Development of femoral component design geometry by using DMROVAS (design method requiring optimum volume and safety)

Advances in Materials Science and Engineering

Kara

2020

Self Cite

The best surface quality that can be achieved in manufactured products has become the main goal of industrial enterprises in recent years. Due to the subsequent increase in energy consumption costs from rising energy efficiency rates, manufacturers are contributing to this issue by applying advanced design functions for their machines. In line with the same objective, this study investigated the machinability of 6061 aluminum alloy, which has a high throughput rate and low machinability featuring built up edge. The aim of the research was to optimize the cutting parameters for minimum surface roughness (Ra) and energy consumption (EC) using a CNC milling machine. At the same time, measurements of power indices (A) of both the spindle and the X-axis motors were carried out with the goal of improved chip removal as compared to literature studies. The experiment was designed according to the Taguchi L16 (21 × 43) orthogonal index. Four different cutting speeds (60, 120, 180, and 240 m/min), feed rates (0.10, 0.15, 0.20, and 0.25 mm/rev), and cutting depths (0.5, 0.10, 0.15, and 0.20 mm) and two different cooling methods (coolant fluid and dry cutting) were selected as cutting parameters.

Section: Taguchi Designmentioning

confidence: 99%

Calculation and Estimation of Surface Roughness and Energy Consumption in Milling of 6061 Alloy

Advances in Materials Science and Engineering

Kara

2020

Self Cite

“…Optimization of the extrusion parameters and also application of processes such as cooling and homogenization are needed in order to control these temperature increases. With the finite element method, an optimum geometry can be obtained in the design of an industrial product that addresses many different current applications [23,24]. To prevent design problems in pipe fittings, a belted design geometry was developed for the stress regions [23].…”

Section: Introductionmentioning

confidence: 99%

“…e goal of research related to the industrial design has been to achieve an ideal design geometry. A new universal method called DMROVAS (design method requiring optimum volume and safety) was proposed to find the optimum design parameters of a tibial component [24]. All safety and stress analyses of the geometries for this design were carried out using the ANSYS program.…”

Section: Introductionmentioning

confidence: 99%

Finite Element‐Based Simulation of Cooling Rate on the Material Properties of an Automobile Silent Block

Advances in Materials Science and Engineering

Kara

2020

Self Cite

The aluminum silent block is the part that connects the front suspension mounting and the road wheels. These products are used in high-speed cars and are subject to high engineering stresses. Over time, fractures occur in the connection part of these products due to insufficient strength. These problems are related to production metallurgy, which led to the concept of this study. During mass production, these parts are manufactured using the aluminum extrusion method. In this study, a rapid cooling process using water was applied, with the aim of improving the mechanical properties of the connecting part exposed to high dynamic loads. Samples were taken from the regions of these products which differed in thickness and width, and microhardness and tensile tests were performed for each region. The effects of both the extrusion cooling rate and the regional flash cooling on the material properties were then characterized. As a result of the isothermal transformation, the grain size in the microstructure of the material had shrunk. According to the findings, in this type of production, an average increase in strength of 25% was observed in the parts of the material subjected to maximum stress. The stress and safety coefficient values were found using finite element analysis, and curves were then drawn showing the differences in the safety coefficient values from the different points. As a result of cooperation between university and industry, the material and mechanical properties of an automobile part were improved in this study. This research has shown that, in terms of the accuracy of the results, it is very important to consider the variations in different regions of the product when defining the mechanical properties of any material produced by applying casting, heat treatment, and plastic forming methods.

“…Altı farklı kesitin her biri ofset araç çubuğuyla 1 mm kalınlaştırılabileceği, böylece emniyet katsayısının artırılabileceği düşünülmektedir.Bununla birlikte hacmin optimum değerde olması için her bir kesitin mukavemet sonuçlarında etki oranlarının belirlenmesi kritik bir öneme sahiptir. Bilimsel araştırmalarda Taguchi yöntemi kullanılarak bir çok farklı optimizasyon araştırması yüksek güvenilirlik oranı ile tamamlanmıştır[25][26][27][28][29]. Bu çalışmada da Taguchi L8 ortogonal deney tasarımı kullanılarak parametrik tasarım yapılmasına karar verilmiştir.…”

unclassified

Kalça Protezlerinde Loft Tasarım Aracı Kesit Değişimlerinin Gerilme Miktarı Üzerine Etkilerinin İncelenmesi

Küçük

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

2020

Self Cite

In patients with severe damage to the hip joints, hip prostheses are used as a result of replacing the damaged joint as an artificial joint. The hip prosthesis consists of main parts made of cobalt chrome or titanium and plastic, metal or ceramic spacers where they join. It is known that there are many design problems related to hip prostheses and their applications. With the aim of solving these problems, three different types of design geometry with industrial design were selected and modeled with the Catia V5 program. Considering the forces affecting the assembly design of these prostheses and femur, the safety coefficient values were calculated under engineering stress in the finite element method. Considering these calculations, among three different industrial designs, the design type whose volume ratio is low and the stress amount is lower than the other designs was determined. It has been observed that this design can be modeled with a loft design tool that includes 6 different sections. The size variation of the profiles in these sections is modeled by making 1 mm offset from the main design geometry. Taguchi L8 experimental design was used for this modeling. Thus, the effect of each section on the strength and volume properties has been analyzed using statistical methods. The volume of these prostheses designed with reverse engineering varies between 31285 and 18438 mm3. Necessary design choices were made by taking these results into consideration in order to obtain minimum volume and maximum safety coefficient. Experimental design parameters for the minimum design were determined as A2, B1, C1, D2, E1, F1. According to these results, the volume was found to be 17975mm3 and the maximum stress on the body as 774 MPa. Thus, the volume amount was reduced by 4%, while the safety factor was increased by 8%. Considering these results, the maximum safety has been obtained for the minimum amount of volume.