During the past two decades, considerable efforts have been made in the development of high performance spring steels to meet the needs for weight and savings in the automotive industry. During the service the suspens...During the past two decades, considerable efforts have been made in the development of high performance spring steels to meet the needs for weight and savings in the automotive industry. During the service the suspension system will be subjected to different environmental conditions, at the same time it has to sustain a variety of loads acting on it. Among all the wear of spring steel plays a vital role. In this experimental analysis an attempt has been made to investigate the performance of spring steel (EN-47 / SUP 10) under the dry sliding condition. The specimen preparation and the experimentations have been carried out according to the ASTM G99 standards. The effects of tempering and cryogenic treatments on the performance of the spring steel have also been determined. The results have revealed that the material condition has got a significant influence on the performance of the spring steel. In order to analyze the percentage contribution of different wear parameter and the material condition, the DOE and ANOVA have been made. The results have shown that the load (49.205%) has shown the highest influence and the material condition has shown 22.56% of contribution on wear behavior.展开更多
In the present work an attempt has been made in order to investigate the drilling behavior of the TiO2 and ZnS filled Glass Fabric Reinforced Polymer Matrix Composites (GFRP). The volume fractions in the matrix were c...In the present work an attempt has been made in order to investigate the drilling behavior of the TiO2 and ZnS filled Glass Fabric Reinforced Polymer Matrix Composites (GFRP). The volume fractions in the matrix were chosen as 1%, 2% and 3%. Drilling has been conducted on a radial drilling machine. Speed of drilling and drill tool diameter were considered as the varying parameters with three levels. Thrust force has been considered as the output parameter and is been measured in each combination of parameters chosen. Results reveal that, the addition of filler will increase the thrust force developed during drilling, also results indicate that, addition of filler will increase thrust force upto 2 volume % of filler thereafter increase in filler content result in almost constant thrust developed. Also it can be observed that, with the increase in drill tool diameter the thrust developed also increases.展开更多
文摘During the past two decades, considerable efforts have been made in the development of high performance spring steels to meet the needs for weight and savings in the automotive industry. During the service the suspension system will be subjected to different environmental conditions, at the same time it has to sustain a variety of loads acting on it. Among all the wear of spring steel plays a vital role. In this experimental analysis an attempt has been made to investigate the performance of spring steel (EN-47 / SUP 10) under the dry sliding condition. The specimen preparation and the experimentations have been carried out according to the ASTM G99 standards. The effects of tempering and cryogenic treatments on the performance of the spring steel have also been determined. The results have revealed that the material condition has got a significant influence on the performance of the spring steel. In order to analyze the percentage contribution of different wear parameter and the material condition, the DOE and ANOVA have been made. The results have shown that the load (49.205%) has shown the highest influence and the material condition has shown 22.56% of contribution on wear behavior.
文摘In the present work an attempt has been made in order to investigate the drilling behavior of the TiO2 and ZnS filled Glass Fabric Reinforced Polymer Matrix Composites (GFRP). The volume fractions in the matrix were chosen as 1%, 2% and 3%. Drilling has been conducted on a radial drilling machine. Speed of drilling and drill tool diameter were considered as the varying parameters with three levels. Thrust force has been considered as the output parameter and is been measured in each combination of parameters chosen. Results reveal that, the addition of filler will increase the thrust force developed during drilling, also results indicate that, addition of filler will increase thrust force upto 2 volume % of filler thereafter increase in filler content result in almost constant thrust developed. Also it can be observed that, with the increase in drill tool diameter the thrust developed also increases.
