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MinhNguyen 
Title in Vietnamese: Mô phỏng ứng xử cột ống thép nhồi bê tông có tiết diện thay đổi khi chịu tải nén đúng tâm và lệch tâm. Author: Nguyễn Hữu Thắng Thesis defended in 01/2021, at Ho Chi Minh city University of Technology This work focuses on development of a finite element model for concrete … Read more
Physically, initialization of crack surface is the initialization of new free surface in the solid body, forming a geometrical discontinuity. A numerical model that attempts to simulate cracks as discontinuity is classified as a “sharp crack model”. There are two approaches in “sharp crack” model: directly introduce crack as geometric discontinuity (see Figure 1), or … Read more
Genetic algorithm (GA) is a meta-heuristic technique for solving optimization problems. The algorithm mimics the behavior of nature, such as evolution and survival of the fittest. Basically, a population of n chromosomes are randomly created in the beginning. By applying operators, such as crossover and mutation, the population will be updated through many generations. Only … Read more
Roughly speaking, optimization is finding the feasible set of design variables that leads to optimum value of a specified objective (e.g. minimizing cost, minimizing weight, maximizing fracture toughness etc.). It is preferred that we can reach the global optimum, not a local one. This is also a challenge in solving optimization problem, because we do … Read more