4H1 Finite element analysis of spine cage in the uniaxial compression test

2013 ◽  
Vol 2013 (0) ◽  
pp. 261-262
Author(s):  
Takako OSAWA ◽  
Shigeaki MORIYAMA ◽  
Tomoyo YUTANI ◽  
Naoyuki NISHIMURA ◽  
Yuki USUI ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Uniaxial Compression ◽  
Compression Test ◽  
Uniaxial Compression Test ◽  
Element Analysis

Determination of sealing pressure in hyperelastic O-ring with different hardness using numerical method

2018 ◽  
Vol 51 (7-8) ◽  
pp. 684-697 ◽  
Author(s):  
T Sukumar ◽  
BR Ramesh Bapu ◽  
B Durga Prasad
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Uniaxial Compression ◽  
Compression Test ◽  
Material Parameter ◽  
Uniaxial Compression Test ◽  
Stress Strain ◽  
Element Analysis ◽  
Strain Data ◽  
Sealing Pressure

In automotive industries, leakage is one of the major problem reducing the efficiency in hydraulic and pneumatic system. The leakage in a device can be identified only during the physical test, once after the product is developed, leading to increased development time and cost. The leakage is purely based on the type of sealing element (O-rings) and sealing pressure. Since the sealing elements are hyperelastic and exhibit highly nonlinear behavior, there is no standard formulation available to predict the sealing pressure. It can be predicted using finite element analysis (FEA) in the design stage itself. One of the main inputs for the finite element analysis is the exact material parameter of the sealing element. This article aims at determining the sealing element material parameter using stress–strain data generated from uniaxial compression test and sealing pressure considering different hardness using finite element analysis. To generate the stress–strain data, compression force is applied on the test specimen at the rate of 12 mm/min and compressed up to 25% of its initial height with help of uniaxial compression test machine as per ASTM D 575. In this article, O-ring is considered as sealing element with hardness ranging from 40 IRHD to 90 IRHD.

Long Wavelength Buckling of Cubic Open-Cell Foams Subjected to Uniaxial Compression

2007 ◽  
Vol 353-358 ◽  
pp. 583-586 ◽  
Author(s):  
Dai Okumura ◽  
Atsushi Okada ◽  
Nobutada Ohno
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Uniaxial Compression ◽  
Elastic Buckling ◽  
Element Analysis ◽  
Open Cell ◽  
Buckling Strength ◽  
Long Wavelength ◽  
Onset Condition ◽  
Open Cell Foams

In this study, the elastic buckling strength of cubic open-cell foams subjected to uniaxial compression is investigated using the homogenization framework developed by the present authors (Ohno et al., JMPS 2002; Okumura et al., JMPS 2004). First of all, based on the framework, the microscopic bifurcation and macroscopic instability of cubic open-cell foams are numerically analyzed by performing finite element analysis. It is thus shown that long wavelength buckling is the primary mode and occurs just after the onset of macroscopic instability. Then, a solution for predicting the stress of long wavelength buckling is analytically derived from the onset condition of macroscopic instability. The validity of this analytical solution is demonstrated by the finite element results.

scholarly journals Numerical investigation of the mechanical properties of the additive manufactured bone scaffolds fabricated by FDM: the effect of layer penetration and post-heating

2017 ◽  
Author(s):  
Saman Naghieh ◽  
Mohammad Reza Karamooz-Ravari ◽  
Mohsen Badrossamay ◽  
Ehsan Foroozmehr
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Elastic Modulus ◽  
Numerical Methods ◽  
Finite Element Model ◽  
Compression Test ◽  
Element Model ◽  
Element Analysis ◽  
Bone Scaffolds

In recent years, thanks to additive manufacturing technology, researchers have gone towards the optimization of bone scaffolds for the bone reconstruction. Bone scaffolds should have appropriate biological as well as mechanical properties in order to play a decisive role in bone healing. Since the fabrication of scaffolds is time consuming and expensive, numerical methods are often utilized to simulate their mechanical properties in order to find a nearly optimum one. Finite element analysis is one of the most common numerical methods that is used in this regard. In this paper, a parametric finite element model is developed to assess the effects of layers penetration׳s effect on inter-layer adhesion, which is reflected on the mechanical properties of bone scaffolds. To be able to validate this model, some compression test specimens as well as bone scaffolds are fabricated with biocompatible and biodegradable poly lactic acid using fused deposition modeling. All these specimens are tested in compression and their elastic modulus is obtained. Using the material parameters of the compression test specimens, the finite element analysis of the bone scaffold is performed. The obtained elastic modulus is compared with experiment indicating a good agreement. Accordingly, the proposed finite element model is able to predict the mechanical behavior of fabricated bone scaffolds accurately. In addition, the effect of post-heating of bone scaffolds on their elastic modulus is investigated. The results demonstrate that the numerically predicted elastic modulus of scaffold is closer to experimental outcomes in comparison with as-built samples.

scholarly journals Finite element analysis of an optimized hybrid stiffened plate

2021 ◽  
Vol 342 ◽  
pp. 06003
Author(s):  
Sándor Szirbik ◽  
Zoltán Virág
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Uniaxial Compression ◽  
Shell Theory ◽  
Base Plate ◽  
Stiffened Plate ◽  
Element Analysis ◽  
Design Variables ◽  
The Finite Element Analysis ◽  
The Cost

This paper is devoted to the modal analysis and buckling of a stiffened plate with simple supported conditions within the framework of shell theory. The main objective of the finite element analysis is to investigate the natural frequencies of this stiffened structure subjected to uniaxial compression on two opposite edges of the plate. In this study, the numerical analysis is performed for such a design of the stiffed plate which has already been optimized for uniaxial compression, some design variables and the cost of welding, and the objective function to be minimized is defined as the material cost. The various Young’s modulus of the base plate and the stiffeners are given thus assuming that the plate parts (the base plate and ribs) were made of different steel materials.

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