Reliability of long-term storage products is related to the availability of the whole system, and the evaluation of storage life is of great necessity. These products are usually highly reliable and little failure information can be collected. In this paper, an analytical method based on data from accelerated storage life test is proposed to evaluate the reliability index of the long-term stora...

We investigate the mathematical modelling of maintenance and repair of components that can fail due to a variety of failure mechanisms. Our motivation is to build a model, which can be used to unveil aspects of the quality of the maintenance performed. The model we propose is motivated by imperfect repair models, but extended to model preventive maintenance as one of several “competing risks”. ...

In this paper texture analysis techniques are used to segment rough surfaces into regions of homogeneous texture. The performance of three rough surface classifiers was assessed and compared. The classifiers differ in their discrimination as well as their input and computational requirements. Experiments were used to identify the failure modes of the classifiers and to identify which classifier...

The main purpose of this study is to review the cause for the crankshaft failure of six-cylinder diesel engine of a wheel loader after passing a short period of time. The failure had occurred after 4800 hours of in-service in the fifth crankpin of the crankshaft. Hardness and tensile tests were carried out to study their mechanical properties. Spectrophotometer machine was used to examine the c...

The paper analyzes, in brief, various on-line condition monitoring techniques for rotating electrical machines. The different failure mechanisms of electrical machines and several monitoring techniques are analysed. The advantages, disadvantages and reliability of each technique are underlined. A few of the current state of the art techniques are reviewed by surveying the latest developments in...

Survivable systems are modelled abstractly as collections of services supported by any of a set of configurations of components. Reconfiguration to restore services as a result of component failure is viewed as a kind of “flow” analogous to information flow. We apply Meadows’ theorem on datset aggregates to characterize the maximum safe flow policy. For reconfiguration, safety means that servic...

The nose bridge between the inlet valve and exhaust valve is the most fragile part on the cylinder head. Fatigue crack is the major failure mode. It is necessary to analyze the structure strength and reliability (SSR) of this zone. In this paper, a three-dimensional (3D) model for a engine cylinder head is built up using Pro/Engineer wildfire 2.0, and the 3D FEM analysis of the SSR is carried o...

Masonry in one form or another is used in most areas of the world that are prone to interplate or intraplate earthquakes. Masonry structures constructed from traditionally fired or stone bricks have one characteristic that sets them apart from most other structures. If a masonry building is well constructed, it can last for millenniums. Research in the field of Damage Mechanics has identified t...

congenital hepatic fibrosis (chf) is a rare disease that affects both the liver and kidneys.  congenital hepatic fibrosis (chf) is an autosomal recessive inherited malformation defined pathologically by a variable degree of periportal fibrosis and irregularly shaped proliferating bile ducts. affected individuals also have impaired renal function, usually caused, in children and teenagers, by an...