PROPERTIES OF FIBERGLASS-

1 AFWAL-TR-82-401 3 MECHANICAL PROPERTIES OF E293/1581 FIBERGLASS- EPOXY composite AND OF SEVERAL ADHESIVE SYSTEMSD. C. WatsonMaterials Integrity BranchSystems Support DivisionMay 1982 Final Report for Period June 1980 -September 1981 Approved for public release; distribution ') EL-ECTILL .,AU8 0 5 1982 MATERIALS LABORATORYAIR FORCE WRIGHT AERONAUTICAL LABORATORIESAIR FORCE SYSTEMS COMMANDWRIGHT-PATTERSON AIR FORCE BASE, OHIO 45433 EES2 08 05 012 NOT ICEWhen Government drawings, specifications, or other data are usedfor any purpose other than in connection with a definitely relatedGovernment p --curemnent operation, the United States Government therebyincurs no re, )onsibility nor any obligation whatsoever; and the fact thatthe qv r'iment !

2 Y have formulated, furnished, or in any way supplied thesa, oy,,winis, specification, or other data, is not to be regarded by,'Y;licatfor, or otherwise as in any manner licensing the holder or anyotner pei >un or corporation, or conveying any rights or permission tomanufacture, use, or sell any patented invention that may in any way berelated report has been reviewed by the Office of Public Affairs (ASD/PA)and is releasable to the National Technical Information Service (NTIS). AtNTIS, it will be available to the general public, including foreign technical report has been reviewed and is approved for ~ Va _____DAID- SON CLA4 ON and Design Data Technical ManagerMaterials Integrity Branch Enaineering and Design DataMaterials Integrity BranchFOR THE COMMANDER:T.

3 D. COOPER, ChiefMaterials n grity BranchSystems Support Division"if your address has changed, if you wish to be removed from our mailinglist, or if the is no longer employed by your organization, pleasenotify AFWAL/MLSA, W-PAFB, OH 45433 to help us maintain a current mailing list."Copies of this report should not be returned unless return is required bysecurity considerations, contractual obligations, or notice on a FI EDSECURITY CLASSIFICATION OF THIS PAGE (When Data.' Entered),REPORT DOCUMENTATION PAGE READ INSTRUCTIONSN PBEFORE COMPLETING FORMI. REPORT NUMBER t2 GOVT ACCESSION NO.

4 3. RECIPIENT'S CATALOG NUMBERAFWAL-TR-82-401 3 R 1//71709 I4. TITLE (and Subtitle) 5. TYPE OF REPORT & PERIOD COVEREDMECHANICAL PROPERTIES OF E293/1581 FIBERGLASS- Final ReportEPOXY composite AND OF SEVERAL ADHESIVE SYSTEMS June 1980 -September 19816. PERFORMING ORG. REPORT NUMBER7. AUTHOR(@) 8. CONTRACT OR GRANT NUMBER(sOD. C. Watson9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. PROGRAM ELEMENT, PROJECT, TASKM aterials Laboratory (AFWAL/MLSA) Project 2418 Air Force Wright Aeronautical Laboratories (AFSC) Task 241807 Wright-Patterson AFB, Ohio 45433 Work Unit 24180703I I. CONTROLLING OFFICE NAME AND ADDRESS 12.)

5 REPORT DATEM aterials Laboratory (AFWAL/ML) May 1982 Air Force Wright Aeronautical Laboratories (AFSC) 13. NUMBER OF PAGESW right-Patterson AFB, Ohio 45433 5214, MONITORING AGENCY NAME & ADDRESS(if different from Controlling Office) 15. SECURITY CLASS. (of this report)UNCLASSIFIED15a. DECL ASSI FI CATION," DOWN GR ADINGSCHEDULE16. DISTRIBUTION STATEMENT (of this Report)Approved for public release; distribution *17. DISTRIBUTION STATEMENT (of ihe abstract entered in Block 20, if different from Report)I8. SUPPLEMENTARY NOTES19. KEY WORDS (Continue on reverse side If necessary and Idenlify by block number)Mechanical PROPERTIES AdhesivesFiberglass-Epoxy composite TensileFiberglass Woven Fabric FlexureEpoxy Matrix Interlaminar ShearSingle Lap Shear0.

