tailieunhanh - Tóm tắt luận án Tiến sĩ chuyên ngành Cơ học: Đánh giá và mô phỏng các hệ số đàn hồi đa tinh thể hỗn độn

Mục tiêu nghiên cứu của đề tài "Đánh giá và mô phỏng các hệ số đàn hồi đa tinh thể hỗn độn" là tìm ra các đánh giá tốt hơn các đánh giá đã có, đưa ra được các kết quả so sánh đánh giá giải tích và PTHH cụ thể. Mời các bạn cùng tham khảo. | MINISTRY OF EDUCATION VIETNAM ACADEMY OF ANDTRAINING SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY --------------------------- VUONG THI MY HANH ESTIMATES AND SIMULATIONS FOR THE ELASTIC MODULI OF RANDOM POLYCRYSTALS Major Mechanics of Solid Code 9440107 SUMARY OF DOCTORAL THESIS IN MECHANICS HA NOI - 2020 The thesis has been completed at Graduate University Science and Technology -Vietnam Academy of Science and Technology. Supervisor 1 Prof. DrSc. Pham Duc Chinh Supervisor 2 Dr. Le Hoai Chau Reviewer 1 Prof. Dr. Pham Chi Vinh Reviewer 2 Assoc. Prof. Dr. La Duc Viet Reviewer 3 Assoc. Prof. Dr. Tran Bao Viet Thesis is defended at Graduate University Scienc and Technology- Vietnam Academy of Science and Technology at . . on . . 2020 Hardcopy of the thesis be found at - Library of Graduate University Science and Technology - Vietnam national library 1 PREFACE 1. Reason of choosing the thesis a. Objective reason Polycrystalline materials are being used extensively in all areas of human life. The study of elastic coefficients for this material yields many analytical results Voigt Ruess Hill Hashin-Strikman Pham Duc Chinh . However the finite element method FEM results are not surffice for comparison. The question is are these estimates the best how to calculate by the FEM how the FEM results compared to these estimates . b. Subjective reason Homogenization of materials is a long-term research field of supervisor Pham Duc Chinh and Material Mechanics team with many published results. The PhD candidate completed the master s thesis on homogenization of thermal conductivity for isotropic composite materials. Therefore author has selected the topic quot Estimates and simulation for the elastic moduli of random polycrystals quot as the research thesis. 2. Aim research method of the thesis a. Aim to find better estimates compare results of analytic method and FEM. b. Method using energy principles and applying analytical and numerical methods .