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URN etd-0825105-160711 Statistics This thesis had been viewed 3993 times. Download 4169 times. Author We-Bin Chen Author's Email Address No Public. Department Mechanical Engineering Year 2005 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 114 Title The Effects of Cutting Velocity on the Chip Formation in Orthogonal Metal Cutting Using LS-DYNA Keyword Orthogonal Metal Cuttin Finite Element Analysis Finite Element Analysis Orthogonal Metal Cuttin Abstract In this research the finite element analysis software LS-DYNA is used to establish a set of simulation analysis model of a process of a set of metals
orthogonal cutting. The physical quantity such as the stresses and the strains
can be understood when the chip is formed by simulating the real process of metals orthogonal cutting; this is useful for the enhancing the dimensional
accuracy and he improvement of the production. The formulation used in the
analysis model is used to describe the behavior of the 0.18%mild steel material and the physical condition chip separate criterion is used to be the
criterion of the judgement if the undeformed chip separate from the workpiece to form the chip. The tendency of distribution of the cutting forces is very close to the experimental value from the reference, so the model established in this research is reasonable qualitatively.
In this research this model is used to discuss the affections on the chip form at the difference velocity and the high velocity. The results show that the largest effective stress is caused in the primary deformation zone. This shows that the caused deformation is in the primary deformation zone and the largest effective plastic strain is caused in the surface of the tool-chip because of the friction. The shear angle in the shear plane will crease with the cutting velocity. The contact lengths of tool-chip also crease with the cutting velocity but the ratio in the sticking region will increase with the cutting velocity.
Advisor Committee Ching-Chih Tai - advisor
Chung-Liang Tsai - co-chair
Wen-Chou Chen - co-chair
Files Date of Defense 2005-07-30 Date of Submission 2005-08-25