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- 저자 : Bhandhubanyong, Paritud (검색결과 2 건)
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Application of Computer in Hot Forging
Bhandhubanyong, Paritud,Intaranont Kitti,Dechaumpai, Pramote 대한금속재료학회(대한금속학회) 1998 METALS AND MATERIALS International Vol.4 No.4
The research to establish a foundation for metal forging industry was done to gather the data concerning the shape of forging products in domestic factory. The products were classified into three categories with respect to die manufacturing and forging, namely, simple, medium, and complex. Forging process from the initial step of receiving order until final inspection before shipment was studied, Parameters, formula and data were explained along side of each step for the application in actual situation. Furthermore, C-language computer program to calculate forging force was developed. Two types of products were forged and the data collected were used to calculate the multiplication factor C by the formula P=C·σ_m·A. The C values from tested results were in good agreement with the previous research's work. 1t can be concluded that the developed program can be used to calculate and estimate forging force in order to select a suitable forging machine in the factory.
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Adaptive finite elements by Delaunay triangulation for fracture analysis of cracks
Dechaumphai, Pramote,Phongthanapanich, Sutthisak,Bhandhubanyong, Paritud Techno-Press 2003 Structural Engineering and Mechanics, An Int'l Jou Vol.15 No.5
Delaunay triangulation is combined with an adaptive finite element method for analysis of two-dimensional crack propagation problems. The content includes detailed descriptions of the proposed procedure which consists of the Delaunay triangulation algorithm and an adaptive remeshing technique. The adaptive remeshing technique generates small elements around the crack tips and large elements in the other regions. Three examples for predicting the stress intensity factors of a center cracked plate, a compact tension specimen, a single edge cracked plate under mixed-mode loading, and an example for simulating crack growth behavior in a single edge cracked plate with holes, are used to evaluate the effectiveness of the procedure. These examples demonstrate that the proposed procedure can improve solution accuracy as well as reduce total number of unknowns and computational time.
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