Stress analysis of the thoracolumbar junction in the process of backward fall: An experimental study and finite element analysis

According to the situation that the dual-friction drums on the new type towing machine lack stress analysis when designed, the safety is difficult to test and verify. The pull of wire rope in various positions was derived and calculated, so both compressive stress and tangent friction force generated by the pull of wire rope were calculated. The result made by ANSYS software demonstrates the safety of the left drum which suffers from larger loads, structure improvement measures are put forward for the drum.

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Stress Analysis and Structure Optimization for the Opening Flat Cover of Pressure Vessels

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.3253 ◽

2012 ◽

Vol 538-541 ◽

pp. 3253-3258 ◽

Cited By ~ 1

Author(s):

Jun Jian Xiao

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Concentration ◽

Stress Analysis ◽

Structure Optimization ◽

Pressure Vessels ◽

Secondary Stress ◽

Element Analysis ◽

Primary Stress ◽

Flat Cover

According to the results of finite element analysis (FEA), when the diameter of opening of the flat cover is no more than 0.5D (d≤0.5D), there is obvious stress concentration at the edge of opening, but only existed within the region of 2d. Increasing the thickness of flat covers could not relieve the stress concentration at the edge of opening. It is recommended that reinforcing element being installed within the region of 2d should be used. When the diameter of openings is larger than 0.5D (d>0.5D), conical or round angle transitions could be employed at connecting location, with which the edge stress decreased remarkably. However, the primary stress plus the secondary stress would be valued by 3[σ].

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Failure analysis of simple overlap bonding joints and numerical investigation of the adhered tip geometry effect on the joint strength

Materials Testing ◽

10.1515/mt-2021-0035 ◽

2021 ◽

Vol 63 (11) ◽

pp. 1007-1011

Author(s):

İsmail Saraç

Keyword(s):

Finite Element Analysis ◽

Experimental Study ◽

Finite Element ◽

Reference Model ◽

Lap Joints ◽

Shear Stresses ◽

Element Analysis ◽

Single Lap Joints ◽

Failure Loads ◽

Previous Experimental Study

Abstract This study was carried out in two stages. In the first step, a numerical study was performed to verify the previous experimental study. In accordance with the previous experimental study data, single lap joints models were created using the ANSYS finite element analysis program. Then, nonlinear stress and failure analyses were performed by applying the failure loads obtained in the experimental study. The maximum stress theory was used to find finite element failure loads of the single lap joints models. As a result of the finite element analysis, an approximate 80 % agreement was found between experimental and numerical results. In the second step of the study, in order to increase the bond strength, different overlap end geometry models were produced and peel and shear stresses in the adhesive layer were compared according to the reference model. As a result of the analyses, significant strength increases were calculated according to the reference model. The strength increase in model 3 and model 5 was found to be 80 % and 67 %, respectively, relative to the reference model.

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Fixation Effects of Different Types of Cannulated Screws on vertical Femoral Neck Fracture: A Finite Element Analysis and Experimental Study

Medical Engineering & Physics ◽

10.1016/j.medengphy.2021.09.007 ◽

2021 ◽

Author(s):

Shi Zhan ◽

Dajun Jiang ◽

Ming Ling ◽

Jian Ding ◽

Kai Yang ◽

...

Keyword(s):

Finite Element Analysis ◽

Experimental Study ◽

Finite Element ◽

Femoral Neck ◽

Femoral Neck Fracture ◽

Cannulated Screws ◽

Element Analysis ◽

Different Types ◽

Neck Fracture

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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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