In view of rite effective elastic moduli theory([1]), analyzing the thick composite laminated bars subjected to an externally applied torque are presented by three-dimensional finite element (3-D FEM) and global-local...In view of rite effective elastic moduli theory([1]), analyzing the thick composite laminated bars subjected to an externally applied torque are presented by three-dimensional finite element (3-D FEM) and global-local method in this paper. Numerical results involving the distribution of shearing stresses olt cross-section and the torsional deformation and the interlaminar stresses near to free edges are given. If necessary elements discretization may be densely carried out only in the high stress gradient, region. Obviously, it requires less computer memory and computational time so that it offers an effective way for evaluating strength of laminated bars torsion with a greet number of layers.展开更多
Presents the study on the mechanical behaviors of composite laminates with both static and fatigue tests performed with different notched specimens and concludes with experimental results that ultimate strength and in...Presents the study on the mechanical behaviors of composite laminates with both static and fatigue tests performed with different notched specimens and concludes with experimental results that ultimate strength and initial stiffness of various notched composite laminates is almost as same as un notched ones but the fatigue life of notched specimens is much higher than un notched ones. Compared with metals, composite materials are notch insensitive. The properties measured by using bar type specimens can not represent the real properties of composite laminates. Notches on the free edge may be helpful to the structure. The fatigue life can be predicted through theoretical models established using the residual stiffness model.展开更多
文摘In view of rite effective elastic moduli theory([1]), analyzing the thick composite laminated bars subjected to an externally applied torque are presented by three-dimensional finite element (3-D FEM) and global-local method in this paper. Numerical results involving the distribution of shearing stresses olt cross-section and the torsional deformation and the interlaminar stresses near to free edges are given. If necessary elements discretization may be densely carried out only in the high stress gradient, region. Obviously, it requires less computer memory and computational time so that it offers an effective way for evaluating strength of laminated bars torsion with a greet number of layers.
文摘Presents the study on the mechanical behaviors of composite laminates with both static and fatigue tests performed with different notched specimens and concludes with experimental results that ultimate strength and initial stiffness of various notched composite laminates is almost as same as un notched ones but the fatigue life of notched specimens is much higher than un notched ones. Compared with metals, composite materials are notch insensitive. The properties measured by using bar type specimens can not represent the real properties of composite laminates. Notches on the free edge may be helpful to the structure. The fatigue life can be predicted through theoretical models established using the residual stiffness model.
