tailieunhanh - trùng Submitted to Ho Chi Minh City University of Technology and Education in partial fullfillment of the requirements for the degree of Doctor of Philosophy

| ANALYSIS OF FUNCTIONALLY GRADED SANDWICH BEAMS UNDER HYGRO THERMO MECHANICAL LOADS By NGUYEN BA DUY DISSERTATION Submitted to Ho Chi Minh City University of Technology and Education in partial fullfillment of the requirements for the degree of Doctor of Philosophy 2019 MAJOR ENGINEERING MECHANICS Ho Chi Minh City September 2019 ANALYSIS OF FUNCTIONALLY GRADED SANDWICH BEAMS UNDER HYGRO THERMO MECHANICAL LOADS By NGUYEN BA DUY DISSERTATION Submitted to Ho Chi Minh City University of Technology and Education in partial fullfillment of the requirements for the degree of Doctor of Philosophy 2019 MAJOR ENGINEERING MECHANICS Ho Chi Minh City September 2019 THE PhD THESIS HAS BEEN COMPLETED AT HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION PhD thesis is protected in front of EXAMINATION COMMITTEE FOR PROTECTION OF DOCTORAL THESIS HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION Date . month . year . ORIGINALITY STATEMENT I hereby declare that this submission is my own work and to the best of my knowledge it contains no materials previously published or written by another person or substantial proportions of material which have been accepted for the award of any other degree or diploma at Ho Chi Minh City University of Technology and Education HCMUTE or any other educational institution except where due acknowledgement is made in the thesis. Any contribution made to the research by others with whom I have worked at HCMUTE or elsewhere is explicitly acknowledged in the thesis. I also declare that the intellectual content of this thesis is the product of my own work except to the extent that assistance from others in the project s design and conception in style presentation and linguistic expression is acknowledged. Date . Signed ACKNOWLEDGEMENTS My thanks go to many people who provided great support and had an important role in this research. I would like to express my gratitude to my supervisor Assoc. Prof. Nguyen Trung Kien and co-supervisors Prof. Vo .