Energy Absorption Behavior of Double-Chamfer Triggered Glass/Epoxy Circular Tubes

The effects of double-chamfer triggered pattern to the axial crushing energy absorption behavior of glass/epoxy circular tubes with the ply pattern of [±θ]n is reported. Deliberate weakness of 45 chamfered triggers at both ends of the tube is introduced with the aim of controlling the crushing performance. Similar to single-chamfer triggered pattern, application of this trigger pattern is an efficient way to weaken the initial peak load P cr, extend the triggering length L tr, reduce the probability of catastrophic failure and avoid unstable crushing. The crushing behaviors, the damage characteristics of untriggered, single-chamfer triggered and double-chamfer triggered tubes were studied in detail. Specific crushing stress was used to measure the energy absorption for tubes of different winding angles. Investigations on the macroscopic collapse mode of the tube, the effects of ply angle, the effect of impact loading and quasi-static loading were performed in the presence of double-chamfer triggers.

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

[2]  P. H. Thornton,et al.  Energy Absorption in Composite Structures , 1979 .

[3]  Gary L. Farley.  Relationship between mechanical-property and energy-absorption trends for composite tubes , 1992 .

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

[5]  G. L. Viegelahn,et al.  Crashworthy Behaviour of Thin-Walled Tubes of Fibreglass Composite Materials Subjected to Axial Loading , 1990 .

[6]  R. E. Robertson,et al.  Comparison of bevel and tulip triggered pultruded tubes for energy absorption , 1991 .

[7]  P. H. Thornton,et al.  Energy Absorption in Composite Tubes , 1982 .

[8]  Hongwei Song,et al.  Axial impact behavior and energy absorption efficiency of composite wrapped metal tubes , 2000 .

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

[10]  H.G.S.J. Thuis,et al.  The influence of trigger configurations and laminate lay-up on the failure mode of composite crush cylinders , 1993 .

[11]  Maciej Kumosa,et al.  Trigger mechanisms in energy-absorbing glass cloth/epoxy tubes , 1991 .

[12]  M. B. Ioannidis,et al.  Crashworthiness of Composite Thin-Walled Structures , 1998 .

[13]  Seeram Ramakrishna,et al.  Energy Absorption Characteristics of Crash Worthy Structural Composite Materials , 1997 .

[14]  Anthony J. Vizzini,et al.  The Effect of Side Loads on the Energy Absorption of Composite Structures , 1992 .