A Durability Model Incorporating Safe Life Methodology and Damage Tolerance Approach to Assess First Inspection Period for Structures
نویسندگان
چکیده
This paper outlines a new durability model to assess the most economical first inspection period for structures. Practical scatter factor formulae are presented to determine the safe fatigue crack initiation and propagation lives from the result of a single full-scale test of a complete structure. Theoretical prediction techniques are developed to establish the relationship equation between the safe fatigue crack initiation and propagation lives with a specific reliability level using a two-stage fatigue damage cumulative rule. A new durability mathematical model incorporating safe life and damage tolerance design approaches is derived to assess the most economical first inspection period. Finally, the proposed models are applied to assess the most economical first inspection period of a fastening structure at the root of helicopter blade.
منابع مشابه
APPLICATION OF FINITE ELEMENT MODEL UPDATING FOR DAMAGE ASSESSMENT OF SPACE STRUCTURE USING CHARGED SYSTEM SEARCH ALGORITHM
Damage assessment is one of the crucial topics in the operation of structures. Multiplicities of structural elements and joints are the main challenges about damage assessment of space structure. Vibration-based damage evaluation seems to be effective and useful for application in industrial conditions and the low-cost. A method is presented to detect and assess structural damages from changes ...
متن کاملDesign of single-sampling inspection-plan approach by mathematical programming and linear assignment method
This study proposes a new approach for single-sampling plan by determining sample size and acceptance number. The proposed approach is based on a two-step methodology. In the first step: quality management step, different single sampling inspection plans were generated by running an optimization model for different possible acceptance numbers. While, in the second step: Multi-Attribute Decision...
متن کاملSEISMIC ENERGY DEMANDS OF INELASTIC BUILDINGS DESIGNED WITH OPTIMUM DISPLACEMENT-BASED APPROACH
In present study, the effects of optimization on seismic energy spectra including input energy, damping energy and yielding hysteretic energy are parametrically discussed. To this end, 12 generic steel moment-resisting frames having fundamental periods ranging from 0.3 to 3s are optimized by using uniform damage and deformation approaches subjected to a series of 40 non-pule strong ground motio...
متن کاملLow Cycle Fatigue Simulation of Valve Bridge Region in Cylinder Head Based on Critical Plane Model
The reason of this study is low cycle failure of cast iron cylinder head during the E5 standard durability test. The goal of the present investigation is durability test simulation and low cycle fatigue life evaluation of cast iron cylinder head. With uncouple structural analysis, preloads, thermal and mechanical load and boundary conditions are prescribed to finite element model of the cylinde...
متن کاملProbabilistic Approach to the Seismic Vulnerability of RC Frame Structures by the Development of Analytical Fragility Curves
Fragility curves are very useful in quantifying the physical and economic damage of buildings that have undergone an earthquake. This paper presents the development of analytical fragility curves representative of mid-rise residential structures built with reinforced concrete, taking into account the specific structural characteristics of Algerian buildings. The derivation of the analytical fra...
متن کامل