An analytical solution is presented for the rotation problem of a two-layer composite elastic cylinder under a plane strain assumption. The external cylinder has variable-thickness formulation, and is made of a hetero...An analytical solution is presented for the rotation problem of a two-layer composite elastic cylinder under a plane strain assumption. The external cylinder has variable-thickness formulation, and is made of a heterogeneous orthotropic material. It contains a fiber-reinforced viscoelastic homogeneous isotropic solid core of uniform thickness. The thickness and elastic properties of the external cylinder are taken as power functions of the radial direction. By the boundary and continuity conditions, the radial displacement and stresses for the rotating composite cylinder are determined. The effective moduli and Illyushin＇s approximation methods are used to obtain the viscoelastic solution to the problem. The effects of heterogeneity, thickness variation, constitutive, time parameters on the radial displacement, and stresses are investigated.展开更多
The deformation and reconstruction of the composite propeller under the static load in the laboratory is studied so as to provide the basic research for the deformation and reconstruction of the underwater deformed pr...The deformation and reconstruction of the composite propeller under the static load in the laboratory is studied so as to provide the basic research for the deformation and reconstruction of the underwater deformed propeller.The fiber Bragg grating(FBG)sensor is proposed to be used for strain monitoring and deformation reconstruction of the carbon fiber reinforced polymer(CFRP)propeller,and a reconstruction algorithm of structural curvature deformation of the CFRP propeller based on strain information is presented.The reconstruction algorithm is verified by using variable-thickness CFRP laminates in the finite element software.The results show that the relative error of the reconstruction algorithm is within 8%.Then,an experimental system of strain monitoring and deformation reconstruction for the CFRP propeller based on the FBG sensor network is built.The propeller blade is loaded in the form of the cantilever beam,and the blade deformation is reconstructed by the strain measured by the FBG sensor network.Compared with the blade deformation measured by three coordinate scanners,the reconstruction relative error is within 15%.展开更多
文摘An analytical solution is presented for the rotation problem of a two-layer composite elastic cylinder under a plane strain assumption. The external cylinder has variable-thickness formulation, and is made of a heterogeneous orthotropic material. It contains a fiber-reinforced viscoelastic homogeneous isotropic solid core of uniform thickness. The thickness and elastic properties of the external cylinder are taken as power functions of the radial direction. By the boundary and continuity conditions, the radial displacement and stresses for the rotating composite cylinder are determined. The effective moduli and Illyushin＇s approximation methods are used to obtain the viscoelastic solution to the problem. The effects of heterogeneity, thickness variation, constitutive, time parameters on the radial displacement, and stresses are investigated.
基金The authors are grateful for the financial support from the National Natural Science Foundation of China(NSFC)(Grant No.51775400).
文摘The deformation and reconstruction of the composite propeller under the static load in the laboratory is studied so as to provide the basic research for the deformation and reconstruction of the underwater deformed propeller.The fiber Bragg grating(FBG)sensor is proposed to be used for strain monitoring and deformation reconstruction of the carbon fiber reinforced polymer(CFRP)propeller,and a reconstruction algorithm of structural curvature deformation of the CFRP propeller based on strain information is presented.The reconstruction algorithm is verified by using variable-thickness CFRP laminates in the finite element software.The results show that the relative error of the reconstruction algorithm is within 8%.Then,an experimental system of strain monitoring and deformation reconstruction for the CFRP propeller based on the FBG sensor network is built.The propeller blade is loaded in the form of the cantilever beam,and the blade deformation is reconstructed by the strain measured by the FBG sensor network.Compared with the blade deformation measured by three coordinate scanners,the reconstruction relative error is within 15%.
