Two main of mechanisms of damage in rails and wheel contacts are wear and Rolling Contact Fatigue (RCF).The material selection for the wheel and rails is based on wheel wear, where the wear rate of wheels is greater than that of the rails. It can be seen that the wear of wheel surfaces results in the removal of the initiated micro cracks that would be subject to propagation and failure with rolling contact fatigue. However, despite this advantage, the micro cracks initiated on the rail surfaces gradually propagate and cause sudden fracture or detachment of a piece of the rail surface material. This could cause derailments, which is a vitally important issue in rail transportation. This paper investigates the mechanisms of RCF failure, which is a primary phenomenon in rails. Recently, due to the introduction of high velocity trains and increased axel loads, this issue has drawn greater attention, especially with regards to failure mechanisms, prediction of failures, effective parameters and predictive methods.
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.