Evaluation of fiber's misorientation effect on compliance and load carry capacity of shaped composite beams

3rd International Youth Scientific Forum with International Participation "New Materials"

Polilov, A.N.^1 ; Tatus, N.A.^1

Mechanical Engineering Research Institute Named by A.A. Blagonravov, Russian Academy of Sciences, 4 Maly Kharitonyevsky Pereulok, Moscow

101990, Russia^1

关键词: Composite beams and plates;    Cross-section area;    Curvilinear fibers;    Effective elastic modulus;    Evaluation methods;    Load carry capacity;    Misorientation angle;    Unidirectional fibers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/347/1/012021/pdf
DOI  :  10.1088/1757-899X/347/1/012021

来源: IOP

【 摘 要 】

The goal of this paper is analysis of design methods for composite beams and plates with curvilinear fiber trajectories. The novelty of this approach is determined by the fact that traditional composite materials are typically formed using prepregs with rectilinear fibers only. The results application area is associated with design process for shaped composite structure element by using of biomechanical principles. One of the related problems is the evaluation of fiber's misorientation effect on stiffness and load carry capacity of shaped composite element with curvilinear fiber trajectories. Equistrong beam with constant cross-section area is considered as example, and it can be produced by unidirectional fiber bunch forming, impregnated with polymer matrix. Effective elastic modulus evaluation methods for structures with curvilinear fiber trajectories are validated. Misorientation angle range (up to 5o) when material with required accuracy can be considered as homogeneous, neglecting fiber misorientation, is determined. It is shown that for the beams with height-to-width ratio small enough it is possible to consider 2D misorientation only.