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Implementation of control software of device for measuring residual stresses by drilling method
Švehla, Lukáš ; Houfek, Lubomír (referee) ; Krejčí, Petr (advisor)
The diplom thesis deals with modernization of older drill out machine MTS3000 for measurement of residual stress. To make the device work it is necessary to keep running computer control card and necessary software. Because a producer does not provide any upgrade, it was decided to put the device into operation by creating new software. At first an analysis of drilling method and function of device MTS3000 - Restan was made. Next step was to disassemble and analyze the station of the drilling device. Then the station was put into operation and modified for control via USB device NI USB 6009. Finally a computer program in LabVIEW environment was created to automate the measurement process. Program has two main tasks: one is to control the drilling cycle of the machine. Another one is to acquire data from measuring amplifier station.
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Comprehesive Theoeretical Analysis of Ring-Core Method for Residual Stress Determination
Civín, Adam ; Holý, Stanislav (referee) ; Plánička, František (referee) ; Frydrýšek,, Karel (referee) ; Vlk, Miloš (advisor)
Comprehensive analysis of the ringcore method used for the determination of the residual stresses in mechanical components is presented in this thesis. Principles, advantages, disadvantages and applicability of this semidestructive experimental method are discussed too. At the same time the ringcore method is compared with the hole drilling method, which is used more frequently. All aspects of the ringcore method are analyzed by the finite element method. FE simulations, performed on the universal numerical model, verified principles of the integral method and the incremental strain method. FE simulations also provided basic information for the uncertainty analysis, which significantly affects the accuracy of the residual stress measurement. The main goal, which the present work deals with, is to create a global overview of all ringcore methods´ aspects elaborated in a clear and complex form.
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Implementation of control software of device for measuring residual stresses by drilling method
Švehla, Lukáš ; Houfek, Lubomír (referee) ; Krejčí, Petr (advisor)
The diplom thesis deals with modernization of older drill out machine MTS3000 for measurement of residual stress. To make the device work it is necessary to keep running computer control card and necessary software. Because a producer does not provide any upgrade, it was decided to put the device into operation by creating new software. At first an analysis of drilling method and function of device MTS3000 - Restan was made. Next step was to disassemble and analyze the station of the drilling device. Then the station was put into operation and modified for control via USB device NI USB 6009. Finally a computer program in LabVIEW environment was created to automate the measurement process. Program has two main tasks: one is to control the drilling cycle of the machine. Another one is to acquire data from measuring amplifier station.
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Comprehesive Theoeretical Analysis of Ring-Core Method for Residual Stress Determination
Civín, Adam ; Vlk, Miloš (advisor)
Comprehensive analysis of the ringcore method used for the determination of the residual stresses in mechanical components is presented in this thesis. Principles, advantages, disadvantages and applicability of this semidestructive experimental method are discussed too. At the same time the ringcore method is compared with the hole drilling method, which is used more frequently. All aspects of the ringcore method are analyzed by the finite element method. FE simulations, performed on the universal numerical model, verified principles of the integral method and the incremental strain method. FE simulations also provided basic information for the uncertainty analysis, which significantly affects the accuracy of the residual stress measurement. The main goal, which the present work deals with, is to create a global overview of all ringcore methods´ aspects elaborated in a clear and complex form.
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Comprehesive Theoeretical Analysis of Ring-Core Method for Residual Stress Determination
Civín, Adam ; Holý, Stanislav (referee) ; Plánička, František (referee) ; Frydrýšek,, Karel (referee) ; Vlk, Miloš (advisor)
Comprehensive analysis of the ringcore method used for the determination of the residual stresses in mechanical components is presented in this thesis. Principles, advantages, disadvantages and applicability of this semidestructive experimental method are discussed too. At the same time the ringcore method is compared with the hole drilling method, which is used more frequently. All aspects of the ringcore method are analyzed by the finite element method. FE simulations, performed on the universal numerical model, verified principles of the integral method and the incremental strain method. FE simulations also provided basic information for the uncertainty analysis, which significantly affects the accuracy of the residual stress measurement. The main goal, which the present work deals with, is to create a global overview of all ringcore methods´ aspects elaborated in a clear and complex form.
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