scholarly journals STATISTICAL ANALYSIS OF PROGRESSIVE STRESS ACCELERATED LIFE TEST FOR THE PRODUCT OF TWO-PARAMETER LAPLACE BS FATIGUE LIFE DISTRIBUTION UNDER INVERSE POWER LAW MODEL

2020 ◽  
Vol 10 (6) ◽  
pp. 2767-2786
Author(s):  
Ronghua Wang ◽  
◽  
Beiqing Gu ◽  
Xiaoling Xu ◽  
Keyword(s):  
Fatigue Life ◽  
Statistical Analysis ◽  
Power Law ◽  
Accelerated Life Test ◽  
Power Law Model ◽  
Life Test ◽  
Life Distribution ◽  
Inverse Power Law ◽  
Accelerated Life ◽  
Two Parameter

A DEVELOPMENT OF ACCELERATED LIFE TEST METHOD FOR BLOWER MOTOR FOR AUTOMOBILE USING INVERSE POWER LAW MODEL

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1074-1080 ◽  
Author(s):  
WAE-GYEONG SHIN ◽  
SOO-HONG LEE
Keyword(s):  
Power Law ◽  
Dc Motor ◽  
Test Method ◽  
Accelerated Life Test ◽  
Inverse Power ◽  
Testing Time ◽  
Power Law Model ◽  
Life Test ◽  
Inverse Power Law ◽  
Accelerated Life

Reliability of automotive parts has been one of the most interesting fields in the automotive industry. Especially small DC motor was issued because of the increasing adoption for passengers' safety and convenience. This study was performed to develop the accelerated life test method using Inverse power law model for small DC motors. The failure mode of small DC motor includes brush wear-out. Inverse power law model is applied effectively the electronic components to reduce the testing time and to achieve the accelerating test conditions. Accelerated life testing method was induced to bring on the brush wear-out as increasing voltage of motor. Life distribution of the small DC motor was supposed to follow Weibull distribution and life test time was calculated under the conditions of B 10 life and 90% confidence level.

Small-Sample Accelerated Life Test Method based on the Inverse Power Law Model

2014 ◽  
Vol 8 (4) ◽  
pp. 1725-1730 ◽  
Author(s):  
Yulin Wang ◽  
Bin Zhou ◽  
Tian Ge ◽  
Hutian Feng ◽  
Weijun Tao
Keyword(s):  
Power Law ◽  
Small Sample ◽  
Test Method ◽  
Accelerated Life Test ◽  
Inverse Power ◽  
Power Law Model ◽  
Life Test ◽  
Inverse Power Law ◽  
Accelerated Life

Study of the Accelerated Life Test Method for Power Train Components Under Cyclic Loads Using Weibull-IPL (Inverse Power Law) Model

2003 ◽  
Author(s):  
Geunho Lee ◽  
Hyoungeui Kim ◽  
Dosik Kim
Keyword(s):  
Test Method ◽  
Accelerated Life Test ◽  
Test Time ◽  
Cyclic Loads ◽  
Power Law Model ◽  
Life Test ◽  
Power Train ◽  
Inverse Power Law ◽  
Accelerated Life ◽  
Agricultural Tractor

This study was performed to develop the accelerated life test method using Weibull-IPL (Inverse Power Law) model for power train components that are running on cyclic loads. Weibull-IPL model is concerned with determining the assurance life with confidence level and the accelerated life test time. From the relation of weibull distribution factors and confidence limit, the testing times on the no or some number of failure acceptance criteria are determined. The power train components under cyclic loads generally represent wear and fatigue characteristics as a failure mode. IPL based on the cumulative damage theory is applied effectively the mechanical components to reduce the testing time and to achieve the accelerating test conditions. The proposed Weibull-IPL model is an approach to improve the reliability assessment on the statistical distribution and wear out failure mechanism concepts. As the actual application example, accelerated life test method of agricultural tractor transmission was described. Life distribution of agricultural tractor transmission was supposed to follow Weibull distribution and life test time was calculated under the conditions of average life (MTBF) 3,000 hours and 90% confidence level for one test sample. According to IPL, because test time can be shorten in case increase test load, test time could be reduced by 482 hours when we put the load 1.1 times of rated load than 0.73 times of rated load that is equivalent load calculated by load spectrum of the agricultural tractor. This time, acceleration factor was 11.7. This Weibull-IPL model can be used to develop accelerated test method of gear reducer, hydraulic hose, bearing and etc.

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