Information countermeasures technology professional graduation design English translation instructionsThe ultrasonic wave propagation in composite materialand its characteristic evaluationJunjie Chang

mitted. The other is solid contact in which the two surfaces are in direct contact and the motion in all directions can be transmitted. The characteristics of ultrasonic wave propagation in composite materials can be evaluated by analyzing the reflection and transmission of the wave at the interface between different layers.

2. Objectives

The objective of this graduation design is to study the ultrasonic wave propagation in composite materials and evaluate its characteristics, including the reflection and transmission of the wave at the interface between different layers. The study will be conducted through simulations by finite element method and experiments on composite material samples.

3. Methodology

The methodology of this graduation design includes the following steps:

Step 1: Literature review

A comprehensive literature review will be conducted to understand the current state-of-the-art in ultrasonic wave propagation in composite materials and its characteristic evaluation.

Step 2: Simulation by finite element method

Simulations by finite element method will be performed to analyze the ultrasonic wave propagation in composite materials and its reflection and transmission at the interface between different layers. The simulation results will be compared with the literature review to validate the accuracy of the simulation model.

Step 3: Experiment on composite material samples

Composite material samples will be prepared for the experiment. Ultrasonic waves will be generated and received by the transducers placed on the surface of the sample. The reflection and transmission of the wave at the interface between different layers will be measured and analyzed.

Step 4: Data analysis

The data collected from the simulation and experiment will be analyzed to evaluate the characteristics of ultrasonic wave propagation in composite materials and its reflection and transmission at the interface between different layers.

4. Expected Results

The expected results of this graduation design include:

1. Simulation results of the ultrasonic wave propagation in composite materials and its reflection and transmission at the interface between different layers.

2. Experimental results of the ultrasonic wave propagation in composite material samples and its reflection and transmission at the interface between different layers.

3. Evaluation of the characteristics of ultrasonic wave propagation in composite materials and its reflection and transmission at the interface between different layers.

5. Conclusion

The study of ultrasonic wave propagation in composite materials and its characteristic evaluation is important for the health monitoring of composite materials and structures. This graduation design aims to provide a comprehensive understanding of the ultrasonic wave propagation in composite materials and its reflection and transmission at the interface between different layers through simulations by finite element method and experiments on composite material samples. The results of this study will contribute to the development of ultrasonic health monitoring technology for composite materials and structures