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

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

Investigation of tensile and flexural behavior of biaxial and rib 1 × 1 weft-knitted composite using experimental tests and multi-scale finite element modeling

2019 ◽  
Vol 53 (23) ◽  
pp. 3201-3215 ◽  
Author(s):  
Reza Hessami ◽  
Aliasghar Alamdar Yazdi ◽  
Abbas Mazidi
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Experimental Results ◽  
Flexural Behavior ◽  
Bending Tests ◽  
Three Point Bending ◽  
Element Modeling ◽  
Multi Scale ◽  
Scale Modeling ◽  
Composite Samples

In this study, tensile and flexural behavior of biaxial and rib weft-knitted composite is obtained numerically and experimentally. Multi-scale finite element modeling is employed to simulate the tensile and flexural behavior of composite samples. In the finite element modeling, the geometry of a unit cell of each fabric is initially modeled in ABAQUS software, and then periodic boundary conditions were applied to a unit cell. The stiffness matrix for each structure was obtained by a python code via meso scale modeling and used as input data for the macro modeling. To validate the numerical model, two types of weft-knitted fabrics (rib 1 × 1 and biaxial fabrics) are produced by a flat weft knitting machine. Epoxy resin is used to construct composite by the vacuum injection process (VIP). After that, the tensile and three-point bending tests were applied to composite samples. The experimental results showed that tensile strength and tensile modulus of biaxial composites are greater than rib composites, in both wale and course directions. Moreover, in three-point bending test, biaxial composite showed more strength and more stiffness in comparison to rib composite. Finite element results were compared to experimental results in tensile and bending tests. The results showed that good agreement with experimental results in the linear section of tensile and flexural behavior of composites. Consequently, the current multi-scale modeling can be used to predict the stiffness matrix and mechanical behavior of complex composite structures such as knitted composites.

Finite element modeling of soft tissues: Material models, tissue interaction and challenges

2014 ◽  
Vol 29 (4) ◽  
pp. 363-372 ◽  
Author(s):  
Maren Freutel ◽  
Hendrik Schmidt ◽  
Lutz Dürselen ◽  
Anita Ignatius ◽  
Fabio Galbusera
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Soft Tissues ◽  
Material Models ◽  
Element Modeling ◽  
Tissue Interaction

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.

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