Optimal burn-in and preventive maintenance modeling with competing failure processes

Abstract

In this article, we assume that the product in the burn-in procedure only experiences continuous smooth degradation process, while in the field operation period the product experiences both continuous smooth degradation process and shock process. The shock process can cause the product not only traumatic failure, but also additional abrupt degradation damage. After the system reliability model and maintenance model have been proposed, the optimal burn-in setting and age replacement duration are obtained under the considering of minimizing the long run average cost rate. A numerical example with the real data is analyzed to illustrate the application of the model.

Effect of Pre‐Deformation and Subsequent Aging on the Damping Capacity of Mn‐20 at.%Cu‐5 at.%Ni‐2 at.%Fe alloy

“…The crystal defects and internal stress field could be introduced by cold pre‐deformation. Actually, a great number of recent studies have been focused on the effect of pre‐deformation on the properties of various materials, including aluminum alloy, Zirconium alloy, shape memory alloys, FeMn damping alloy and Mn‐15 at% damping alloy . In all, the defects and internal stress distribution aroused by the pre‐deformation play a critical role in affecting the properties of the above alloys.…”

“…In all, the defects and internal stress distribution aroused by the pre‐deformation play a critical role in affecting the properties of the above alloys. Huang S.K et al found the stacking fault probability change caused by the deformation is attributes to the change of FeMn damping capacity. Tian Q et alreported the dependence of dislocation and retained strain energy on the reverse transformation temperature and heat of Mn‐15 at% alloy.…”