Energy absorption and failure response of silk/epoxy composite square tubes: Experimental

This paper focuses on natural silk/epoxy composite square tubes energy absorption and failure response. The tested specimens were featured by a material combination of different lengths and same numbers of natural silk/epoxy composite layers in form of reinforced woven fabric in thermosetting epoxy resin. Tubes were compressed in INSTRON 5567 with a loading capacity of 30 kN. This research investigates the influence of the wall lengths on the compressive response and also failure mode of the tested tubes are analysed. The load–displacement behaviour of square tubes recorded during the test. Since natural woven silk has been used as textile in centuries but due to rare study of this fabric as reinforcement material for composites, the results of this paper can be considerable. Outcomes from this paper might be helpful to guide the design of crashworthy structures.

[1]  P. H. Thornton,et al.  Crash energy management in composite automotive structures , 1988 .

[2]  Abdel Magid Hamouda,et al.  Experimental quasi-static axial crushing of cone–tube–cone composite system , 2003 .

[3]  Michael F. Ashby,et al.  Energy absorption of foam-filled circular tubes with braided composite walls , 2000 .

[4]  Manuel Elices,et al.  Mechanical properties of single‐brin silkworm silk , 2000 .

[5]  D. Hull,et al.  A unified approach to progressive crushing of fibre-reinforced composite tubes , 1991 .

[6]  J. M. Starbuck,et al.  Energy Absorption in Polymer Composites for Automotive Crashworthiness , 2002 .

[7]  R. Wool,et al.  All natural composite sandwich beams for structural applications , 2004 .

[8]  Athanasios G. Mamalis,et al.  Crashworthy capability of composite material structures , 1997 .

[9]  A. Rana,et al.  Short jute fiber reinforced polypropylene composites: effect of compatibiliser, impact modifier and fiber loading , 2003 .

[10]  Elsadig Mahdi,et al.  On the Collapse of Cotton/Epoxy Tubes under Axial Static Loading , 2003 .

[11]  A. S. Mokhtar,et al.  Many aspects to improve damage tolerance of collapsible composite energy absorber devices , 2005 .

[12]  A. Błędzki,et al.  Composites reinforced with cellulose based fibres , 1999 .

[13]  C. Viney,et al.  Evaluating the silk/epoxy interface by means of the Microbond Test , 2000 .

[14]  Gary L. Farley,et al.  Energy Absorption of Composite Materials , 1983 .

[15]  Vladimir Volloch,et al.  Bone morphogenetic protein-2 decorated silk fibroin films induce osteogenic differentiation of human bone marrow stromal cells. , 2004, Journal of biomedical materials research. Part A.

[16]  S. Priya,et al.  Studies on the Mechanical Performance of PMMA Toughened Epoxy–Silk and PC Toughened Epoxy–Silk Fabric Composites , 2005 .

[17]  G. Freddi,et al.  Biodegradation of Bombyx mori silk fibroin fibers and films , 2004 .

[18]  José Daniel D. Melo,et al.  The effect of processing conditions on the energy absorption capability of composite tubes , 2008 .

[19]  Tongxi Yu,et al.  Energy absorption of an axially crushed square tube with a buckling initiator , 2009 .

[20]  A. A. Singace.  Axial crushing analysis of tubes deforming in the multi-lobe mode , 1999 .

[21]  G. L. Farley,et al.  Crushing Characteristics of Continuous Fiber-Reinforced Composite Tubes , 1992 .

[22]  Gary L. Farley,et al.  Effect of Specimen Geometry on the Energy Absorption Capability of Composite Materials , 1986 .