Location

Seattle, WA

Start Date

1-1-1996 12:00 AM

Description

Substantial growth potential for composite materials exists in the private sector, where high-volume, low-cost production is required. Post processing inspection can represent a significant percentage of the cost of composite products. Alternate ways of assuring quality must be examined. In-process inspection can be effectively applied to continuous composite manufacturing techniques such as the pultrusion process. Recent research efforts at the Center for Composite Materials has focused on ways of evaluating pultruded composites on-line by using ultrasonic non-destructive evaluation (NDE) techniques. The most accurate method to date is based upon Lamb wave velocity measurements. This paper focuses on the theoretical analysis used to predict the Lamb wave velocities and compares the results with experimental measurements.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

15B

Chapter

Chapter 5: Engineered Materials

Section

Composite Defects

Pages

1231-1238

DOI

10.1007/978-1-4613-0383-1_160

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Use of Ultrasonic Lamb Waves for In-Process Porosity Inspection of the Pultrusion Process: Theoretical Velocity Calculations

Seattle, WA

Substantial growth potential for composite materials exists in the private sector, where high-volume, low-cost production is required. Post processing inspection can represent a significant percentage of the cost of composite products. Alternate ways of assuring quality must be examined. In-process inspection can be effectively applied to continuous composite manufacturing techniques such as the pultrusion process. Recent research efforts at the Center for Composite Materials has focused on ways of evaluating pultruded composites on-line by using ultrasonic non-destructive evaluation (NDE) techniques. The most accurate method to date is based upon Lamb wave velocity measurements. This paper focuses on the theoretical analysis used to predict the Lamb wave velocities and compares the results with experimental measurements.