Abstract
The topic of this thesis is the construction of a formula to approximate stress-strain responses at notches under thermomechanical fatigue (TMF) loading. The understanding of material behavior of the V-notched component which experiences TMF is important to the mechanical industries where V-notched structures are often utilized. In such applications, it is crucial that the designers be able to predict the material behavior; therefore, the purpose of this research is to examine and to model the precise effects a stress concentration will have on a specimen made of a generic Ni-base superalloy. The effects of non-isothermal loading will be studied, and it is the goal of this research to formulate an extension of Neuber's rule appropriate for TMF which is to approximate the temperature range with a single value, T'. One strategy to extend Neuber's rule, which relies on Finite Element Modeling (FEM), Bilinear Kinetic Hardening Model (BKIN), and test data, will be used to predict the stress-strain behavior at the notch of a thin plate subjected to axial loading. In addition, the CHABOCHE model will be utilized in the FEA to have the highest fidelity to material response at high temperatures. Parametric study of the FEA simulations will be employed to determine the correlation between the Neuber hyperbola, temperature range, stress concentration, the nominal stress, and the temperature cycling. Using the Neuber hyperbola and simplified constitutive model (i.e., bilinear kinematic strain hardening), the stress-strain solutions of the specimen will be calculated and compared to analytical results.
Notes
If this is your Honors thesis, and want to learn how to access it or for more information about readership statistics, contact us at STARS@ucf.edu
Thesis Completion
2013
Semester
Spring
Advisor
Gordon, Ali P.
Degree
Bachelor of Science in Aerospace Engineering (B.S.A.E.)
College
College of Engineering and Computer Science
Degree Program
Aerospace Engineering
Subjects
Dissertations, Academic -- Engineering and Computer Science;Engineering and Computer Science -- Dissertations, Academic
Format
Identifier
CFH0004440
Language
English
Access Status
Open Access
Length of Campus-only Access
None
Document Type
Honors in the Major Thesis
Recommended Citation
Nguyen, Trung, "Application of non-local approaches for predicting the response of v-notch under thermomechanical fatigue loading" (2013). HIM 1990-2015. 1444.
https://stars.library.ucf.edu/honorstheses1990-2015/1444