Structure and mechanical properties of Cresco-Ti laser-welded joints and stress analyses using finite element models of fixed distal extension and fixed partial prosthetic designs

Dissimilar metal welded joints (DMWJs) possess significant localized mechanical heterogeneity. Using finite element software ABAQUS with the User-defined Material (UMAT) subroutine, this study proposed a constitutive equation that may be used to express the heterogeneous mechanical properties of the heat-affected and fusion zones at the interfaces in DMWJs. By eliminating sudden stress changes at the material interfaces, the proposed approach provides a more realistic and accurate characterization of the mechanical heterogeneity in the local regions of DMWJs than existing methods. As such, the proposed approach enables the structural integrity of DMWJs to be analyzed in greater detail.

Download Full-text

Investigation of Pore Structures on Mechanical Properties of Porous Ti by 3D Finite Element Models

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.647.683 ◽

2013 ◽

Vol 647 ◽

pp. 683-687

Author(s):

Mi Gong ◽

Hong Chao Kou ◽

Yu Song Yang ◽

Guang Sheng Xu ◽

Jin Shan Li ◽

...

Keyword(s):

Mechanical Properties ◽

Finite Element ◽

Elastic Modulus ◽

Yield Strength ◽

Finite Element Models ◽

3D Finite Element ◽

Pore Model ◽

Porous Ti ◽

Pore Structures ◽

Medium Porosity

The pore structures on mechanical properties of porous Ti were investigated by 3D finite element models. Calculated elastic modulus and yield strength suggested that square-pore models exhibit lower modulus and higher strength compared with another two kinds of shapes (circle and hexagonal). In addition, under the condition of medium porosity (58.96%), integrated property was found in square-pore model which elastic modulus was 26.97GPa, less than 1/3 of hexagonal-pore model; while the yield strength maintained 63.82MPa, doubled the figure of circle-pore model. Thus, models with square-pore structures show potential perspective as hard tissue replacements. Investigation on anisotropy of microstructure implies that the elastic modulus was affected more intensively than the yield strength.

Download Full-text

Estimates of the mechanical properties of laser powder bed fusion Ti-6Al-4V parts using finite element models

Materials & Design ◽

10.1016/j.matdes.2019.107678 ◽

2019 ◽

Vol 169 ◽

pp. 107678 ◽

Cited By ~ 5

Author(s):

Qi Zhang ◽

Jiawen Xie ◽

Tyler London ◽

David Griffiths ◽

Imran Bhamji ◽

...

Keyword(s):

Mechanical Properties ◽

Finite Element ◽

Finite Element Models ◽

Powder Bed Fusion ◽

Laser Powder Bed Fusion ◽

Powder Bed

Download Full-text

Research on the Influence of the Stiffening Plates on the Stress of Hold Hoop of Bent Cap

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.815.223 ◽

2019 ◽

Vol 815 ◽

pp. 223-228

Author(s):

Qin Tian ◽

Cheng Hao Hang ◽

Yun Peng Zou ◽

Zi Xin Wan

Keyword(s):

Mechanical Properties ◽

Finite Element ◽

Stress Concentration ◽

Structural Parameters ◽

Great Influence ◽

Finite Element Models ◽

Finite Element Software ◽

Bridge Steel ◽

Calculation Results ◽

Shell Finite Element

In order to improve the mechanical behaviour of bridge steel hoops, the plate shell finite element models of several steel hoops were established by using the general finite element software ABAQUS. Through changing the structural parameters of the stiffening plates, the influence of the stiffening plates on the mechanical properties of the steel hoops was explored. The calculation results show that the stress distribution at both ends of the steel hoop is uneven and there is a phenomenon of stress concentration. The spacing of stiffening plates has great influence on the mechanical properties of steel hoop. Some measures to improve the mechanical properties of steel hoop are given.

Download Full-text

Analysis of the Reasonable Construction Size of Concrete Bridge Deck

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.90-93.1027 ◽

2011 ◽

Vol 90-93 ◽

pp. 1027-1032

Author(s):

Xian Xi Tang ◽

Xian Zhou Tang ◽

Yue Xu ◽

Wei Guo

Keyword(s):

Mechanical Properties ◽

Finite Element ◽

Bridge Deck ◽

Bridge Decks ◽

Concrete Bridge ◽

Finite Element Models ◽

Simply Supported ◽

Concrete Bridge Deck ◽

Beam Bridge ◽

T Beam

In order to study the reasonable thickness and width of bridge decks of concrete T beam bridge, 36 ANSYS finite element models of simply supported concrete T beam were established, stress performance of each models have been analyzed under the centre load. The analysis results indicated that when the bridge deck thickness reached 22cm, it was no much sense of influence of bridge decks stress and deflection change by increasing the thickness of the bridge deck, therefore, the recommended value of deck thickness was about 22cm. Since the width of the bridge deck has little effect of the mechanical properties and stiffness of it, so the recommended values of the bridge decks width should be determined combined with the diaphragm and the integral stiffness of T beam bridge.