6 ABSTRACT (Continue on reverse side it necessary and Identify by block number)Mechanical PROPERTIES have been generated on E293/1581 FIBERGLASS- epoxycomposite and several different adhesive systems. Three flat panels ofthis composite were supplied. Several panels having adhesive joints werealso supplied having the E293/E-glass fabric composite laminates bonded;to itself, to steel, and to aluminum honeycomb material. Several typesof adhesives, both film and foam adhesives, were used in bonding the singlelap joint panels and the composite -honeycomb sandwich panel. Tensile, flexure,DD 1473 EDITION OF I NOV 6 IS OBSOLETE UNCLASSIFIEDSECURITY CLASSIFICATION OF THIS PAGE ("i,-n Date Entered)UNCLASSIFIEDSECURITY CLASSIFICATION OF THIS PAGE(Whan Date Enterd)Block 20 (Continued){.}

7 And interlaminar shear da'ta were obtained on specimens removed from the flatpanels paraliel to the warp fabric direction and at room temperature and280OF (138 C). Single lap shear tests were conducted on specimens removed fromthe adhesively bonded panels. Three point flexure and edgewise compression testswere conducted on specimens removed from the composite -aluminum honeycombsandwich FIEDSECURITY CLASSIFICATIO OF T-' PAGE(When Data Entered)AFWAL-TR-82-401 3 PREFACEThis report was prepared by the Materials Integrity Branch (AFWAL/MLSA), Systems Support Division, Materials Laboratory, Air Force WrightAeronautical Laboratories, Wright-Patterson Air Force Base, Ohio, underProject 2418, "Aerospace Structural Materials," Task 241807, "SystemsSupport," Work Unit 24180703, "Engineering & Design Data.

8 "The work reported herein was performed during the period June 1980 toSeptember 1981, under the direction of the author, David C. Watson (AFWAL/MLSA), materials engineer. The report was released by the author inDecember 1 author wishes to acknowledge the following people for technicalassistance: mechanical property testing -Ms. Lemmon, co-op student fromWright State University, and Messrs. Ruschau, Eblin and Marton of theUniversity of Dayton; physical property determination -Mr. McKiernan ofthe University of Dayton; and nondestructive evaluation of bonded panels -Mr. Tracy of Universal Technology !

9 Fl ForDi tr! L't ; ow /or ricDi L C i a COPYI 2! iiiAFWAL-TR-82-401 3 TABLE OF CONTENTSSECTION PAGEI BACKGROUND 1II TEST PROGRAM AND PROCEDURES 21. Material 22. Specimen Geometry and Test Procedures 6 III RESULTS AND DISCUSSION 111. Fiberglass/Epoxy Panels 112. Adhesively Bonded Panels 18IV CONCLUSIONS 22 APPENDIX A -E Glass Fiber/E-293 Epoxy Laminateand Adhesive Bond Panels FabricationProcedures and Test SpecimenLocation 23 APPENDIX B -Test Data 32 REFERENCES 44 IWIEING 5A BLANK-NOT FiiAmvK AFWAL-TR-82-4l13 LIST OF !LLUSTRATIONSFIGURE PAGEI Typical Cross-Sections of Fabricated Panels 42 Flexural Test Setup for Three Point Loadingof Sandwich Material Specimen3 Edgewise Compression Specimen in Test Apparatus 94 Tensile Stress-Strain Curves for E293/1581 Fiberglass Epoxy.

10 Warp Direction 15IA Test Specimen Location in 18" by 18" Panels 282A Test Specimen Location in Fiberglass Compositeto composite Lap Shear Bond Panels 293A Test Specimen Location in Fiberglass Compositeto Steel Lap Shear Bond Panels B201, B202, B2U3,B204, B205, B206, B207, B208 304A Test Specimen Location in Fiberglass Compositeto Aluminum Honeycomb Core Adhesive Bonded Panel 31v iAFWAL-TR-82-401 3 LIST OF TABLESTABLE PAGE1 Physical PROPERTIES Data 32 Statistical Analysis Results 133 Summary of the Combined Test Results onE293/1 581 Fiberglass/Epoxy 14B-l Tensile Test Results in Room Temperature,Laboratory Air 33B-2 Tensile Test Results at 280 F (138 C) 34B-3 Flexural Test Results 35B-4 Apparent Interlaminar Shear Test Results inRoom Temperature, Laboratory Air 36B-5 Apparent Interlaminar Shear Test Resultsat 280 F (138 C)