scholarly journals Experimental and finite element analysis of articular cartilage

2021 ◽  
Author(s):  
Abdolreza Karami
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cervical Spine ◽  
Articular Cartilage ◽  
Material Properties ◽  
Testing Machine ◽  
Published Data ◽  
Test Protocol ◽  
Element Analysis ◽  
The Finite Element Analysis

In the clinical field, articular cartilage has an important role in performance of most joints in the human body. In the present study, articular cartilage was excised from the knee joint of a bovine and tested in a tensile testing machine. The data obtained from the test was used to calculate the material properties of the cartilage. The material properites obtained from the experimental work were validated against the published experimental results in the literature. As the values from the experiment were in satisfactory agreement with the published data, it was concluded that the test protocol used in the experiment provides reliable data. Next, the material properties were implemented in finite element model of C3-C4 of cervical spine to examine if the finite element analysis can provide an accurate prediction of the behavior of the cervical spine. The stress and displacement results of the finite element analysis were consistent with the reported data in the literature. The location and the amount of the maximum stresses were examined and compared with the failure point of the materials.

scholarly journals Experimental and finite element analysis of articular cartilage

2021 ◽  
Author(s):  
Abdolreza Karami
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cervical Spine ◽  
Articular Cartilage ◽  
Material Properties ◽  
Testing Machine ◽  
Published Data ◽  
Test Protocol ◽  
Element Analysis ◽  
The Finite Element Analysis

In the clinical field, articular cartilage has an important role in performance of most joints in the human body. In the present study, articular cartilage was excised from the knee joint of a bovine and tested in a tensile testing machine. The data obtained from the test was used to calculate the material properties of the cartilage. The material properites obtained from the experimental work were validated against the published experimental results in the literature. As the values from the experiment were in satisfactory agreement with the published data, it was concluded that the test protocol used in the experiment provides reliable data. Next, the material properties were implemented in finite element model of C3-C4 of cervical spine to examine if the finite element analysis can provide an accurate prediction of the behavior of the cervical spine. The stress and displacement results of the finite element analysis were consistent with the reported data in the literature. The location and the amount of the maximum stresses were examined and compared with the failure point of the materials.

scholarly journals Finite element analysis of complete model of cervical spine

2021 ◽  
Author(s):  
Muhammad Ardalani-Farsa
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Cervical Spine ◽  
Material Properties ◽  
The Finite Element Method ◽  
Complete Model ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Hard Tissues

The finite element method has been applied in the area of the cervical spine since the 1970's. In the present research work, the finite element method was employed to model, validate and analyze a complete model of the human cervical spine from C1 to T1, including interconnecting intervertebral discs, ligaments and joints. The developed model of the cervical spine was validated by the experimental results presented in the literature. As the values obtained from the finite element analysis were mainly in the range of motion observed in the experiment; it was concluded that the finite element results were consistent with the reported data in the literature. Next, the validated model of the cervical spine was examined under physiological loading modes to locate the areas bearing maximum stress in the cervical spine. Finally, to study the effect of variations in the material properties on the output of the finite element analysis, a material property sensitivity study was conducted to the C3-T1 model of cervical spine. Changes in the material properties of the soft tissues affected the external and internal responses of both the hard and soft tissue components, while changes in those of the hard tissues only affected the internal response of hard tissues.

scholarly journals Finite element analysis of complete model of cervical spine

2021 ◽  
Author(s):  
Muhammad Ardalani-Farsa
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Cervical Spine ◽  
Material Properties ◽  
The Finite Element Method ◽  
Complete Model ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Hard Tissues

The finite element method has been applied in the area of the cervical spine since the 1970's. In the present research work, the finite element method was employed to model, validate and analyze a complete model of the human cervical spine from C1 to T1, including interconnecting intervertebral discs, ligaments and joints. The developed model of the cervical spine was validated by the experimental results presented in the literature. As the values obtained from the finite element analysis were mainly in the range of motion observed in the experiment; it was concluded that the finite element results were consistent with the reported data in the literature. Next, the validated model of the cervical spine was examined under physiological loading modes to locate the areas bearing maximum stress in the cervical spine. Finally, to study the effect of variations in the material properties on the output of the finite element analysis, a material property sensitivity study was conducted to the C3-T1 model of cervical spine. Changes in the material properties of the soft tissues affected the external and internal responses of both the hard and soft tissue components, while changes in those of the hard tissues only affected the internal response of hard tissues.

scholarly journals The Optimization of FDM 3D Printer’s Structure Based on Finite Element Analysis

2019 ◽  
Vol 257 ◽  
pp. 02004
Author(s):  
Zhenhai Huang ◽  
Tingchun Shi ◽  
Xiuyan Yue
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Material Properties ◽  
Common Type ◽  
3D Printer ◽  
Deformation Characteristics ◽  
Structure Model ◽  
Element Analysis ◽  
Vibration Model ◽  
The Finite Element Analysis

In view of the forming accuracy of the 3D printer, the paper, from the structure of the printer itself, discussed the influence on the precision of the printer via improving the structure of 3D printer. A typical 3D printer, such as a common type of FDM, was selected, and SOLIDWORKS software was used for solid modeling, after establishing the model, the finite element analysis was carried out on the whole structure model to obtain the deformation characteristics and the main vibration model of the printer. On the basis of finite element analysis, the influence of the level shaft bearing diameter, material properties and symmetry of the parts on the overall mechanical properties of the printer was discussed respectively. On this basis, the overall structure of the machine has been optimized and achieved remarkable results.

