Location

Brunswick, ME

Start Date

1-1-1990 12:00 AM

Description

The fabrication and use of composites in thick sections create special needs for flaw detection and characterization which cannot be met by conventional nondestructive evaluation (NDE). Thick composite sections are susceptible to a variety of fabrication defects and in-service damage. Typical fabrication defects include matrix cracking, porosity, delaminations, fiber misalignment and waviness, fiber fractures, and nonuniform matrix distribution (fiber volume ratio). A consequence of fabrication defects is the variation of mechanical properties through the thickness and the buildup of residual stresses. In-service defects result from environmental factors, such as thermal gradients, and mechanical loading, such as impact.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

9B

Chapter

Chapter 7: Engineered Materials

Section

Defects in Composites

Pages

1489-1496

DOI

10.1007/978-1-4684-5772-8_191

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Ultrasonic Characterization of Defects and Damage in Thick Composites

Brunswick, ME

The fabrication and use of composites in thick sections create special needs for flaw detection and characterization which cannot be met by conventional nondestructive evaluation (NDE). Thick composite sections are susceptible to a variety of fabrication defects and in-service damage. Typical fabrication defects include matrix cracking, porosity, delaminations, fiber misalignment and waviness, fiber fractures, and nonuniform matrix distribution (fiber volume ratio). A consequence of fabrication defects is the variation of mechanical properties through the thickness and the buildup of residual stresses. In-service defects result from environmental factors, such as thermal gradients, and mechanical loading, such as impact.