Xiaoyang Lu

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A non-linear combined hardening constitutive equation was implemented to predict stress after forming process. The model can describe the cyclic strain hardening by the isotropic hardening and the Bauschinger effect by the kinematic hardening. Lemaitre and Chaboche nonlinear kinematic hardening theory was adopted to consider cyclic behavior and the(More)
Sample database was established and the mapping relationship between span,rise-span ratios and type of shell with minimum weight was simulated by using BP neural network method. The selected typical samples were chosen from hundreds of sectional optimized results based on sequential two-level algorithm from five typical types of reticulated domes. This(More)
With Computational Fluid Dynamics (CFD) software FLUENT, the flow characteristics of an elbow of the West-east oil pipelines was analyzed. The results of the velocity vector-graph and fluid pressure distribution of the elbow were also obtained. The distribution of fluid pressure on elbow wall was found. Furthermore, the secondary flow can be precisely(More)
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