0
TECHNICAL PAPERS

Low-Velocity Impact Response Characterization of a Hybrid Titanium Composite Laminate

[+] Author and Article Information
S. Bernhardt, A. S. Kobayashi

Department of Mechanical Engineering,  University of Washington, Seattle, WA 98195

M. Ramulu

Department of Mechanical Engineering,  University of Washington, Seattle, WA 98195ramulum@u.washington.edu

J. Eng. Mater. Technol 129(2), 220-226 (Jul 13, 2006) (7 pages) doi:10.1115/1.2400272 History: Received November 28, 2005; Revised July 13, 2006

The low-velocity impact response of a hybrid titanium composite laminate, known as TiGr, was compared to that of graphite/epoxy composite. The TiGr material comprised of two outer plies of titanium foil surrounding a composite core. The composite core was PIXA-M (a high temperature thermoplastic) reinforced by IM-6 graphite fibers and consolidated by an induction heating process. The impact response of TiGr was characterized by two modes of failure which differed by failure or nonfailure in tension of the bottom titanium ply. The ductility of titanium caused buckling by yielding whereas the brittle adjacent composite ply lead to fracture. The maximum failure force of the material correlated well with the previously reported static flexural data, and the material outperformed the commonly used graphite/epoxy.

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic of the TiGr laminate studied

Grahic Jump Location
Figure 2

SEM micrographs of tested materials

Grahic Jump Location
Figure 3

Schematic of instrumented drop weight apparatus

Grahic Jump Location
Figure 4

TiGr, force versus time curves

Grahic Jump Location
Figure 5

TiGr, force versus displacement curves

Grahic Jump Location
Figure 6

Gr/Ep, force versus time curves

Grahic Jump Location
Figure 7

Gr/Ep, force versus displacement curves

Grahic Jump Location
Figure 8

First mode of TiGr failure, center of edge after impact, specimen D2 shown

Grahic Jump Location
Figure 9

Second mode of TiGr failure, center of edge after impact. Specimen DB2 shown.

Grahic Jump Location
Figure 10

Typical post-impact micrograph of Gr/Ep specimen at location of impact

Grahic Jump Location
Figure 11

Static force displacement response of TiGr with bottom Ti-ply failure (8)

Grahic Jump Location
Figure 12

Fractured edge for both static and dynamic three-point bend loading of TiGr

Grahic Jump Location
Figure 13

Average maximum force and failure energy for TiGr and Gr/Ep

Grahic Jump Location
Figure 14

Schematic of failed specimens and normalized damage zone

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In