Location

La Jolla, CA

Start Date

1-1-1989 12:00 AM

Description

The use of instrumental Nondestructive Evaluation (NDE) techniques to assess the nature of impact damage in composite structures is vital to the repair and maintenance of these structures. Unfortunately, instrumental NDE (as it currently exists) is not capable of revealing the entire characteristic damage state (CDS) of damaged composite structure. The CDS is necessary if a complete restoration of the damaged composite structure is to be achieved [1]. Using instrumental NDE techniques such as ultrasonics and radiography, it is possible to image the CDS to a certain extent. The utilization of ultrasonics to reveal a portion of the CDS of impact damaged composite plates has been described in the literature[2]. Reference [2] is a preliminary attempt to integrate pulse-echo time-of-flight ultrasonics with a meaningful analysis to assess the complete CDS and the post-impact damage tolerance of impacted composite plates. The work from reference [2] has been expanded and the current results exist in references [1], [3], [4], and the work described in this paper. Reference [3] describes in detail the K-rule mechanisms (as they are currently understood) introduced in reference [2].

Volume

8B

Chapter

Chapter 8: Composites

Section

Composites—Defects

Pages

1651-1655

DOI

10.1007/978-1-4613-0817-1_208

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

An Integrated Damage Analysis of Laminated Composite Plates

La Jolla, CA

The use of instrumental Nondestructive Evaluation (NDE) techniques to assess the nature of impact damage in composite structures is vital to the repair and maintenance of these structures. Unfortunately, instrumental NDE (as it currently exists) is not capable of revealing the entire characteristic damage state (CDS) of damaged composite structure. The CDS is necessary if a complete restoration of the damaged composite structure is to be achieved [1]. Using instrumental NDE techniques such as ultrasonics and radiography, it is possible to image the CDS to a certain extent. The utilization of ultrasonics to reveal a portion of the CDS of impact damaged composite plates has been described in the literature[2]. Reference [2] is a preliminary attempt to integrate pulse-echo time-of-flight ultrasonics with a meaningful analysis to assess the complete CDS and the post-impact damage tolerance of impacted composite plates. The work from reference [2] has been expanded and the current results exist in references [1], [3], [4], and the work described in this paper. Reference [3] describes in detail the K-rule mechanisms (as they are currently understood) introduced in reference [2].