Journal ArticleDOI
A fatigue model for shape optimization.
J. Grunwald,E. Schnack +1 more
TLDR
In this paper a more detailed description of fatigue within continuum damage mechanics (CDM) considering the loading history is introduced and two new cost functions are determined for shape optimization of dynamically loaded machine parts.Abstract:
Almost any machine part is dynamically loaded and fails in most cases by fatigue. Nevertheless many authors recommend just a static shape optimization based on the minimization of maximum stress to improve the lifetime. In this paper a more detailed description of fatigue within continuum damage mechanics (CDM) considering the loading history is introduced. On this basis, two new cost functions are determined for shape optimization of dynamically loaded machine parts. An optimization procedure is built up using the methods of mathematical programming (MP). The optimized parts show a remarkably increased lifetime in numerical results as well as in experiments.read more
Citations
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Journal ArticleDOI
Topology optimization for minimum weight with compliance and simplified nominal stress constraints for fatigue resistance
TL;DR: In this paper, a simplified approach to cope with the optimization of preliminary design of structures under local fatigue constraints along with a global enforcement on the overall compliance is proposed, which aims at the minimization of the weight of linear elastic structures under given loads and boundary conditions.
Journal ArticleDOI
Robust shape optimization of notches for fatigue-life extension
M. McDonald,M. Heller +1 more
TL;DR: In this paper, an iterative 2D finite-element-based optimization procedure has been developed which incorporates robust design philosophies, and a robust stress method is developed that produces a notch shape that minimizes the peak stress and renders it constant for a range of load orientations.
Journal ArticleDOI
Shape optimization of structural parts in dynamic mechanical systems based on fatigue calculations
P. Häussler,Albert Albers +1 more
TL;DR: In this article, a new method for an automated shape optimization of dynamically loaded components in mechanical systems is presented, which is carried out by means of the results of a durability analysis based on finite elements.
Journal ArticleDOI
Shape optimization under fatigue using continuum damage mechanics
Eckart Schnack,Wolfgang Weikl +1 more
TL;DR: An introduction and overview of the developments in shape optimization for fatigue problems is given, and an optimal algorithm results for the shape optimization of mechanical engineering structures using continuum damage mechanics.
Journal ArticleDOI
Three-dimensional structural design optimisation based on fatigue implementing a genetic algorithm and a non-similitude crack growth law
Kumanan Krishnapillai,Rhys Jones +1 more
TL;DR: In this paper, the generalised Frost-Dugdale law was used together with a genetic algorithm in a numerical study of a 7050-T7451 aluminium structure, where the design objective is the fatigue life of the structure.
References
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Book
Mechanics of Solid Materials
TL;DR: In this article, the physical mechanisms of deformation and fracture are discussed, including linear elasticity, thermo-elasticity, and viscoelastic properties of real solids.
Journal ArticleDOI
A simple error estimator and adaptive procedure for practical engineerng analysis
O. C. Zienkiewicz,J. Z. Zhu +1 more
TL;DR: A new error estimator is presented which is not only reasonably accurate but whose evaluation is computationally so simple that it can be readily implemented in existing finite element codes.
Book
A Course on Damage Mechanics
TL;DR: In this article, the authors present a detailed analysis of the physical properties of the solid state and damage, including elasticity, deformation, shrinkage, and elasticity of the material.
Book
Introduction to continuum damage mechanics
L. M. Kachanov,D. Krajcinovic +1 more
TL;DR: In this article, a model for Ductile Fracture under Uniaxial Stress and Fracture Under MultiaxiaXial Stress is presented. But the model does not consider the effect of fatigue on the model.