Comparison Analysis of Efficiency for Step-Down and Step-Up Stress Accelerated Life Testing

2012 ◽  
Vol 61 (2) ◽  
pp. 590-603 ◽  
Author(s):  
Ronghua Wang ◽  
Naijun Sha ◽  
Beiqing Gu ◽  
Xiaoling Xu
Keyword(s):  
Accelerated Life Testing ◽  
Life Testing ◽  
Comparison Analysis ◽  
Accelerated Life ◽  
Step Down

Double-Crossed Step-Stress Accelerated Life Testing for Pneumatic Cylinder

2011 ◽  
Vol 121-126 ◽  
pp. 1274-1278 ◽  
Author(s):  
Juan Chen ◽  
De Yi Wang ◽  
Yong Ling Fu ◽  
Xiao Ye Qi
Keyword(s):  
Stress Testing ◽  
Estimation Error ◽  
Accelerated Life Testing ◽  
Constant Stress ◽  
Pneumatic Cylinder ◽  
Average Lifetime ◽  
Life Testing ◽  
Failure Data ◽  
Accelerated Life ◽  
Step Down

This paper discusses the principle and method of Double-Crossed Step-Down-Stress Accelerated Life Testing (DCSDS-ALT) for pneumatic cylinders. As to pneumatic cylinder, the step-down-stress testing failure physics can be described as cumulative degradation model. Temperature and frequency are normally chosen as the test stresses. The failure data obtained under DCSDS-ALT testing steps can be converted to those under constant stress testing. And the reliability specifications can be derived accordingly. To compare Double-stress ALTs with traditional constant stress testing shows Double-stress ALTs can meet the accuracy demand. The 5% of average lifetime estimation error and 1.85% of the characteristic lifetime error are very satisfying for pneumatic industrial lifetime prediction.

Double Crossed Step-Down-Stress Accelerated Life Testing for Pneumatic Cylinder Based on Cumulative Damage Model

2013 ◽  
Vol 871 ◽  
pp. 56-63 ◽  
Author(s):  
Juan Chen ◽  
Jia Li ◽  
De Yi Wang ◽  
Dian Liang Fan ◽  
Xiao Ye Qi
Keyword(s):  
Stress Testing ◽  
Stress Test ◽  
Cumulative Damage ◽  
Accelerated Life Testing ◽  
Constant Stress ◽  
Pneumatic Cylinder ◽  
Life Testing ◽  
Failure Data ◽  
Accelerated Life ◽  
Step Down

Double Crossed Step-Down-Stress Accelerated Life Testing (DCSDS-ALT) discussed in this paper was implemented by switch down the double stresses alternately. Compared to constant stress test, step-stress test decreased specimen numbers, time and cost, and eventually well improve the accelerated testing efficiency. For pneumatic cylinder, the step-down-stress testing failure physics can be described as cumulative degradation model. By use of cumulative damage General Log-Linear relationship and Weibull assumption, the failure data obtained were equivalently converted to failure data under constant stress testing. Then the reliability specifications can be derived with better accuracy. The 5% of average lifetime estimation error and 1.85% of the characteristic lifetime error are very satisfying for pneumatic industrial lifetime prediction.

ACCELERATED LIFE TESTING OF COMPONENTS OF NUCLEAR RESEARCH REACTORS

2016 ◽  
Author(s):  
Vanderley Vasconcelos ◽  
WELLINGTON SOARES ◽  
Antonio Carlos Lopes da Costa ◽  
Raíssa Oliveira Marques
Keyword(s):  
Nuclear Research ◽  
Accelerated Life Testing ◽  
Life Testing ◽  
Research Reactors ◽  
Accelerated Life
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