Time-Dependent Reliability Analysis of Monolithic Ceramic Components Using the Cares/Life Integrated Design Program

2009 ◽  
pp. 390-390-19 ◽  
Author(s):  
NN Nemeth ◽  
LM Powers ◽  
LA Janosik ◽  
JP Gyekenyesi
Keyword(s):  
Reliability Analysis ◽  
Integrated Design ◽  
Time Dependent ◽  
Design Program ◽  
Ceramic Components

Failure Prediction Using the Ring-on-Ring Test and the CARES/LIFE Integrated Design Program

1993 ◽  
Author(s):  
Lynn M. Powers ◽  
Jonathan A. Salem ◽  
Sung R. Choi
Keyword(s):  
Integrated Design ◽  
Strain Energy Release ◽  
Strength Distribution ◽  
Time Dependent ◽  
Cumulative Distribution ◽  
Ring Test ◽  
Soda Lime Glass ◽  
Element Analysis ◽  
Design Program ◽  
Fast Fracture

Abstract The integrated design program CARES/LIFE calculates the fast-fracture and time-dependent reliability of monolithic ceramic components subjected to thermomechanical loading. A summary of the program capability is included in the paper. This program is an extension of the CARES (Ceramics Analysis and Reliability Evaluation of Structures) computer program. The results from finite element analysis are used to evaluate component reliability due to inherent surface and/or volume flaws. The two-parameter Weibull cumulative distribution function is used to characterize the variation in component strength. The fast-fracture strength of sintered alpha silicon carbide tested in three- and four-point bend was used to predict the failure strength distribution of ring-on-ring tests. The specimens were tested in the annealed conditions. CARES/LIFE predicted the biaxial failure accurately when the noncoplanar strain energy release rate criterion was applied. For time-dependent life prediction, dynamic fatigue ring-on-ring test data on soda-lime glass is used to demonstrate the fatigue parameter estimation capability of CARES/LIFE.

scholarly journals Time-Dependent Reliability Analysis of Reinforced Concrete Beams Subjected to Uniform and Pitting Corrosion and Brittle Fracture

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1820
Author(s):  
Mohamed El Amine Ben Seghier ◽  
Behrooz Keshtegar ◽  
Hussam Mahmoud
Keyword(s):  
Reinforced Concrete ◽  
Brittle Fracture ◽  
Reliability Analysis ◽  
Pitting Corrosion ◽  
Structural Reliability ◽  
Time Dependent ◽  
State Function ◽  
Rc Beams ◽  
Highly Nonlinear ◽  
Reliability Method

Reinforced concrete (RC) beams are basic elements used in the construction of various structures and infrastructural systems. When exposed to harsh environmental conditions, the integrity of RC beams could be compromised as a result of various deterioration mechanisms. One of the most common deterioration mechanisms is the formation of different types of corrosion in the steel reinforcements of the beams, which could impact the overall reliability of the beam. Existing classical reliability analysis methods have shown unstable results when used for the assessment of highly nonlinear problems, such as corroded RC beams. To that end, the main purpose of this paper is to explore the use of a structural reliability method for the multi-state assessment of corroded RC beams. To do so, an improved reliability method, namely the three-term conjugate map (TCM) based on the first order reliability method (FORM), is used. The application of the TCM method to identify the multi-state failure of RC beams is validated against various well-known structural reliability-based FORM formulations. The limit state function (LSF) for corroded RC beams is formulated in accordance with two corrosion types, namely uniform and pitting corrosion, and with consideration of brittle fracture due to the pit-to-crack transition probability. The time-dependent reliability analyses conducted in this study are also used to assess the influence of various parameters on the resulting failure probability of the corroded beams. The results show that the nominal bar diameter, corrosion initiation rate, and the external loads have an important influence on the safety of these structures. In addition, the proposed method is shown to outperform other reliability-based FORM formulations in predicting the level of reliability in RC beams.

Uncertain time-dependent reliability analysis of corroded RC structures applying three-term conjugate method

2020 ◽  
Vol 115 ◽  
pp. 104599 ◽  
Author(s):  
Mansour Bagheri ◽  
Seyed Abbas Hosseini ◽  
Behrooz Keshtegar ◽  
José A.F.O. Correia ◽  
Nguyen-Thoi Trung
Keyword(s):  
Reliability Analysis ◽  
Time Dependent ◽  
Rc Structures ◽  
Uncertain Time
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