scholarly journals Finite element analysis relating shape, material properties, and dimensions of taenioglossan radular teeth with trophic specialisations in Paludomidae (Gastropoda)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Wencke Krings ◽  
Jordi Marcé-Nogué ◽  
Stanislav N. Gorb
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Material Properties ◽  
Stress And Strain ◽  
Plant Surface ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Force Volume ◽  
General Size

AbstractThe radula, a chitinous membrane with embedded tooth rows, is the molluscan autapomorphy for feeding. The morphologies, arrangements and mechanical properties of teeth can vary between taxa, which is usually interpreted as adaptation to food. In previous studies, we proposed about trophic and other functional specialisations in taenioglossan radulae from species of African paludomid gastropods. These were based on the analysis of shape, material properties, force-resistance, and the mechanical behaviour of teeth, when interacting with an obstacle. The latter was previously simulated for one species (Spekia zonata) by the finite-element-analysis (FEA) and, for more species, observed in experiments. In the here presented work we test the previous hypotheses by applying the FEA on 3D modelled radulae, with incorporated material properties, from three additional paludomid species. These species forage either on algae attached to rocks (Lavigeria grandis), covering sand (Cleopatra johnstoni), or attached to plant surface and covering sand (Bridouxia grandidieriana). Since the analysed radulae vary greatly in their general size (e.g. width) and size of teeth between species, we additionally aimed at relating the simulated stress and strain distributions with the tooth sizes by altering the force/volume. For this purpose, we also included S. zonata again in the present study. Our FEA results show that smaller radulae are more affected by stress and strain than larger ones, when each tooth is loaded with the same force. However, the results are not fully in congruence with results from the previous breaking stress experiments, indicating that besides the parameter size, more mechanisms leading to reduced stress/strain must be present in radulae.

Design Optimization and Finite Element Analysis of 3C-SiC Bio-Sensors Based on Dogbone Resonator

2014 ◽  
Vol 595 ◽  
pp. 221-227 ◽  
Author(s):  
Abid Iqbal ◽  
Faisal Mohd-Yasin ◽  
Sima Dimitrijev
Keyword(s):  
Finite Element Analysis ◽  
Silicon Carbide ◽  
Finite Element ◽  
Material Properties ◽  
Pathogen Detection ◽  
Optimized Design ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Cubic Silicon Carbide ◽  
Fea Analysis

This paper presents the optimized design and Finite Element Analysis (FEA) of a bio sensor based on cubic silicon carbide (3C-SiC) for pathogen detection. Silicon Carbide is chosen due to its excellent material properties and chemical stability compared to silicon in varying environmental conditions. The desired resonance frequency is optimized using matlab and the finite element analysis is carried out using COMSOL and Intellisuite software’s. The effect of the residual stress on the desired mode of resonant frequency and the fabrication feasibility of the proposed resonator fabrication are studied using FEA analysis. The mathematical modeling of thermally actuation and piezoresistive sensing for the design resonator bio sensors are illuminated. The close agreement between the analytical model and finite element analysis verify the design of proposed bio sensors.

Research on Fatigue Behavior of Beam with Corrugated Steel Webs

2013 ◽  
Vol 690-693 ◽  
pp. 164-167
Author(s):  
Xiao Long Hu ◽  
Lian Fei Tan ◽  
Qing Xuan Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Testing ◽  
Fatigue Behavior ◽  
Testing Machine ◽  
Element Analysis ◽  
Three Point Bending ◽  
Corrugated Webs ◽  
The Finite Element Analysis ◽  
Corrugated Steel Web

This paper present that experimental research on the fatigue behavior of beam with Q345c steel corrugated webs. There are four test specimens with different structural feature will be tested in three-point bending to load by Shinmadzu 4890 fatigue testing machine. Moreover, the finite-element analysis will be used to simulate the fatigue behavior of common beam with corrugated steel web. Weld will be our focus on importance object.

scholarly journals Finite Element Analysis Relating Shape, Material Properties, and Dimensions of Taenioglossan Radular Teeth with Trophic Specialisations in Paludomidae (Gastropoda)

2021 ◽  
Author(s):  
Wencke Krings ◽  
Jordi Marcé-Nogué ◽  
Stanislav N. Gorb
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Behaviour ◽  
Material Properties ◽  
Stress And Strain ◽  
Plant Surface ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Force Volume

Abstract The radula, a chitinous membrane with embedded tooth rows, is the molluscan autapomorphy for feeding. The morphologies, arrangements and mechanical properties of teeth can vary between taxa, which is usually interpreted as adaptation to food. In previous studies, we proposed about trophic and other functional specialisations in taenioglossan radulae from species of African paludomid gastropods. These were based on the analysis of shape, material properties, force-resistance, and the mechanical behaviour of teeth, when interacting with an obstacle, which was previously simulated for one species (Spekia) by the finite-element-analysis (FEA) and, for more species, observed in experiments. In the here presented work, we test the previous hypotheses by applying the FEA on 3D modelled radulae, with incorporated material properties, from three additional paludomid species. These species forage either on algae attached to rocks (Lavigeria), covering sand (Cleopatra), or attached to plant surface and covering sand (Bridouxia). Since the analysed radulae vary greatly in their size between species, we additionally aimed at relating the simulated stress and strain distributions with the tooth sizes by altering the force/volume. For this purpose, we also included Spekia again in the present study. Our FEA results show that smaller radulae are more affected by stress and strain than larger ones, when each tooth is loaded with the same force. However, the results are not fully in congruence with results from the previous breaking stress experiments, indicating that besides the parameter size, more mechanisms leading to reduced stress/strain must be present in radulae.

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