Predictive Fatigue Model for Serpentine Belt Drive Systems
The use of a predictive fatigue crack growth model to monitor progressive deterioration of initially small rib-tip flaws in automotive serpentine belts is presented in this paper. Model is based on computational fracture mechanics and fatigue coupon test data. A global-local finite element analysis procedure is used to compute the J-integral for a through-the-thickness crack in the rib tip. The three-dimensional global model is created with relatively coarse mesh using first order continuum elements in ABAQUS. The local model rib crack is constructed with significantly finer mesh utilizing second order continuum elements. Boundary conditions for the local model are driven by global displacements. Maximum and minimum J-integrals are calculated at two extreme configurations for a single belt running cycle. The range of the J-integral is input into the curve fitted power law to derive the fatigue crack growth rate and hence the fatigue life for the belt. Fatigue life is significantly increased with decreasing crack size.
S. Saikrishna et al., "Predictive Fatigue Model for Serpentine Belt Drive Systems," SAE 2006 World Congress & Exhibition Proceedings, Society of Automotive Engineers, Jan 2006.
The definitive version is available at http://dx.doi.org/10.4271/2006-01-0018
SAE 2006 World Congress & Exhibition
Mechanical and Aerospace Engineering
Keywords and Phrases
Finite Element Analysis; Spark Ignition Gasoline Engines
Article - Conference proceedings
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