Article citationsMore>>

B. A. Gama, S. M. W. Islam, M. Rahman, J. W. Gillespie Jr., T. A. Bogetti, B. A. Cheeseman, C. Yen and C. P. R. Hoppel, “Punch Shear Behavior of Thick-Section Composites under Quasi-Static, Low Velocity, and Ballistic Impact Loading,” SAMPE Journal, Vol. 41, No. 4, 2005, pp. 6-13.

has been cited by the following article:

• TITLE: Energy Absorption of Nano-Reinforced and Sandwich Composites in Ballistic and Low-Velocity Punch-Shear

  AUTHORS: Brahmananda Pramanik, P. Raju Mantena

  KEYWORDS: Energy Absorption, Tortuosity; Ballistic; Punch-Shear; Nanocomposites; Sandwich Composites

  JOURNAL NAME: Open Journal of Composite Materials, Vol.2 No.3, July 24, 2012

  ABSTRACT: This paper presents an investigation on energy absorption characteristics of nano-reinforced panels, laminated face sheets and sandwich composites in high velocity ballistic and low velocity punch-shear experiments. The vinyl ester panels were reinforced with 1.25 and 2.5 wt. percent nanoclay and exfoliated graphite platelets. Three different face sheets were manufactured with E-glass, Owens Corning HP ShieldStrand? glass and T-700 Carbon woven fabric in vinyl ester; and one with the E-glass and graphite platelets impregnated vinyl ester matrix. The sandwich composites were fabricated with balsa, PVC foam, 3D-fiber reinforced Tycor? and fire resistant fly-ash based Eco-Core? cores in between E-glass/vinyl ester face sheets. Ballistic tests were conducted according to NIJ level III using a universal receiver equipped with a barrel to launch 0.308 caliber M80 ball round projectile at about 890 m/s. Low velocity punch-shear tests were performed at around 3 m/s according to ASTM D3763 Standard using a drop-weight impact test system. The tortuosity of the fractured surface in nanocomposite specimens has been investigated using digital microscope. In ballistic tests, the 3-D fiber reinforced Tycor? core provided the most resistance when projectile strikes at the web-flange interface region. The 2.5 wt. pct. graphite platelet reinforced nanocomposite, HP ShieldStrand? glass vinyl ester face sheets, and E-glass/Eco-Core? sandwich composite showed the best energy absorption under low velocity punch-shear.