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PROCESS SIMULATION FOR ROOM TEMPERATURE FORMING OF SUPERALLOY SHEETS

BROWSE_DETAIL_CREATION_DATE: 13-06-2016

BROWSE_DETAIL_IDENTIFIER_SECTION

BROWSE_DETAIL_TYPE: Thesis

BROWSE_DETAIL_SUB_TYPE: Masters

BROWSE_DETAIL_PUBLISH_STATE: Unpublished

BROWSE_DETAIL_FORMAT: PDF Document

BROWSE_DETAIL_LANG: English

BROWSE_DETAIL_SUBJECTS: Engineering machinery, tools, and implements, Manufactures,

BROWSE_DETAIL_CREATORS: Durmazer, Yunus (Author),

BROWSE_DETAIL_CONTRIBUTERS: Karadoğan, Celalettin (Advisor),

BROWSE_DETAIL_TAB_KEYWORDS

Sheet metal forming, finite element analyses (FEA), deep drawing, LS-DYNA®, rubber pad forming, segmented radial expansion process, superalloys


BROWSE_DETAIL_TAB_ABSTRACT

Sheet metal forming processes are extensively used in the aviation industry for the production of gas turbine parts such as combustion chambers, exhaust nozzles, sumping assemblies and various hot section elemets. The success of sheet metal forming processes is determined by the process parameters such as die geometries and material properties of sheet metal and auxiliary die equipment. Determination of the optimum inputs by trial and error is a costly and time consuming approach, therefore implementation of finite element analysis has been an inevitable requirement.This paper aims to form a guideline for the preparation of finite element model (FEM) in LS-DYNA® for most frequently used sheet metal forming processes at TEI-TUSAŞ such as deep drawing, rubber pad forming, and segmented radial expansion process. For that purpose, material information and boundary conditions are modeled as accurately as possible. Experimentally determined material data ofivaerospace superalloys (Hastelloy x, Inconel 718, Rene 41, and Waspaloy) are employed to establish material database for the model. Furthermore, anisotropy behaviour of superalloy sheet materials are defined inside the software. Software also lets user to define flow curve of specific materials as stress-strain graph. Using these information, numerical simulation of the manufacturing processes are constructed by finite element modeling software for basic sheet metal forming process, which are; deep drawing, expanding, and rubber pad forming.


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