Modeling and structural stress analysis of thrust bearings

Strength-based design of a sunflower stalk cutter machine design using finite element analysis and experimental validation

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/09544062211059741 ◽

2021 ◽

pp. 095440622110597

Author(s):

Gürkan İrsel

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Analysis ◽

Strain Gage ◽

Experimental Validation ◽

Experimental Studies ◽

Fatigue Analysis ◽

Structural Stress ◽

Element Analysis ◽

Strength Based

In this study, the total algorithm of the strength-based design of the system for mass production has been developed. The proposed algorithm, which includes numerical, analytical, and experimental studies, was implemented through a case study on the strength-based structural design and fatigue analysis of a tractor-mounted sunflower stalk cutting machine (SSCM). The proposed algorithm consists of a systematic engineering approach, material selection and testing, design of the mass criteria suitability, structural stress analysis, computer-aided engineering (CAE), prototype production, experimental validation studies, fatigue calculation based on an FE model and experimental studies (CAE-based fatigue analysis), and an optimization process aimed at minimum weight. Approximately 85% of the system was designed using standard commercially available cross-section beams and elements using the proposed algorithm. The prototype was produced, and an HBM data acquisition system was used to collect the strain gage output. The prototype produced was successful in terms of functionality. Two- and three-dimensional mixed models were used in the structural analysis solution. The structural stress analysis and experimental results with a strain gage were 94.48% compatible in this study. It was determined using nCode DesignLife software that fatigue damage did not occur in the system using the finite element analysis (FEA) and experimental data. The SSCM design adopted a multi-objective genetic algorithm (MOGA) methodology for optimization with ANSYS. With the optimization solved from 422 iterations, a maximum stress value of 57.65 MPa was determined, and a 97.72 kg material was saved compared to the prototype. This study provides a useful methodology for experimental and advanced CAE techniques, especially for further study on complex stress, strain, and fatigue analysis of new systematic designs desired to have an optimum weight to strength ratio.

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Enhanced fatigue structural stress analysis of a heavy vehicle seam welded steel chassis frame: FEA model preparation, weld model description, fatigue stress calculation and correlation with 10 year operating experience

Procedia Engineering ◽

10.1016/j.proeng.2018.02.050 ◽

2018 ◽

Vol 213 ◽

pp. 539-548 ◽

Cited By ~ 3

Author(s):

Jean Abry ◽

Christophe Mittelhaeuser ◽

Sébastien Wolf ◽

Didier Turlier

Keyword(s):

Stress Analysis ◽

Operating Experience ◽

Model Description ◽

Heavy Vehicle ◽

Structural Stress ◽

Welded Steel ◽

Fatigue Stress ◽

Stress Calculation ◽

Fea Model ◽

Model Preparation

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Product Design Development and Structural Stress Analysis of Chain Cutting and Riveting Tool for Automotive Vehicle Application

Advances in Simulation, Product Design and Development - Lecture Notes on Multidisciplinary Industrial Engineering ◽

10.1007/978-981-32-9487-5_66 ◽

2019 ◽

pp. 789-803

Author(s):

G. Ponsanjay ◽

M. V. Tamilselvaa ◽

R. Ramanathan ◽

K. Ganesh Babu

Keyword(s):

Stress Analysis ◽

Product Design ◽

Structural Stress ◽

Design Development ◽

Automotive Vehicle

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Redesigning and Manufacturing of a Land Levelling Shovel by Assembly Structural Stress Analysis

Advances in Mechanical Engineering ◽

10.1155/2014/235687 ◽

2014 ◽

Vol 6 ◽

pp. 235687 ◽

Cited By ~ 2

Author(s):

Tahir Altinbalik ◽

Gürkan İrsel

Keyword(s):

Stress Analysis ◽

Maximum Stress ◽

Stress Conditions ◽

Present Condition ◽

Structural Stress ◽

Loading Conditions ◽

Design Studies ◽

Connection System ◽

New Construction ◽

Bolt Connection

The aim was to redesign and manufacture of a shovel for a pull-type land levelling machine, which, in its present condition, is used to get easily damaged even under low loads. Firstly, the maximum pulling load affecting the levelling shovel was experimentally determined. Then, stable-shovel system with the bolt connection was replaced with a bearing-shaft connection system. In this way, the new shovel has gained a capability of making oscillation motion so that it can operate on sloped grounds. CATIA program was used in the design studies. The shovel system was investigated by assembly structural stress analyses. This new construction enabled the system to operate 3 times more securely at maximum stress conditions without changing the levelling shovel material. Thus, it is managed to prevent any possible damages that might occur due to maximum loading conditions of the system. Besides, displacements that occur on the shovel decreased at the rate of 90%.

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Failure Investigation of the Disc Harrow Profiles and Redesigning by CATIA Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.729.181 ◽

2015 ◽

Vol 729 ◽

pp. 181-186 ◽

Cited By ~ 1

Author(s):

Gürkan Irsel ◽

Tahir Altinbalik ◽

Yilmaz Can

Keyword(s):

Stress Analysis ◽

Agricultural Sector ◽

Design System ◽

Structural Stress ◽

System Construction ◽

Engineering Analysis ◽

Finite Element Stress Analysis ◽

Failure Investigation ◽

Applied Study ◽

Present Design

This article covers an applied study on the computer-aided engineering analysis of the damage occurring in the disc bearing profiles of a disc harrow used in the agricultural sector and redesigning the existing structure.The damage to the machine had occurred in the form of deformation of the plastic structure in the disk-bearing profiles. In order to examine the damage, to collect information on the stress values causing the damage and to re-arrange the damaged design, system construction was modeled with CATIA and structural stress analysis was performed. Results of finite element stress analysis revealed weak regions of the construction under the variable dynamic loading, and the strength with inadequate and improper distribution was determined. Design goals aiming to improve present design were defined in order to prevent the occurrence of damage, and a design meeting these objectives was obtained. The existing system profiles and links were re-arranged in accordance with this design. Then, an experimental analysis consisting of 250 hours of operation was also performed with these new arrangements. No damage occurrence was observed in the new design, so the validity of the design was confirmed.

