Virtual prototyping-based fatigue analysis and simulation of crankshaft

Abstract

Fatigue failure is defined as the progressive degradation of the strength of a structural component during the manufacturing of machine tools. As the increasing demands for high product quality result in a continuing need to achieve improvements in fatigue reliability on machining tools, many researches have been focused on it in recent decades with a result of many valuable contributions. However, current researches always focus on the fatigue analysis of rigid components, and the dimension change, necessary design, and optimization are lacked, while the component of a product is always a rigid-flexible coupling multi-body system, which could affect the accuracy and reliability of fatigue analysis, and parameterization help designers see each dimension change. This paper proposed a process of component fatigue analysis based on rigid-flexible coupling virtual prototyping. In this paper, a crankshaft in the cold heading machine is taken as an example to show the rigid-flexible coupling fatigue analysis process in detail. After the parameterization of the crankshaft is proposed, the static analysis and optimization of the crankshaft is carried out. The dynamics analysis for rigidflexible coupling of the cold heading components is also proposed. The fatigue analysis for the crankshaft is discussed in detail. The crankshaft in the cold heading machine is given as an example, which demonstrates that the methodology is obviously helpful to fatigue analysis and simulation. The physical prototyping is also carried out to demonstrate the fatigue reliability. The crankshaft of cold heading machine is given as an example, which demonstrates that the methodology is obviously helpful to fatigue analysis and simulation.

Underactuated robotics: A review

“…The rigid-flexible multi-body system is a hot topic in recent years. Based on the rigid-flexible coupled virtual prototype, He et al [58][59][60][61] carried out modeling, simulation analysis, and numerical simulation for different types of prototypes. This method is of great significance for the mechanical design and dynamic analysis control of multi-body systems in the future.…”

Optimization of internal thread structure of force sensor considering fatigue performance

“…The fatigue force sensor periodically reciprocates during the working process and the main forms of damage are cyclic tension and compression fatigue damage. Based on the ANSYS Workbench finite element analysis, nCode DesignLife software can effectively predict the fatigue life of the structural components under the static and dynamic loads (He et al, 2017). Therefore, in this study, the static strength analysis results are entered as an input to calculate the fatigue life of the elastomer thread structure.…”

Dynamic characteristics analysis of long stroke reciprocating pump combined crank-linkage with rack-pinion mechanism

“…Crankshaft as the core transmission part, its failure mode is usually fatigue fracture. 15,16 Researchers generally used finite element analysis to predict crankshaft fatigue life, 17,18 and observed fatigue cracks to explore crack initiation principle. 19 However, the researches mainly concentrated on fractured crankshaft and how it happened, rather than extend the fatigue life.…”