Download Full-text

Sensitivity Study of Surface Curvature in Characterisation of Cartilage Mechanical Properties

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.393.941 ◽

2013 ◽

Vol 393 ◽

pp. 941-946

Author(s):

Mohd Juzaila Abd Latif ◽

Noor Rizan Adzwa Ismail ◽

Roszaidi Ramlan ◽

Jamaluddin Mahmud ◽

Mohammed Rafiq Abdul Kadir

Keyword(s):

Mechanical Properties ◽

Finite Element ◽

Elastic Modulus ◽

Sensitivity Study ◽

Surface Curvature ◽

Finite Element Models ◽

Geometrical Shape ◽

Computational Studies ◽

Synovial Joint ◽

Cartilage Surface

The mechanical properties of articular cartilage serve as important measures of tissue function or degeneration, and are known to change significantly with asteoarthritis. In previous computational studies, the cartilage surface of axisymmetric models was assumed to be flat in order to evaluate the cartilage behaviour. This assumption was inappropriate since the synovial joint possessed curvature geometrical shape and may contribute to the inaccurate in characterising the cartilage properties. Therefore, this study aims to examine the sensitivity of cartilage surface curvature of characterized cartilage biphasic properties using a combination of experimental and computational methods. Axisymmetric biphasic poroelastic finite element models were generated to measure cartilage surface radius and thickness. Based on the results, the smaller cartilage surface of 20 mm radius produced higher difference of the characterised properties where its generate 9% difference in the permeability and 5% difference in the elastic modulus, compared to the flat cartilage. Based on these results, it may indicate that the cartilage curvature will affect the characterised cartilage biphasic properties of elastic modulus and permeability.

Download Full-text

Mechanical Properties Analysis of Steel-Timber Combined Member

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.347-353.4093 ◽

2011 ◽

Vol 347-353 ◽

pp. 4093-4096

Author(s):

Fu Ting Pan ◽

Lei Kou ◽

Cheng Yu Wang

Keyword(s):

Mechanical Properties ◽

Finite Element Analysis ◽

Finite Element ◽

Structural Member ◽

Finite Element Models ◽

Element Analysis ◽

Steel Core ◽

The Finite Element Analysis ◽

Finite Element Package ◽

Analysis Models

Steel-timber combined member is a new kind of structural member composed of steel core and timber facing with bolt joint.This paper established the finite element analysis models of cantilever beam, and the finite element models were analyzed by the finite element package ANSYS considering the material and geometrically nonlinear.The results were compared with experimental results.Good mechanical properties were verified with comparison between data abtained from the test and calculated results.

Download Full-text

Study of Dynamics Characteristics for Precision Motor Spindle System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.819.389 ◽

2013 ◽

Vol 819 ◽

pp. 389-392

Author(s):

Hong Jun Wang ◽

Qiu Shi Han ◽

Jun Zheng

Keyword(s):

Mechanical Properties ◽

Finite Element ◽

High Speed ◽

Beam Element ◽

Finite Element Models ◽

Spindle System ◽

Spring Element ◽

Static Mechanical ◽

Rotary Speed ◽

Static Mechanical Properties

The structure of a precision high speed spindle system is described. The shaft and bearing finite element models of the spindle system are constructed by using the Timoshenko beam element and the spring-damper unit. The static mechanical properties of spindle system and modal analysis are studied with different spring element arrangement forms. The results showed that the rotary speed designed was far lower than the critical rotary speed which matched with the low-order modal natural frequency of the spindle,so resonance vibration could be effectively avoided.

Download Full-text

An ABAQUS® plug-in for generating virtual data required for inverse analysis of unidirectional composites using artificial neural networks

Engineering With Computers ◽

10.1007/s00366-021-01525-1 ◽

2021 ◽

Author(s):

Yaser Ismail ◽

Lei Wan ◽

Jiayun Chen ◽

Jianqiao Ye ◽

Dongmin Yang

Keyword(s):

Mechanical Properties ◽

Neural Networks ◽

Finite Element ◽

Artificial Neural Networks ◽

Material Properties ◽

Latin Hypercube Sampling ◽

Finite Element Models ◽

Data Generator ◽

Artificial Neural ◽

Virtual Data

AbstractThis paper presents a robust ABAQUS® plug-in called Virtual Data Generator (VDGen) for generating virtual data for identifying the uncertain material properties in unidirectional lamina through artificial neural networks (ANNs). The plug-in supports the 3D finite element models of unit cells with square and hexagonal fibre arrays, uses Latin-Hypercube sampling methods and robustly imposes periodic boundary conditions. Using the data generated from the plug-in, ANN is demonstrated to explicitly and accurately parameterise the relationship between fibre mechanical properties and fibre/matrix interphase parameters at microscale and the mechanical properties of a UD lamina at macroscale. The plug-in tool is applicable to general unidirectional lamina and enables easy establishment of high-fidelity micromechanical finite element models with identified material properties.

Download Full-text