关键词: 定向量纲, 相似律, 相似畸变, 弹性层合板, 冲击响应

Abstract: Using scale model experiments to predict the response of full-scale engineering structures under impact loads has the advantages of being economical, efficient, and feasible. As lightweight, high strength composite materials are widely used in large-scale aero-space structures, the study of the impact similitude theory and scaling methods for composite materials is becoming increasingly important. For the similarity scaling problem of elastic laminate under impact response, conventional scaling methods are limited by the strict requirements of layup configuration and scale factors in prototype structure, thus nearly impossible to achieve. This article combines the ODLV directional dimension impact similarity law system with elastic laminate constitutive equation, derives the impact similarity law of elastic laminates, and obtains laminate stiffness coefficient scale factors which de-scribed by the directional dimension. Based on the similitude relationship, a similitude distortion modified method was proposed: first adjusting the ply angles of scaled models to achieve stiffness compatibility, then modifying the impact velocity to achieve similarity in the elastic laminated plate impact response. Simulation results show that the scale models have good similarity with the prototype structure in displacement, impact force, and impact energy response, suggests that the designed scale model under the instruction of the laminate impact similarity scaling method proposed in this article can effectively predict the impact dynamic response of the prototype structure.

Key words: Oriented dimension,, Similarity law,, Similitude distortion,, Elastic composite laminate,, Impact response