Prediction of Mechanical Properties of Ceramic Biocomposite on the Basis of Numerical Modeling

2017 ◽  
Vol 743 ◽  
pp. 172-175 ◽  
Author(s):  
Valentina A. Mikushina ◽  
Igor Yu. Smolin ◽  
Yury N. Sidorenko
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Numerical Modeling ◽  
Stress Distribution ◽  
Damage Accumulation ◽  
Strength Criterion ◽  
Stress Distributions ◽  
Mesoscopic Level ◽  
Distribution Laws ◽  
Prediction Of Mechanical Properties

The numerical simulation of biocomposites consisting of zirconia-based ceramics and cortical bone was performed with the use of a multilevel approach. The mechanical properties of the ceramic biocomposite were determined. The evolution of mesoscopic stress distributions in the biocomposite components during the process of its deformation was investigated, taking into account damage accumulation up to the fulfillment of the macro strength criterion. It is shown that damage accumulation has an impact on the stress distribution laws at the mesoscopic level, which is manifested through the appearance of a threshold for the stress distribution, as well as through a significant decrease in the distribution amplitude.

scholarly journals A model for predicting stress distribution and strain-force characteristics in regular braided ropes

2021 ◽  
Vol 16 ◽  
pp. 155892502199048
Author(s):  
Zhang Yujing ◽  
Meng Zhuo ◽  
Du Chengjie ◽  
Yao Linlin ◽  
Sun Yize
Keyword(s):  
Mechanical Properties ◽  
Mathematical Model ◽  
Stress Distribution ◽  
Mechanical Failure ◽  
Stress Distributions ◽  
Marine Exploration ◽  
Force Characteristics ◽  
Recreation Activities

Owing to the good mechanical properties of braided structures, regular braided ropes are increasingly being used in various fields, including marine exploration, aloft work, recreation activities, and oil prospecting. However, under certain severe conditions, they could break, a situation that is absolutely undesired. Thus, predicting their stress distribution and strain-force characteristics when they are subjected to different tensile loads is a pre-requisite for their application. Therefore, in this study, a mathematical model for ropes with regular braided structures is developed, and based on the model, this study reveals that uneven stress distributions in the different strands of regular braided ropes generate different stress distributions and strain-force characteristics in each of the strands. Additionally, the uneven stress distributions in the different strands also induce mechanical failure more readily. Finally, to ensure the reliability of braided ropes in different applications, different strand parameters are compared.

Study on the Properties of SiC/Mullite Porous Ceramics Based on ANSYS Numerical Simulation

2014 ◽  
Vol 608-609 ◽  
pp. 976-980
Author(s):  
Yang Chao
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Stress Distribution ◽  
Wall Thickness ◽  
Reference Data ◽  
Porous Ceramic ◽  
Porous Ceramics ◽  
Simulation Software ◽  
Curvature Radius ◽  
Element Simulation

In this paper, we use foam injection coagulation method to fabricate SiC/mullite porous ceramic with porosity 38-80%. In order to study the performance of the ceramic, we use the principle of cavity to establish the fourteen surfaces model of the SiC/ mullite porous ceramics, and use the ANSYS finite element simulation software to simulate the performance of ceramic, and do simulation on the mechanical properties of the ceramics. In order to study the influence of different wall thickness and curvature on the properties of ceramics, we calculate the structure stress distribution of fourteen surfaces when wall thickness is 0.4 and 0.5mm. When the wall thickness is 0.2mm, we study the structure stress distribution with radius 0.1mm and 0.2mm. So we obtain the influence of wall thickness and curvature radius on the properties of porous ceramics. It provides valuable reference data for the study on porous ceramics.

Numerical Simulation on Stress Distribution and Failure of Composites Holes with Cold Expansion

2013 ◽  
Vol 770 ◽  
pp. 221-225
Author(s):  
Yuan Qing Cheng ◽  
Hong Hua Su ◽  
Yu Can Fu ◽  
En De Ge
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Stress Distribution ◽  
Stress Distributions ◽  
Uniform Stress ◽  
Expansion Process ◽  
Interference Fit ◽  
Cold Expansion ◽  
Metal Materials ◽  
Failure Conditions

A numerical investigation was conducted to apply cold expansion methods on composites structures under the guidance of cold expansion techniques of metal materials and interference-fit techniques of composites structures. Finite element expansion models with sleeves or without sleeves are established to study the stress distributions and failure conditions around cold expanded holes with different expansion values (0.5%, 1% and 1.5%). Results show that no damage occurs with expansion value 0.5% and using a sleeve in the expansion process can cause uniform stress distributions.

Roll optimization via numerical modeling of stress distribution

2020 ◽  
Vol 62 (1) ◽  
pp. 35-39
Author(s):  
Vyacheslav Goryany ◽  
Erich Schubrikoff ◽  
Olga Myronova
Keyword(s):  
Numerical Modeling ◽  
Stress Distribution

scholarly journals Symmetric Nature of Stress Distribution in the Elastic-Plastic Range of Pinus L. Pine Wood Samples Determined Experimentally and Using the Finite Element Method (FEM)

Symmetry ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 39
Author(s):  
Łukasz Warguła ◽  
Dominik Wojtkowiak ◽  
Mateusz Kukla ◽  
Krzysztof Talaśka
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Stress Distribution ◽  
Moisture Content ◽  
Tool Geometry ◽  
Wood Fibers ◽  
Data Set ◽  
Plastic Deformations ◽  
Pine Wood ◽  
Elastic Plastic

This article presents the results of experimental research on the mechanical properties of pine wood (Pinus L. Sp. Pl. 1000. 1753). In the course of the research process, stress-strain curves were determined for cases of tensile, compression and shear of standardized shapes samples. The collected data set was used to determine several material constants such as: modulus of elasticity, shear modulus or yield point. The aim of the research was to determine the material properties necessary to develop the model used in the finite element analysis (FEM), which demonstrates the symmetrical nature of the stress distribution in the sample. This model will be used to analyze the process of grinding wood base materials in terms of the peak cutting force estimation and the tool geometry influence determination. The main purpose of the developed model will be to determine the maximum stress value necessary to estimate the destructive force for the tested wood sample. The tests were carried out for timber of around 8.74% and 19.9% moisture content (MC). Significant differences were found between the mechanical properties of wood depending on moisture content and the direction of the applied force depending on the arrangement of wood fibers. Unlike other studies in the literature, this one relates to all three stress states (tensile, compression and shear) in all significant directions (anatomical). To verify the usability of the determined mechanical parameters of wood, all three strength tests (tensile, compression and shear) were mapped in the FEM analysis. The accuracy of the model in determining the maximum destructive force of the material is equal to the average 8% (for tensile testing 14%, compression 2.5%, shear 6.5%), while the average coverage of the FEM characteristic with the results of the strength test in the field of elastic-plastic deformations with the adopted ±15% error overlap on average by about 77%. The analyses were performed in the ABAQUS/Standard 2020 program in the field of elastic-plastic deformations. Research with the use of numerical models after extension with a damage model will enable the design of energy-saving and durable grinding machines.

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