POTENTIAL LOSS FROM FAILURE FOR NON-REPAIRABLE COMPONENTS AND SYSTEMS WITH MULTIPLE FAILURE MODES

2007 ◽  
pp. 89-120
Author(s):  
M.T. Todinov
Keyword(s):  
Failure Modes ◽  
Multiple Failure Modes ◽  
Potential Loss ◽  
Repairable Components

scholarly journals Mechanism reliability and sensitivity analysis of landing gear under multiple failure modes

2021 ◽  
Vol 39 (1) ◽  
pp. 46-54
Author(s):  
Changcong Zhou ◽  
Mengyao Ji ◽  
Yishang Zhang ◽  
Fuchao Liu ◽  
Haodong Zhao
Keyword(s):  
Failure Probability ◽  
Failure Modes ◽  
Kriging Model ◽  
Landing Gear ◽  
Multiple Failure Modes ◽  
Analysis And Design ◽  
Extension System ◽  
Extension Mechanism ◽  
Assembly Error ◽  
Adaptive Kriging

For a certain type of aircraft landing gear retraction-extension mechanism, a multi-body dynamic simulation model is established, and the time-dependent curves of force and angle are obtained. Considering the random uncertainty of friction coefficient, assembly error, and the change of hinge wear under different retraction times, the reliability model is built including three failure modes of landing gear, i.e. blocking failure, positioning failure and accuracy failure. Based on the adaptive Kriging model, the reliability and sensitivity of retraction-extension system under the condition of single failure mode and multiple failure modes in series are analyzed, and the rule of reliability and sensitivity changing with the number of operations is given. The results show that the system failure probability of landing gear mechanism tends to decrease first and then increase when considering the given information of random factors, and the influences of random factors on the failure probability vary with the number of operations. This work provides a viable tool for the reliability analysis and design of landing gear mechanisms.

Probabilistic modelling of free spanning pipelines considering multiple failure modes

2019 ◽  
Vol 106 ◽  
pp. 104169 ◽  
Author(s):  
Mohammad Mahdi Shabani ◽  
Hadi Shabani ◽  
Narges Goudarzi ◽  
Reza Taravati
Keyword(s):  
Failure Modes ◽  
Probabilistic Modelling ◽  
Multiple Failure Modes

ACCELERATED DURABILITY TESTING AND DATA ANALYSIS FOR PRODUCTS WITH MULTIPLE FAILURE MECHANISMS

2012 ◽  
Vol 19 (06) ◽  
pp. 1240003 ◽  
Author(s):  
ZHIGANG WEI ◽  
SHENGBIN (BURT) LIN ◽  
LIMIN LUO ◽  
FULUN YANG ◽  
DMITRI KONSON
Keyword(s):  
Data Analysis ◽  
Failure Modes ◽  
Cyclic Fatigue ◽  
Testing Procedure ◽  
Accelerated Testing ◽  
Life Assessment ◽  
Multiple Failure Modes ◽  
Testing Procedures ◽  
Design Engineers ◽  
Reliability Performance

Durability and reliability performance is one of the most important concerns of ground vehicle systems, which usually experience cyclic fatigue loadings and eventually fail over time. Creep and oxidation caused damages at elevated temperature conditions further shorten the life of a system and make the life assessment even more complex. One of the key challenges posed to design engineers is to find a way to accelerate the durability tests for products with multiple failure modes and to validate designs within development cycle to satisfy customer's and market's requirements. The accelerated testing procedures for products with single failure modes have been studied for several decades and essentially well established even though some fundamental issues are still unsolved. By contrast, much is needed to do for the accelerated testing procedure of products with multiple failure modes and their interactions. In this paper, a new accelerated testing and data analysis procedure suitable for products with linear homoscedastic data pattern is proposed. Examples related to durability life of high temperature components with single failure modes such as fatigue, creep, and oxidation are provided to demonstrate the procedure developed. Durability life assessment of components with multiple failure modes is also investigated and demonstrated with creep-fatigue and fatigue-oxidation damage analyses.

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