽  
Element Modeling ◽  
Microtensile Testing ◽  
Hardening Modulus ◽  
Cantilever Microbeam

A comprehensive study was undertaken to identify the extent to which the mechanical properties of thin metal films on substrates could be determined quantitatively from instrumented sharp indentation. The mechanical behavior of thin Cu films on substrates was investigated using three different methods: nanoindentation, cantilever microbeam deflection, and microtensile testing. Finite element calculations of the nanoindentation and microbeam deflection experiments were conducted to extract yield strength and hardening modulus. Systematic experiments were performed to investigate the consistency of the different experimental techniques. The mechanical behavior of the Cu films was observed to depend on the film thickness. However, the results from finite element modeling of nanoindentation and microbeam deflection are quite different. In both cases, unique solutions for yield strength and hardening modulus were found. This is particularly noteworthy for the nanoindentation experiments; it is argued that the substrate destroys the self-similarity that is present during indentation of bulk material using a Berkovich tip. Microbeam deflection experiments seem to be more sensitive to the elastic–plastic transition, whereas the nanoindentation results describe the mechanical behavior at larger plastic strains. This is corroborated by microtensile tests.

Piston Finite Element Modeling for the Estimation of Hydrodynamic and Contact Forces and Moments

2006 ◽  
Author(s):  
Andreas P. Panayi ◽  
Harold J. Schock
Keyword(s):  
Finite Element ◽  
Internal Combustion Engine ◽  
Finite Element Modeling ◽  
Mechanical Behavior ◽  
Combustion Engine ◽  
Contact Forces ◽  
Element Modeling ◽  
Modeling Simulation ◽  
Finite Element Modeling Simulation ◽  
Cylinder Bore

Modeling the thermal and mechanical behavior of a piston is crucial, as it allows for the evaluation of piston performance including piston dynamics and friction. These characteristics directly affect the efficiency, reliability, and lifespan of an internal combustion engine. This work migrates from the conventional parameterized piston modeling approach and uses a full CAD finite element modeling simulation for the evaluation of the piston’s thermal and mechanical behavior as well as the resultant hydrodynamic and contact forces and moments experienced by it. The analysis is performed for two different piston to cylinder bore nominal clearances, and for one of them at two different engine speeds, while assuming the piston is moving at the center of the cylinder bore with no transverse or tilting motion.

scholarly journals Nano finite element modeling of the mechanical behavior of biocomposites using multi-scale (virtual internal bond) material models

2007 ◽  
Vol 83A (2) ◽  
pp. 332-344 ◽  
Author(s):  
Ganesh Thiagarajan ◽  
Kavita Deshmukh ◽  
Yong Wang ◽  
A. Misra ◽  
J. Lawrence Katz ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Mechanical Behavior ◽  
Internal Bond ◽  
Material Models ◽  
Element Modeling ◽  
Multi Scale
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