alireza arghavan | Islamic Azad University, Semnan Branch (original) (raw)
Uploads
Papers by alireza arghavan
ijetae.com
A number of criteria and associated statistical analysis procedures are proposed for relating the... more A number of criteria and associated statistical analysis procedures are proposed for relating the dynamic wheel forces generated by heavy vehicles to road surface damage. The criteria are evaluated in the time domain and therefore require time histories of the dynamic forces generated by all axles of a vehicle. Also required for some of the criteria is the calculation of transient stresses and strains in road structure during the passage of a vehicle. A method for performing this calculation is described. The criteria may be used for evaluating the road damaging effects of simulated or measured wheel forces. This paper presents used a quarter car model (passive suspension System) in according road classification ISO 2631-1 is achieved road roughness interval in form of optimization method Gamma(4p) distribution as PSD function in different constant speed of car (34, 70 and 100 Km/h) by using Matlab Code. In continually, for a critical conditions of transfer function (bounce natural frequency = 1.0 and damping ratio is 0.5) Simulated vehicle dynamics and study transfer function on the passive suspension system in Simulation environment of Matlab Program in all road classification (A-E) with different vehicle velocity.
Investigating Fatigue is one the most important factors in designing most mechanical structure. T... more Investigating Fatigue is one the most important factors in designing most mechanical structure. The reason is that, in many cases, the specimens of the structure break down without any warning or signal. Nano and micron's Coatings are finding more and more applications in industry such as aerospace, automotive, and naval industries. The present article has a purpose. Firstly, it intends to explore the influence of four industrial coatings, namely, hardened chromium, embellished chromium, hardened nickel, and warm galvanizing, all of which have the thickness value at micron levels on fatigue specimens. Moreover, it aims to find the most convenient coating. To achieve these purposes, the abovementioned coatings with the thickness of 13 & 19 were coated on standard specimens who were made of CK45 steel under the same conditions. Then, the S-N curve of each sample was attained empirically according to the standard fatigue testing. Specimens are simulated in the finite element analysis according to experimental conditions and then S-N curve of each sample was attained. Finally, comparing the S-N curves, the most appropriate coating is introduced for the delineated conditions and based fatigue results may be predicted damage of coating.
ijetae.com
A number of criteria and associated statistical analysis procedures are proposed for relating the... more A number of criteria and associated statistical analysis procedures are proposed for relating the dynamic wheel forces generated by heavy vehicles to road surface damage. The criteria are evaluated in the time domain and therefore require time histories of the dynamic forces generated by all axles of a vehicle. Also required for some of the criteria is the calculation of transient stresses and strains in road structure during the passage of a vehicle. A method for performing this calculation is described. The criteria may be used for evaluating the road damaging effects of simulated or measured wheel forces. This paper presents used a quarter car model (passive suspension System) in according road classification ISO 2631-1 is achieved road roughness interval in form of optimization method Gamma(4p) distribution as PSD function in different constant speed of car (34, 70 and 100 Km/h) by using Matlab Code. In continually, for a critical conditions of transfer function (bounce natural frequency = 1.0 and damping ratio is 0.5) Simulated vehicle dynamics and study transfer function on the passive suspension system in Simulation environment of Matlab Program in all road classification (A-E) with different vehicle velocity.
Investigating Fatigue is one the most important factors in designing most mechanical structure. T... more Investigating Fatigue is one the most important factors in designing most mechanical structure. The reason is that, in many cases, the specimens of the structure break down without any warning or signal. Nano and micron's Coatings are finding more and more applications in industry such as aerospace, automotive, and naval industries. The present article has a purpose. Firstly, it intends to explore the influence of four industrial coatings, namely, hardened chromium, embellished chromium, hardened nickel, and warm galvanizing, all of which have the thickness value at micron levels on fatigue specimens. Moreover, it aims to find the most convenient coating. To achieve these purposes, the abovementioned coatings with the thickness of 13 & 19 were coated on standard specimens who were made of CK45 steel under the same conditions. Then, the S-N curve of each sample was attained empirically according to the standard fatigue testing. Specimens are simulated in the finite element analysis according to experimental conditions and then S-N curve of each sample was attained. Finally, comparing the S-N curves, the most appropriate coating is introduced for the delineated conditions and based fatigue results may be predicted damage of coating.