Identification of Temperature Dependent Material Properties in Composite Plates Utilizing Experimental Vibration Data

In recent three decades, composite materials have received an increasing interest among engineers and scientists. These materials are characterized by a higher stiffness with reduced weight, compared to commonly used materials such as aluminum or steel. It is not surprising that a wide range of applications emerged within the aerospace and transportation sector for example for aircraft and high-speed train hulls. However, these composite materials are generally made out of fiber and matrix material. This material behavior strongly depends on the environmental conditions such as temperature. This results in a complex macroscopic material behaviour and the precise knowledge of the corresponding properties is a key factor for computer aided engineering and virtual prototyping. Especially when composite structures are subjected to dynamic loading and changing temperatures, resonances can occur and ultimately lead to fatal dynamic behavior in the absence of sufficient damping. Therefore, the experimental investigation of the material behavior under dynamic loading for different temperatures together with a proceeding parameter identification scheme is necessary to precisely capture the material properties of the underlying model, which is the essence of the work at hand. Utilizing the presented approach, the parameter identification is easy to implement and reliable.