Start Date

2016 12:00 AM

Description

Reducing the timeline for certification of composite materials and enabling the expanded use of advanced composite materials for aerospace applications are two primary goals of NASA’s Advanced Composites Project (ACP). A key technical challenge area for accomplishing these goals is the development of rapid composite inspection methods with improved defect characterization capabilities. Ongoing work at NASA Langley is focused on expanding ultrasonic simulation capabilities for composite materials. Simulation tools can be used to guide the development of optimal inspection methods. Custom code based on elastodynamic finite integration technique is currently being used to explore ultrasonic wave interaction with manufacturing defects, such as in-plane fiber waviness (marcelling). This presentation will describe details of recent validation comparisons performed prior to simulating guided wave propagation in composites containing fiber waviness. Results from simulation based studies of guided wave interaction with fiber waviness, as well as preliminary experimental results, will be discussed. Lastly, the presentation will discuss updates on progress towards optimizing simulation code for improved computational speed.

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Simulation Studies of Ultrasound Interaction with Composite Manufacturing Defects

Reducing the timeline for certification of composite materials and enabling the expanded use of advanced composite materials for aerospace applications are two primary goals of NASA’s Advanced Composites Project (ACP). A key technical challenge area for accomplishing these goals is the development of rapid composite inspection methods with improved defect characterization capabilities. Ongoing work at NASA Langley is focused on expanding ultrasonic simulation capabilities for composite materials. Simulation tools can be used to guide the development of optimal inspection methods. Custom code based on elastodynamic finite integration technique is currently being used to explore ultrasonic wave interaction with manufacturing defects, such as in-plane fiber waviness (marcelling). This presentation will describe details of recent validation comparisons performed prior to simulating guided wave propagation in composites containing fiber waviness. Results from simulation based studies of guided wave interaction with fiber waviness, as well as preliminary experimental results, will be discussed. Lastly, the presentation will discuss updates on progress towards optimizing simulation code for improved computational speed.