Fiber reinforced laminated composites, due to its unique molding process, have many excellent mechanical properties at the same time, there are some weak points, such as the serious anisotropy, low interlayer shear strength, impact load sensitivity and so on. For these characteristics,Laminated Tube
Based on the study of the reaction performance and failure process of laminated composite materials under low velocity impact load, this paper mainly discusses the geometrical and material parameters, such as the orthogonal anisotropic parameters, that is, the ratio of the modulus along the fiber direction to the vertical fiber direction modulus.Laminated Tube
Laminated composite plates with a thickness of H are bonded together by a multilayer unidirectional composite under certain technological conditions. Each layer of material is homogeneous orthogonal anisotropy, the fiber reinforced direction of each layer is arbitrary. A system is considered to be composed of a laminated composite plate structure in the center subjected to external impact loads.Laminated Tube
For homogeneous isotropic plates, it is generally considered that the b/h>20 (b is the short edge of two direction scales in the face) is the thin plate. The thin plates can be analyzed by two-dimensional plate element model, ignoring the effect of shearing deformation. However, this boundary does not necessarily apply to laminated composite plates, because the transverse shear stiffness of laminated plates is lower, even in the case of b/h greater than homogeneous isotropic plate, the shear deformation is often evident. It is necessary to study the effect of b/h on the impact response of laminated plates.Laminated Tube
As a general result, fiber-reinforced composites are different in the direction of fiber and perpendicular to the fiber, but the properties of the material in all directions perpendicular to the fiber can be regarded as identical, that is, transversely isotropic (take E3=e2, g13=g23). So the impact response from the three-dimensional model is not quite different from the two-dimensional results.Laminated Tube
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