College of Engineering and Polymer Science
Date of Last Revision
Aerospace Systems Engineering
Aerospace Honors Project 001 4900_497_001_4221
Number of Credits
Bachelor of Science
Date of Expected Graduation
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.
Gregory N Morscher
Honors Faculty Advisor
Bush, John J.; Swartzentruber, Alex D.; Thompson, Lukas B.; Pratt, Sarah R.; and Kuhn, Chris J., "The Effects of Geometry and Architecture of Polymer Matrix Composites on Acoustic Emissions" (2022). Williams Honors College, Honors Research Projects. 1556.