NASA Spring Back Study_1994

Click here to load reader

  • date post

    30-Aug-2014
  • Category

    Documents

  • view

    26
  • download

    0

Embed Size (px)

Transcript of NASA Spring Back Study_1994

NASA/TM-

97-206310

Investigation Composite

of Springback MaterialDiscretionary

AssociatedFund

With

Component

FabricationFinal Report,

(MSFC Center Director's Project 94-09)M.A. Benzie Space Flight Center, Marshall Marshall

Space

Flight

Center,

Alabama

November

1997

The NASA

STI Program

Office...in

Profile

Since its founding, NASA has been dedicated the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program Office plays a key this important part in helping role. NASA maintain

to

CONFERENCE

PUBLICATION.

Collected

papers from scientific and technical conferences, symposia, seminars, or other meetings sponsored or cosponsored by NASA. SPECIAL or historical PUBLICATION. Scientific, technical,

information from NASA programs,

The NASA STI Program Langley NASA's

Office is operated

by

Research Center, the lead center for scientific and technical information. The

projects, and mission, often concerned with subjects having substantial public interest. TECHNICAL TRANSLATION.

NASA STI Program Office provides access to the NASA STI Database, the largest collection of aeronautical and space science STI in the world. The Program Office is also NASA's institutional mechanism for disseminating the results of its research and development activities. These results are published by NASA in the NASA STI Report Series, which includes the following report types: TECHNICAL PUBLICATION. Reports of completed research or a major significant phase of research that present the results of NASA programs and include extensive data or theoretical analysis. Includes compilations of significant scientific and technical data and information deemed to be of continuing reference value. NASA's counterpart of peer-reviewed formal professional papers but has less stringent limitations on manuscript length and extent of graphic presentations. TECHNICAL MEMORANDUM. Scientific and technical findings that are preliminary or of specialized interest, e.g., quick release reports, working minimal analysis. CONTRACTOR contractors REPORT. Scientific and papers, and bibliographies that contain annotation. Does not contain extensive

English-language translations of foreign scientific and technical material pertinent to NASA's mission. Specialized services that complement the STI Program Office's diverse offerings include creating custom thesauri, building customized databases, organizing and publishing research results...even providing videos. about the NASA STI Program

For more information

Office, see the following: Access the NASA STI Program Home Page at http ://www.sti.nasa.gov E-mail your question [email protected] via the Internet to

Fax your question to the NASA Access Help Desk at (301) 621-0134 Telephone 621-0390 Write to: NASA Access Help Desk NASA Center for AeroSpace Information 800 Elkridge Landing Road Linthicum Heights, MD 21090-2934 the NASA Access Help Desk at (301)

technical findings by NASA-sponsored and grantees.

NASA/TM-97-206310

Investigation Composite

of Springback MaterialDiscretionary

AssociatedFund

With

Component

FabricationFinal Report,

(MSFC Center Director's Project 94-09)M.A. Benzie Space Flight Center, Marshall Marshall

Space

Flight

Center,

Alabama

National Space Marshall

Aeronautics Administration Space Flight

and

Center

November

1997

=

Available

from:

NASA Center for AeroSpace Information 800 Elkridge Landing Road Linthicum Heights, MD 21090-2934 (301 ) 621-0390

National

Technical

Information

Service

5285 Port Royal Road Springfield, VA 2216 I (703) 487-4650

ii

TABLE

OF CONTENTS

1. INTRODUCTION 2. EXPERIMENTAL

.................................................................................................................... APPROACH ..............................................................................................

1 2

2.1 2.2 2.3 2.4 2.5 2.6 2.8

Taguchi Material Tooling Design

Designed Selection

Experiment .......................................................................................... ............................................................................................................. ...................................................................................................... ......................................................................................................

2 4 6 7 7 8 10 12 14 14 16 18 22 24 27 28 29

Configuration Considerations

Bagging Procedures .......................................................................................................... Part Fabrication ................................................................................................................ Collection ................................................................................................................. Experiment OF RESULTS Problems Data ................................................................................................. ................................................................................................... Confirmation

2.7 Data

3. DISCUSSION 3.1 Fabrication 3.2 Experimental

........................................................................................................ ............................................................................................................

3.3 Taguchi Analysis of the Data ............................................................................................ 3.4 Discussion of the Factors .................................................................................................. 3.5 Confirmation Experiment ................................................................................................. ...................................................................

4. CONCLUSIONS REFERENCES APPENDIX

AND RECOMMENDATIONS

.............................................................................................................................. ...................................................................................................................................

iii

LIST

OF FIGURES

Different Standard Basic Bagged Autoclave Oven

tooling

angles

as shown configuration stackup

on male tools .............................................................. ................................................................................

3 7 9 9 11 l1 12 -.............. 13 13 15 15 17

2.

male tooling bagging

,

vacuum

.........................................................................................

4. 5. 6. 7. 8. 9. 10. 11. 12.

part ready

for cure ............................................................................................... ..........................................................................................

used for processing

used for processing

................................................................................................. ............................................................................................ .............................................................................. diagram .............................................................................. ............................................................................. tooling during layup ..........................................

Tool measurement Part measurement Data point location female

procedure procedure mapping

Standard Closeup Summary

tooling

configuration in female

of bridging springback

problem

data versus

run number

..................................................................

LIST

OF TABLES

L I2 orthogonal Summary Epoxy Bagging Summary Relative

array Taguchi and levels selection

test matrix

........................................................................ ................................................................

3 4 5 8 16 17 19 20 20 21 25 25 26 29 29 30 30 30 31 31 31 32 32 32 33 33

2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26.

of factors

for experiment summary

resin material materials springback springback

......................................................................... ..................................................................

used for entire data rankings summary

test matrix

............................................................................................... (l=lowest) ........................................................................

S/N ratio calculation S/N response Mean Control ANOVA ANOVA response factor table table

........................................................................................

........................................................................................................... ........................................................................................................ ................................................................................................... matrix ............................