College

College of Engineering and Polymer Science

Date of Last Revision

2022-05-03 07:30:15

Major

Aerospace Systems Engineering

Honors Course

Aerospace Honors Project 001 4900_497_001_4221

Number of Credits

2

Degree Name

Bachelor of Science

Date of Expected Graduation

Spring 2022

Abstract

The purpose of this project is to study how the variance of the geometry and architecture of polymer matrix composites (PMCs) affect the acoustic emissions measured whilst said structures are subjected to tensile stress. In these tests, a method called Modal AE will be utilized. In Modal AE, some relationships between sources and waves in various materials and geometries are presented in other papers/research. This study will focus on how different thickness and different makeup/ply patterns affect the acoustic emission tests. Some research has been completed and shown how energy attenuation affects the frequency content on PMCs similar to the ones chosen for this project. Using a similar test setup and analysis the goal of this project is to see if the thickness/geometry of these samples will affect energy attenuation and therefore affect frequency content. The reason frequency content is so important in AE is that it is a method of exploring the different damage modes PMCs experience during stress tests. From this data more information can be obtained about frequency content and the effects that energy attenuation/architecture/geometry can have on PMCs. These AE events can also be used to identify the location of a break and to see how internal breaks have propagated through the structure. Polymer matrix composites (PMCs) are widely used in the aerospace industry, particularly in structures securing thrust generating systems to the primary structure. Each test subjects a polymer matrix composite (PMC) of a specific thickness and weave design to determine the damage modes for each sample. The peak frequency of the propagated acoustic emissions with respect to the time domain will also be measured.

Research Sponsor

Gregory N Morscher

First Reader

Manigandan Kannan

Second Reader

Yogesh Singh

Honors Faculty Advisor

Scott Sawyer

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