Modeling of Metal Forming and Machining Processes: by Finite Element and Soft Computing MethodsThe use of computational techniques is increasing day by day in the manufacturing sector. Process modeling and optimization with the help of computers can reduce expensive and time consuming experiments for manufacturing good quality products. Metal forming and machining are two prominent manufacturing processes. Both of these processes involve large deformation of elasto-plastic materials due to applied loads. In metal forming, the material is plastically deformed without causing fracture. On the other hand, in machining, the material is deformed till fracture, in order to remove material in the form of chips. To understand the physics of metal forming and machining processes, one needs to understand the kinematics of large deformation (dependence of deformation and its rate on displacement) as well as the constitutive behavior of elasto-plastic materials (dependence of internal forces on deformation and its rate). Once the physics is understood, these phenomena have to be converted to mathematical relations in the form of differential equations. The interaction of the work-piece with the tools/dies and other surroundings also needs to be expressed in a mathematical form (known as the boundary and initial conditions). In this book, the first four chapters essentially discuss the physics of metal forming and machining processes. The physical behavior of the work-piece during the processes is modeled in the form of differential equations and boundary and initial conditions. |
Contents
2 | 33 |
4 | 64 |
Classical Theory of 3 1 | 95 |
97 | 137 |
4 | 195 |
8 | 247 |
5 | 273 |
6 | 345 |
7 | 425 |
5 | 447 |
Unsupervised | 471 |
7 | 500 |
9 | 503 |
6 | 535 |
8 | 545 |
11 | 579 |
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Common terms and phrases
analysis anisotropic anisotropic yield approximation assumed boundary conditions constitutive equation coordinate system Coulomb’s law deformed configuration derivative deviatoric Dixit domain ductile fracture elastic equation Equation equivalent strain Eulerian formulation experimental expression finite element method force vector friction fuzzy set genetic algorithm given by Equation hardening hydrostatic stress incremental deformation incremental displacement vector incremental stress integral interface International Journal isotropic iteration linear strain tensor machining processes membership grade metal forming processes Mises natural coordinates neural network neurons neutral point nodal nodes obtained optimization parameters plane strain plastic deformation prediction problem profile radius punch rate tensor residual stress respect rotation shape functions shear stress sheet sheet metal forming shown in Figure solution strain rate stress components stress rate stress tensor stress vector stress-strain relations t+At tool values velocity wire drawing work-piece yield criterion yield stress yield surface zero