scholarly journals An Attempt to Model the Surface Pressures of Apples Using the Finite Element Method

2021 ◽  
Vol 11 (16) ◽  
pp. 7579
Author(s):  
Daniel Szyjewicz ◽  
Łukasz Kuta ◽  
Paulina Działak ◽  
Roman Stopa
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Biological Material ◽  
Impact Load ◽  
External Factors ◽  
Simplified Model ◽  
The Finite Element Method ◽  
Fem Model ◽  
Actual Object ◽  
Element Method

Apples are the most popular fruits grown in Polish orchards. In order to obtain the best quality fruit, it is necessary to improve plantation maintenance, fruit harvesting, and processing. Given that many fruits are exposed to external factors, including forces that adversely affect their structure—causing them to crack, bruise, or crush—it is necessary to provide conditions that do not adversely affect their quality. Therefore, the aim of this article was to develop a simplified model of an apple that could be tested under different loads using the finite element method. The parameters of the model were selected to reflect the actual apple as accurately as possible. To assess the apples under impact load, as well as the construction of the FEM model, concrete and wooden substrates were used, where apples were dropped from height of 10 mm and 30 mm. Due to this research, an apple model was obtained that reflects the actual object very well (high R2 coefficient). In addition, the layering and distribution of surface pressures of the real and model objects from the distribution are presented. This shows that the constructed model corresponds to the behaviour of the biological material, subjected to loads in real conditions.

Pipeline On-Bottom Stability Analysis Based on FEM Model

2011 ◽  
Author(s):  
Yong Bai ◽  
Zhimeng Yu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Design Procedure ◽  
Element Model ◽  
The Finite Element Method ◽  
Fem Model ◽  
Engineering Software ◽  
Calculation Results ◽  
Pipeline Design ◽  
Element Method

Pipeline on-bottom stability is one of the sophisticated problems in subsea pipeline design procedure. Due to the uncertainty of the pipe-soil interaction and environment loads, including wave, current, or earthquake, etc., it is classified as the typical nonlinear problem. The Finite Element Method is introduced into pipeline engineering several years ago. More and more special engineering software such as AGA, PONDUS are available in market. However, when doing a project, some abnormal data was found when compared the DnV calculation results and AGA. In order to know the behavior of pipeline on seabed under wave and current load, finite element method – ABAQUS is introduced to do this analysis. The ABAQUS/explicit is used to simulate 600s pipeline dynamic response. The pipeline is supposed to be exposed on seabed and the selected seabed model is large enough to avoid the edge effect. ABAQUS calculation results are compared with the requirements in DnV rules to verify the validity of finite element model.

Application of the Williams Expansion near a Bi-Material Interface

2017 ◽  
Vol 754 ◽  
pp. 206-209 ◽  
Author(s):  
Lucie Malíková ◽  
Stanislav Seitl
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Crack Tip ◽  
Higher Order ◽  
Simplified Model ◽  
The Finite Element Method ◽  
Material Interface ◽  
Higher Order Terms ◽  
Element Method ◽  
Crack Tip Stress

A simplified model of a crack approaching a bi-material interface is modelled by means of the finite element method in order to investigate the significance of the higher-order terms of the Williams expansion for the proper approximation of the opening crack-tip stress near the bi-material interface. The discussion on results is presented and the importance of the higher-order terms proved.

The Elasticity-Plasticity Analysis of Composite Foundation with Lime-Soil Pile by FEM

2012 ◽  
Vol 170-173 ◽  
pp. 762-765
Author(s):  
Ying Cui ◽  
Guang Wei Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Carrying Capacity ◽  
Stress Ratio ◽  
Composite Foundation ◽  
The Finite Element Method ◽  
Fem Model ◽  
The Status ◽  
As Stress ◽  
Element Method

With a certain actual lime-soil pile composite foundation project for background, the Finite Element Method (FEM) model of composite foundation was carried out by using the Drucker-Prager theory and ANSYS FEM procedure. By imitating the status of composite foundation under the construction load and analyzing the factors such as stress, settlement, stress ratio between pile and soil, carrying capacity of composite foundation with lime-soil pile has been gained. The conclusions offer some beneficial references to design and construction of actual projects.

scholarly journals Simplified Model for the Hybrid Method to Design Stabilising Piles Placed at the Toe of Slopes

