A Multi-Criteria Strength-Stress Reliability Optimization Model in Engineering Design

摘要

Reliability and design engineers are often faced with conflicting objectives (I.e., maximize reliability and minimize total cost), which limits operational and safety features. The two common variables in this area are stress and strength, where the reliability of a component is the probability that the strength (of a component) is greater than the stress (acting on the component). Obviously achieving high reliability levels while minimizing cost poses considerable limitations due to their conflicting nature. Therefore, this research employs a bi-criteria strength-stress optimization model, using a weighted Tchebycheff function, to find (weakly) efficient solutions. For illustration, a numerical example is provided.