Experimental Investigations on Deformation and Fracture Behavior of Glass Sphere Filled Epoxy Functionally Graded Materials
Source abstract
Abstract
In this paper, deformation and fracture behavior of glass sphere filled epoxy functionally graded materials (FGM) are numerically evaluated and experimentally studied. The fabrication of the FGM is described in detail, and the spatial gradation of elastic modulus and the microscopic structure in FGM are measured and analyzed. The deformation and fracture characterization of the FGM specimen with a crack oriented along the direction of the elastic gradient under three point bend are studied by the experimental and the finite element method. The influences of crack location at both the stiff and the compliant sides of the FGM specimen on crack initiation, deformation field and stress intensity factor are analyzed. The results are: (a) The neutral-axis in the FGM specimen under three-point-bending will shift toward the stiffer side; (b) The initial fracture load increases with the increase of elastic modulus at the crack tip; (c) The elastic gradients shield a crack on the compliant side and lower the stress intensity factor when compared to the one with crack on the stiff side. These results will be useful for better design and reliable evaluation of FGM.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Mechanical Behavior of Composites · Composite Structure Analysis and Optimization · Optical measurement and interference techniques
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References (22)
Show source-provided references
1. Ilschner, B.: Processing–microstructure–property relationships in graded materials. J. Mech. Phys. Solids 44(5), 647–656 (1996)10.1016/0022-5096(96)00023-3 ↗
2. Li, H., Lambros, J., Cheeseman, B.A., Santare, M.H.: Experimental investigation of the quasi-static fracture of functionally graded materials. Int. J. Solids Struct. 37(27), 3715–3732 (2000)10.1016/S0020-7683(99)00056-6 ↗
3. Gu, P., Asaro, R.J.: Cracks in functionally graded materials. Int. J. Solids Struct. 34(1), 1–17 (1997)10.1016/0020-7683(95)00289-8 ↗
4. Marur, P.R., Tippur, H.V.: Numerical analysis of crack-tip fields in functionally graded materials with a crack normal to the elastic gradient. Int. J. Solids Struct. 37(38), 5353–5370 (2000)10.1016/S0020-7683(99)00207-3 ↗
5. Delale, F., Erdogan, F.: The crack problem for a non-homogeneous plane. ASME J. Appl. Mech. 50(5), 609–614 (1983)10.1115/1.3167098 ↗
6. Eischen, J.W.: Fracture of non-homogenous materials. Int. J. Fract. 34(1), 3–22 (1987)10.1007/BF00042121 ↗
7. Jin, Z.-H., Noda, N.: Crack tip singular fields in non-homogenous materials. ASME J. Appl. Mech. 61(6), 738–740 (1994)10.1115/1.2901529 ↗
8. Jin, Z.-H., Batra, R.C.: Some basic fracture mechanics concepts in functionally graded materials. J. Mech. Phys. Solids 44(8), 1221–1235 (1996)10.1016/0022-5096(96)00041-5 ↗
9. Erdogan, F.: Fracture mechanics of functionally graded materials. Compos. Eng. 5(7), 753–770 (1995)10.1016/0961-9526(95)00029-M ↗
10. Paulino, G.H., Jin, Z.H.: Correspondence principle in viscoelastic functionally graded materials. ASME J. Appl. Mech. 68, 129–132 (2001)10.1115/1.1331286 ↗
11. Shim, D.J., Paulino, G.H., Dodds Jr, R.H.: Effect of material gradation on K-dominance of fracture specimens. Eng. Fract. Mech. 73, 643–648 (2006)10.1016/j.engfracmech.2005.09.004 ↗
12. Guo, L.C., Wu, L.Z., Zeng, T., Ma, L.: Mode I crack problem for a functionally graded orthotropic strip. Eur. J. Mech. A, Solids 23(2), 219–234 (2004)10.1016/j.euromechsol.2003.12.006 ↗
13. Guo, L.C., Wu, L.Z., Sun, Y.G., Ma, L.: The transient fracture behavior for a functionally graded layered structure subjected to an in-plane impact load. Acta Mech. Sin. 21(3), 257–266 (2005)10.1007/s10409-005-0035-9 ↗
14. Abanto-Bueno, J., Lambros, J.: Investigation of crack growth in functionally graded materials using digital image correlation. Eng. Fract. Mech. 69(14–16), 1695–1711 (2002)10.1016/S0013-7944(02)00058-9 ↗
15. Rousseau, C.E., Tippur, H.V.: Influence of elastic variations on crack initiation in functionally graded glass-filled epoxy. Eng. Fract. Mech. 69(14–16), 1679–1693 (2002)10.1016/S0013-7944(02)00056-5 ↗
16. Rousseau, C.E., Tippur, H.V.: Compositionally graded materials with cracks normal to the elastic gradient. Acta Mater. 48(16), 4021–4033 (2000)10.1016/S1359-6454(00)00202-0 ↗
17. Butcher, R.J., Rousseau, C.E., Tippur, H.V.: A functionally graded particulate composite: preparation, measurements and failure analysis. Acta Mater. 47(1), 259–268 (1998)10.1016/S1359-6454(98)00305-X ↗
18. Yao, X.F., Yeh, H.Y.: Visualization of crack tip behavior in functionally gradient material using Coherent Gradient Sensing (CGS). Model. Simul. Mater. Sci. Eng. 13(1), 1–12 (2005)10.1088/0965-0393/13/1/001 ↗
19. Chu, T.C., Ranson, W.F., Sutton, M.A., Peters, W.H.: Application of digital image correlation techniques to experimental mechanics. Exp. Mech. 25(2), 232–245 (1985)10.1007/BF02325092 ↗
20. Jin, G.C., Wu, Z., Bao, N.K., Yao, X.F.: Digital speckle correlation method with compensation technique for strain field measurements. Opt. Lasers Eng. 39(4), 457–464 (2003)10.1016/S0143-8166(02)00028-3 ↗
21. Yao, X.F., Meng, L.B., Jin, G.C., Yeh, H.Y.: Full-field deformation measurement of fiber composite pressure vessel using digital speckle correlation method. Polym. Test. 24(2), 245–251 (2005)10.1016/j.polymertesting.2004.05.009 ↗
22. Dally, J.W., Sanford, R.J.: Strain-gage methods for measuring the opening-mode stress-intensity factor, K I . Exp. Mech. 27(4), 381–388 (1987)10.1007/BF02330311 ↗