Open Access Open Access  Restricted Access Subscription Access

Relationship between Loss factor and Fracture strength Viscoelastic Materials

Anuradha majumder

Abstract


Fiber-fortified composites are utilized as a part of numerous present applications because of their uniqueness, and the capacity to give distinct properties to fulfill fundamental prerequisites. In the same way as other different materials composites are inclined to imperfections, which may radically debase their material properties. Along these lines, to ensure that imperfections are neither present, nor are sufficiently extreme to trade off execution of the material, fiber-fortified composites ought to be tried both earlier, and amid the life of the segment. Delamination between layers is an imperative issue in uses of fiber strengthened composite overlays. Tests were completed to decide the break strength of composite overlays utilizing blended mode bowing tests, yet this strategy is dangerous. In this study, relationship between vibration damping and break strength in polymeric composite overlaid was reenacted with the goal that Vibration damping test can be utilized as none dangerous test (NDT) to decide crack durability of composites with no harm of test. 


Full Text:

PDF

References


NASA, Structural laminate composites for space application, practices No. PD-ED-1217 P. 1-8.

Garg AC. Delaminations – a damage mode in composite structures. EngFractMech 1988; 29(5):557–84.

O’Brien TK. Mixed-mode strain-energy release rate effects on edge delamination of composites.Effects of defects in composite materials. ASTM STP, vol. 836. American Society for Testing and Materials; 1984. p. 125–142.

O’Brien TK. Composite interlaminar shear fracture toughness, GIIc: shear element or sheer myth? In: Bucinell RB, editor. Composite materials: fatigue and fracture – seventh volume. ASTM STP, vol.1330. American Society for Testing and Materials; 1998. p. 3–18.

Reeder JR, Crews Jr JH. Nonlinear analysis and redesign of the mixed-mode bending delamination test. NASA Technical Memorandum 102777; 1991.

Benzeggagh ML, Kenane M. Measurement of mixed-mode delamination fracture toughness of unidirectional glass/epoxy composites with mixed-mode bending apparatus. Compos Sci Technol1996;56:439–49.

O’Brien TK. Characterization of delamination onset and growth in a composite laminate. In: ReifsniderKL, editor. Damage in composite materials. ASTM STP, vol. 775. American Society for Testing and Materials; 1984. p. 140–67.

Law GE. A mixed-mode fracture analysis of (±25/90n)s graphite/ epoxy composite laminates. Effects of defects in composite materials. ASTM STP, vol. 836. American Society for Testing and Materials;1984. p. 143–160.

Lee SM. Failure mechanisms of edge delaminations of composites. J Compos Mater 1990;24:1200–12.

Gibson.R.F et al, The Use of Nondestructive Damping Measurement to Characterize Interlaminar Fracture Toughness in Composite Laminates, SEM Conference, Maryland, USA, 1994.

Zhao. H, “The use of none destructive damping measurement to characterize interlaminarfracturetoughness in polymer composite materials”, dissertation of doctoral,Wayne State University, 1997.

Mary J. Mathews, Stephen R. Swanson. Characterization of the interlaminar fracture toughness of alaminated carbon/epoxy composite, Composites Science and Technology 67 (2007) 1489–1498.


Refbacks

  • There are currently no refbacks.