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Screw Ball Actuator Stress Behavior

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.809-810.616 ◽

2015 ◽

Vol 809-810 ◽

pp. 616-621

Author(s):

Valerian Croitorescu ◽

Gheorghe Tudorache ◽

Ştefan Stamin ◽

Gabriel Jiga

Keyword(s):

Composite Materials ◽

Stress Analysis ◽

Stress Level ◽

Driving Simulator ◽

Early Stage ◽

Static Stress ◽

Structural Stress ◽

Driving Simulators ◽

Stress Behavior ◽

Very High

The new perspectives with regard to early stage beginning vehicles development introduce the need for using driving simulators also. The objective of this study consists in investigating the stress behavior during driving simulator operation at maximum balance angle. The investigation during functioning of the mechanism (the stresses that occur in the system) starts with the static stress analysis, followed by the investigation for different angular positions from 0° to 10° that are mandatory. The analysis can predict the structural stress level that may become very high and generate deficiencies for the entire assembly while using different materials, including composite materials.

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Comparison of Thermo-Mechanical Fatigue Life Assessment Methods for Coke Drums

ASME 2010 Pressure Vessels and Piping Conference: Volume 1 ◽

10.1115/pvp2010-25810 ◽

2010 ◽

Author(s):

Jorge A. Penso ◽

Radwan Hazime

Keyword(s):

Fatigue Life ◽

Crack Initiation ◽

Stress Analysis ◽

Elastic Stress ◽

Life Assessment ◽

Structural Stress ◽

Vast Number ◽

Delayed Coking ◽

Oil Refineries ◽

Mechanical Fatigue

Assessing the life of coke drums is a challenge many refineries have faced since the delayed coking process was introduced in oil refineries. Delayed coking units are among the refinery units that have higher economical yields. Welds play an important role in the life of these vessels. Cracking and bulging occurrences in the coke drums, most often at the weld areas, characterize the history of the operation of delayed coking units. Thermo-mechanical fatigue is the most common cause for cracking in coke drums. Although coke drums constitutes a classical example of thermo-mechanical fatigue there are several other oil processes that are affected by this mechanism. Hence the findings from this work could be useful for other applications. Other possible application examples include mixing points of hot and cold streams, coal gasifiers, and steam generating equipment. There are a vast number of models and methods for estimating the thermo-mechanical fatigue life of engineering components subjected to thermal and mechanical loads. In this work, focus is placed on comparing some of the commonly used methods including: • API 579 methods: - Elastic stress analysis and equivalent stress; - Elastic-plastic stress analysis and equivalent strain; - Elastic stress analysis and structural stress. • Creep-fatigue crack initiation using R5 Volume 2/3. • Non-linear isothermal fatigue analysis using maximum shear strain amplitude with Morrow mean stress correction. In this study, a Finite Element (FEA) model is used to estimate the cyclic stresses and strains for the skirt-to-bottom head attachment weld. The model includes details of the geometry, material properties, boundary conditions, and loads. The results from the FEA are post-processed using the fatigue methods listed above. Lastly, a parametric study on the most important process variables is performed. The results of this work indicate that the predictions of the number of cycles to crack initiation are not significantly different between various crack initiation methods, but they are significantly different when compared with the structural stress method (a through-thickness crack). Thus, the thermo-mechanical fatigue algorithm selection should be based on the assessment goals and service conditions. The parametric analysis showed that the life of the drum is strongly influenced by the switch temperature and quench rates with lower switch temperatures and faster quench rates negatively impacting the life of the drum.

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A STUDY ON THE STRUCTURAL STRESS ANALYSIS OF PLASTIC ANKLE FOOT ORTHOSIS (AFO) UNDER DORSIFLEXION AND PLANTARFLEXTION CONDITIONS

International Journal of Modern Physics B ◽

10.1142/s0217979206041689 ◽

2006 ◽

Vol 20 (25n27) ◽

pp. 4559-4564 ◽

Cited By ~ 4

Author(s):

YOUNG-SHIN LEE ◽

YOUNG-JIN CHOI ◽

HYUN-SOO KIM ◽

HYUN-SEUNG LEE ◽

KANG-HEE CHO

Keyword(s):

Stress Analysis ◽

Structural Characteristics ◽

The State ◽

Structural Stress ◽

Ankle Foot Orthosis ◽

Design Guide ◽

Foot Orthosis

The ankle foot orthosis (AFO) is used as the gait assistive tool for hemiplegic patients. The structural characteristics of the AFO are applied to the state of the patient. However, the prescription guide for hemiplegic patients is not well established. The purpose of this study is to develop design guide to find out the structural characteristics of polypropylene of AFO used for hemiplegics. In this study, the rigidities of dorsiflexion and plantarflexion of the AFO with varied types of ankle widths are investigated and performed by using FEM code.

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