The finite element method (FEM) and the boundary element method (BEM) are often adopted. However, they are not convenient to spatially vary thermal properties of functionally graded material (FGM). Therefore, the meth...The finite element method (FEM) and the boundary element method (BEM) are often adopted. However, they are not convenient to spatially vary thermal properties of functionally graded material (FGM). Therefore, the method of lines (MOL) is introduced to solve the temperature field of FGM. The basic idea of the method is to semi-discretize the governing equation into a system of ordinary differential equations (ODEs) defined on discrete lines by means of the finite difference method. The temperature field of FGM can be obtained by solving the ODEs. The functions of thermal properties are directly embodied in these equations and these properties are not discretized in the domain. Thus, difficulty of FEM and BEM is overcome by the method. As a numerical example, the temperature field of a plane problem is analyzed for FGMs through varying thermal conductivity coefficient by the MOL.展开更多
The innovative and unconventional diagonal dividing line fitting clothing is one kind of extraordinary structures. In order to make up the fitting garment,the pattern shape is different from the common structure on ga...The innovative and unconventional diagonal dividing line fitting clothing is one kind of extraordinary structures. In order to make up the fitting garment,the pattern shape is different from the common structure on garment. Besides that,the way of grading series pattern will be different. The fitting garment with 45° fourpiece extraordinary diagonal structure line was taken for example.The series pattern is made directly and the grading rules are found by analyzing the geometric relationship of each grading point in the corresponding pattern. The research technique for extraordinary structures garment is offered. It gives the pattern-maker in garment industry exact grading data on fitting garment with 45° four-piece diagonal structure line. It has practical and scientific guiding sense.展开更多
文摘The finite element method (FEM) and the boundary element method (BEM) are often adopted. However, they are not convenient to spatially vary thermal properties of functionally graded material (FGM). Therefore, the method of lines (MOL) is introduced to solve the temperature field of FGM. The basic idea of the method is to semi-discretize the governing equation into a system of ordinary differential equations (ODEs) defined on discrete lines by means of the finite difference method. The temperature field of FGM can be obtained by solving the ODEs. The functions of thermal properties are directly embodied in these equations and these properties are not discretized in the domain. Thus, difficulty of FEM and BEM is overcome by the method. As a numerical example, the temperature field of a plane problem is analyzed for FGMs through varying thermal conductivity coefficient by the MOL.
文摘The innovative and unconventional diagonal dividing line fitting clothing is one kind of extraordinary structures. In order to make up the fitting garment,the pattern shape is different from the common structure on garment. Besides that,the way of grading series pattern will be different. The fitting garment with 45° fourpiece extraordinary diagonal structure line was taken for example.The series pattern is made directly and the grading rules are found by analyzing the geometric relationship of each grading point in the corresponding pattern. The research technique for extraordinary structures garment is offered. It gives the pattern-maker in garment industry exact grading data on fitting garment with 45° four-piece diagonal structure line. It has practical and scientific guiding sense.