2018 ◽  
Vol 149 ◽  
pp. 02059
Author(s):  
M. Dib ◽  
S. Kouloughli
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Hybrid Method ◽  
Analytical Techniques ◽  
Element Model ◽  
Simplified Model ◽  
The Finite Element Method ◽  
Stabilizing Piles ◽  
Analytical Approaches ◽  
Element Method

Stabilizing precarious slopes by installing piles has become a widespread technique for landslides prevention. The design of slope-stabilizing piles by the finite element method is more accurate comparing to the conventional methods. This accuracy is because of the ability of this method to simulate complex configurations, and to analyze the soil-pile interaction effect. However, engineers prefer to use the simplified analytical techniques to design slope stabilizing piles, this is due to the high computational resources required by the finite element method. Aiming to combine the accuracy of the finite element method with simplicity of the analytical approaches, a hybrid methodology to design slope stabilizing piles was proposed in 2012. It consists of two steps; (1): an analytical estimation of the resisting force needed to stabilize the precarious slope, and (2): a numerical analysis to define the adequate pile configuration that offers the required resisting force. The hybrid method is applicable only for the analysis and the design of stabilizing piles placed in the middle of the slope, however, in certain cases like road constructions, piles are needed to be placed at the toe of the slope. Therefore, in this paper a simplified model for the hybrid method is dimensioned to analyze and design stabilizing piles placed at the toe of a precarious slope. The validation of the simplified model is presented by a comparative analysis with the full coupled finite element model.

Impact Damage Analysis and Experimental Test of Carbon/Epoxy Composite Laminate

2015 ◽  
Vol 1120-1121 ◽  
pp. 590-592
Author(s):  
Hyoh Yun Choi ◽  
Yeon Jun Lim ◽  
Hyun Jun Cho ◽  
Hyun Bum Park
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Composite Laminate ◽  
Impact Analysis ◽  
Impact Damage ◽  
The Finite Element Method ◽  
Fem Model ◽  
The Impact ◽  
Method Analysis ◽  
Element Method

In this work, study on impact damage FEM model of composite structure was performed. From the finite element method analysis results of composite laminate, it was confirmed that the results of analysis was reasonable. The velocity of impactor to initiate damage was estimated, and in order to investigate the damage at the predicted velocity, impact analysis using finite element method was performed. According to the impact analysis results of composite laminate, it was confirmed that the damage was generated at the estimated impact velocity. Finally, the comparison of the numerical results with those measured by the experiment showed good agreement.

scholarly journals STUDY OF THE COMPRESSION BEHAVIOR OF SUNFLOWER SEEDS USING THE FINITE ELEMENT METHOD

AGROFOR ◽  
2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Sorin-Ștefan BIRIȘ ◽  
Mariana IONESCU ◽  
Neluș-Evelin GHEORGHIȚĂ ◽  
Nicoleta UNGUREANU ◽  
Nicolae-Valentin VLĂDUȚ
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Mechanical Tests ◽  
Sunflower Seeds ◽  
Compression Tests ◽  
The Finite Element Method ◽  
Compression Process ◽  
Fem Model ◽  
Compression Behavior ◽  
Element Method

It is known that the phenomena that occur during compression of sunflower seedsare very complex. Comprehension of these phenomena is important for increasingthe performance of the equipment in the vegetable oil industry, both for thecracking of shells and for the grinding of kernels. Also for the pressing of oilseedmaterials it is helpful to understand the compression behavior of sunflower seeds.The major objective of this work is to find an easy way of highlighting how thestresses and deformations propagate in sunflower seeds kernels and shells duringthe compression process, with the aim of optimizing the energy consumptionrequired for the mechanical processing. Therefore, now days there is and we canuse the finite element method. This method is the most advanced engineering toolfor computing numerical and mathematical modeling of complex phenomenainvolving the propagation of stress and strain fields in continuous media. In thispaper a two-dimensional FEM model for analyzing sunflower seeds subjected atcompression by axial and lateral directions is presented. For experimentalvalidation of FEM model we made uniaxial compression tests on sunflower seeds,using a Hounsfield/Tinius Olsen unit for mechanical tests, H1KS model. Themodels used in this work highlight that the orientation of the seeds is veryimportant. There are situations when it is desirable that the stresses to be higher (atshelling, grinding, pressing, etc.) or situations when it is desirable that the stressesto be smaller (at transport, storage, etc.).

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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