Inlämning av Examensarbete / Submission of Thesis

CHANDRA SHEKHAR PRASAD BTH-AMT-EX--2009/D-01--SE, pp. 124. TEK/avd. för maskinteknik, 2009.

The work

Författare / Author: CHANDRA SHEKHAR PRASAD
c.prasad1981@gmail.com
Titel / Title: FINITE ELEMENT MODELING TO VERIFY RESIDUAL STRESS IN ORTHOGONAL MACHINING
Abstrakt Abstract:

The aim of this thesis paper, to create a numerical model to examine the residual stresses induced by orthogonal machining in the finished work piece and the model is validated by comparing with experimental result.
The finite element method is used to simulate and analyze the residual stresses induced by a orthogonal metal cutting process.
A Dynamics explicit time integration technique with Arbitrary Lagrangian Eulerian (ALE) adaptive meshing Finite Element Method (FEM) is employed to simulate the model. The Johnson-Cook material model is used to describe the work material behaviour and fully coupled thermal-stress analysis are combined to realistically simulate high speed machining with an orthogonal cutting.
Finite Element modelling of Residual stresses and resultant surface properties induced by round edge cutting tools is performed as case studies for high speed orthogonal machining of 20NiCrMo5 steel.
As a conclusion we can say that results from 2D simulations are very close to the experimental results at the surface level, but there is bit difference when we go down in the material. In 3D simulation, results agree with the experimental values in all levels So we can say that it is possible to model residual stresses, induced by orthogonal machining with accepted amount of accuracy.
Keywords
Residual stress, FE-modelling, ALE formulation,3D.ABAQUS/CAE

Populärvetenskaplig beskrivning / Popular science summary: FEM,ALE, ABAQUS
Ämnesord / Subject: Maskinteknik - Mechanical Engineering\Structural Mechanics
Maskinteknik - Mechanical Engineering\Structural Dynamics
Mathematics\Analysis
Nyckelord / Keywords: FEM, ALE, ABAQUS

Publication info

Dokument id / Document id:
Program:/ Programme Masters programme in Mechanical Engineering, 60 points
Registreringsdatum / Date of registration: 06/16/2009
Uppsatstyp / Type of thesis: Magisterarbete/Master's Thesis (60 credits)

Context

Handledare / Supervisor: Dr. Ansel Berghuvud
abe@bth.se
Examinator / Examiner: Dr. Ansel Berghuvud
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: TEK/avd. för maskinteknik
S-371 41 Karlskrona
+46 455 38 50 00
I samarbete med / In co-operation with: Swerea KIMAB,Scania AB,Sandvik Coromant AB,KTH

Files & Access

Bifogad uppsats fil(er) / Files attached: bth_amt_ex_2009d01_se.pdf (2952 kB, öppnas i nytt fönster)