Sage Journals: Discover world-class research

Abstract

Impact of tubes has an extensive application in crashworthiness. Analytical and numerical studies on axial impact of tubes have been carried out mostly at low-to-moderate impact velocities at which only the buckling of tubes is observed. However, experimental observations show that tubes fracture when the impact velocity is high. The objective of this article is to study the fracture of cylindrical tubes impacted against a rigid surface by numerical simulation. First, through-the-thickness fracture at the impacted end is simulated at the impact velocity of 350 m/s. Then, a detailed parametric study is carried out with respect to various parameters like the friction coefficient, tube thickness, tube length, and impact velocity. With an increase in the friction coefficient, the spread of fracture is more toward the outer edge. Further, the spread of fracture toward the inner edge takes place in an inclined manner. At higher tube thickness, the spread of fracture ceases after some time without reaching the inner edge. The tube length is found to have no effect on the fracture. It is observed that the fracture spreads faster with the impact velocity.

Keywords

tube ductile fracture continuum damage mechanics

Get full access to this article

View all access options for this article.

References

Bao

Wierzbicki

(2005). On the Cut-off Value of Negative Triaxiality for Fracture, Engineering Fracture Mechanics, 72: 1049–1069.

Bathe

(1996). Finite Element Procedures, New Delhi, Prentice Hall of India.

Farren

Taylor

(1925). The Heat Developed During Plastic Extension of Metal, Proceedings of Royal Society of London. Series A, 107: 422–451.

Galib

Limam

(2004). Experimental and Numerical Investigation of Static and Dynamic Axial Crushing of Circular Aluminum Tubes, Thin Walled Structures, 42: 1103–1137.

Galib

Limam

Combescure

(2006). Influence of Damage on the Prediction of Axial Crushing Behavior of Thin-walled Aluminum Extruded Tubes, International Journal of Crashworthiness, 11: 1–12.

Gao

Wagoner

(1991). A Simplified Model of Heat Generation During the Uniaxial Tensile Test, Metallurgical Transactions A, 18A: 1001–1009.

Gautam

Babu

Dixit

(2010). Ductile Fracture Simulation in the Taylor Rod Impact Test Using Continuum Damage Mechanics, International Journal of Damage Mechanics, (doi: 10.1177/1056789509357119).

Gautam

Dixit

(2010). Ductile Failure Simulation in Spherodized Steel Using Continuum Damage Mechanics Coupled Finite Element Formulation, International Journal of Computational Methods, 7: 319–348.

Jaspers

SPFC

Dautzenberg

(2002). Material Behavior in Conditions Similar to Metal Cutting: Flow Stress in the Primary Shear Zone, Journal of Materials Processing Technology, 122: 322–330.

10.

Johnson

Cook

(1985). Fracture Characteristics of Three Metals Subjected to Various Strains, Strain Rates, Temperatures and Pressures, Engineering Fracture Mechanics, 21: 31–48.

11.

Jones

(1989). Structural Impact, Cambridge, Cambridge University Press.

12.

Karagiozova

Alves

Jones

(2000). Inertia Effects in Axisymmetrically Deformed Cylindrical Shells Under Axial Impact, International Journal of Impact Engineering, 24: 1083–1115.

13.

Karagiozova

Jones

(2001). Dynamic Effects on Buckling and Energy Absorption of Cylindrical Shells Under Axial Impact, Thin Walled Structure, 39: 583–610.

14.

Lemaitre

(1985). A Continuous Damage Mechanics Model For Ductile Fracture, Transactions of ASME: Journal of Engineering Materials and Technology, 107: 83–89.

15.

LeRoy

Embury

Edward

Ashby

(1981). A Model of Ductile Fracture Based on The Nucleation and Growth of Voids, Acta Metallurgica, 29: 1509–1522.

16.

Lin

(1990). An Investigation of a Coupled Analysis of a Thermo-elasticplastic Model During Warm Upsetting, International Journal of Machine Tools and Manufacture, 30: 599–612.

17.

Tarigopula

Langseth

Hopperstad

Clausen

(2006). Axial Crushing of Thin-walled High-strength Steel Sections, International Journal of Impact Engineering, 32: 847–882.

18.

Varadhan, S.N. (1997) Dynamic Large Deformation Elasto-plastic Analysis of Continua, Master's Thesis, Department of Mechanical Engineering, IIT Kanpur.

19.

Wang

(2002). Mushrooming of Circular Tubes Under Dynamic Axial Loading, Thin Walled Structure, 40: 167–182.

20.

Xing

Makinouchi

(2002). FE Modeling of Thermo-elasto-plastic Finite Deformation and its Application in Sheet Warm Forming, Engineering Computations, 19: 392–410.

21.

Zhong

(1993). Finite Element Procedures for Contact-Impact Problems, Oxford, Oxford University Press.

Numerical Simulation of Ductile Fracture in Cylindrical Tube Impacted Against a Rigid Surface

Abstract

Keywords

Get full access to this article

References