Experimental investigations of Mode I and Mode II fracture toughness and intralaminar damage of textile composites.

• Autorzy: Constantinescu D.M. , Constantin N. , Goss T.

Warianty tytułu

PL

Badania doświadczalne odporności na kruche pękanie w modach I i II oraz uszkodzeń śródwarstwowych w kompozytach włókienniczych.

• Języki publikacji: EN

Abstrakty

EN

Experimental evaluation on interlaminar and interlaminar fracture of multilayered and sandwich epoxy and polyester fabrics show an interesting behaviour at delamination initiation and crack propagation. Model I and Mode II tests were done on layered specimens with same type of artificial delamination to investigate the material influence on interlaminar fracture toughness and crack propagation. In sandwich specimens with a rigid foam core, the interlaminar damage failure and propagation are monitored.

PL

Badania ekperymentalne pęknięć śródwarstwowych i międzywarstwowych w wielowarstwowych kompozytach włókienniczych epoksydowych i poliestrowych pokazują interesujące zjawiska związane z zapoczątkowaniem procesu rozwarstwienia i rozwojem pęknięć. Testy w Modach I i II zostały wykonane na próbkach wielowarstwowych, przy tym samym typie sztucznego rozwarstwienia, w celu zbadania wpływu materiału na międzywarstwową odporność na kruche pękanie oraz rozwój pęknięć. Uszkodzenia śródwarstwowe i ich rozwój były monitorowane w próbkach wielowarstwowych ze sztywnym rdzeniem piankowym.

Słowa kluczowe

EN

textile composite; fracture toughness; delamination; crack propagation

PL

odporność na pękanie; kompozyt włókienniczy; rozwarstwienie; rozwój pęknięć

• Wydawca: Komitet Budowy Maszyn PAN
• Czasopismo: Archive of Mechanical Engineering
• Rocznik: 2004
• Tom: Vol. LI, nr 4
• Strony: 565--579
• Opis fizyczny: Bibliogr. 15 poz., fot., rys.

Twórcy

autor

Constantinescu D.M.

• Department of Strength of Materials. University Politehnica of Bucharest, Splaiul Independentei 313, 060032 Bucharest, Romania

autor

Constantin N.

• Department of Strength of Materials. University Politehnica of Bucharest, Splaiul Independentei 313, 060032 Bucharest, Romania

autor

Goss T.

• Austrian Research Centers, European Large Scale Facility, Aerospace & Space Materials Technology Testhouse, A-2444 Seibersdorf, Austria

Bibliografia

• [1] Mechanical testing of advanced fibre composites. Hodginson J.M., Ed., CRC Press, 2000.
• [2] ASTM D 5528 - 94a, Standard test method for mode I interlaminar fracture toughness of unidirectional fibre-reinforced polymer matrix composites, Annual Book of ASTM Standards, 100 Barr Harbor Drive, West Conshohocken, PA 19428, USA,.Vol. 15.03, 2001.
• [3] O'Brien Т.K.: Interlaminar fracture toughness: the long and winding road to standardisation. Composites-Part B, 1998, Vol. 29, pp. 57-62.
• [4] Japanese Industrial Standard JIS K 7086 - 1993, Testing methods for interlaminar fracture toughness of carbon fibre reinforced plastics, Japanese Standards Association, 1993.
• [5] European Structural Integrity Society (ESIS), Determination of the Mode I Delamination Resistance of Unidirectional Fiber-Reinforced Polymer Laminates Using the Double Cantilever Beam Specimen (DCB), version 99-06-03. Polymers and Composites Task Group, ESIS TC4, 1999.
• [6] European Structural Integrity Society (ESIS), Determination of the Mode II Delamination Resistance of Unidirectional Fiber-Reinforced Polymer Laminates Using the End Loaded Split Specimen (ELS), version 99-12-03. Polymers and Composites Task Group, ESIS TC4, 1999.
• [7] Davies P., Blackman B.R.K., Brunner A.J.: Towards standard fracture and fatigue test methods for composite materials. Proceedings of the 6as Jornadas De Fractura, Sociedade Portuguesa de Materials, Portugal, 1998, pp. 151-167.
• [8] O'Brien Т.K.: Composite interlaminar shear fracture toughness, GIIc: shear measurement of sheer myth? ASTM-STP 1330, American Society for testing and Materials, 1998, pp. 3-18.
• [9] Tamuzs V., Tarasovs S., Vilks U.: Progressive delamination and fiber bridging modelling in double cantilever beam composite specimens. Engineering Fracture Mechanics, 2001, Vol. 68, pp. 513-525.
• [10] Fiber-Reinforced Plastics Composites: Determination of Mode I Interlaminar Fracture Toughness, GIc, For Unidirectionally Reinforced Materials. ISO/DIS 15024, International Organisation of Standardisation, 1999.
• [11] Fracture Mechanics Testing Methods for Polymers, Adhesives and Composites, Eds. D.R. Moore, A. Pavan, and J.G. Williams. ESIS Publication 28, Elsevier, 2001.
• [12] Robinson P., Song D.Q.: A modified DCB specimen for mode I testing of multi-directional laminates. Journal of Composite Materials, 1992, Vol. 26, pp. 1554-1577.
• [13] Moura M.F., Pereira A.B., Morais A.B.: Influence of intralaminar cracking on the apparent interlaminar mode I toughness of cross-ply laminates. Fatigue and Fracture of Engineeering Materials and Structures, 2004 (in print).
• [14] Thamm, F, Borbas, L, Gati, R, Gal, J.: Investigations of interlaminar strength of corners of laminated parts. Proceedings of the 12th Danubia-Adria Symposium on Experimental Methods in Solid Mechanics, October 5-7, Sopron, Hungary, 1995, pp. 95-96.
• [15] Constantinescu D.M., Constantin N., Goss Т.: Experimental evaluation of mode I and mode II interlaminar fracture toughness of textile composites. Proceedings of the 20th Danubia-Adria Symposium on Experimental Methods in Solid Mechanics, September 24-27, Györ, Scientific Society of Mechanical Engineering, ISBN 963 9058 20 3, Hungary, 2003, pp. 82-83.