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Crack propagation in mixed mode in wood: a new specimen

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Summary

For studies on wood structures it is important to have a reliable specimen for mixed mode loading (I+II) of a crack. A new type of specimen derived from the compact tension shear (CTS) specimen proposed by Richard for isotropic materials has been studied. A finite element modelization for pine (Pinus pinaster) gives calibrations in the RL, TL and TR directions. Fracture experiments show a fair agreement between stress intensity factors obtained by calibrations and by the compliance method.

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References

  • Banks-Sills, L.; Arcan, M.; Bortman, Y. 1984: A mixed mode fracture specimen for mode II dominant deformation. Eng. Fract. Mech. 20:145–157

    Google Scholar 

  • Barret, J. D.; Foschi, R. O. 1977: Mode II stress-intensity factors for cracked wood beams. Eng. Fract. Mech. 9:371–378

    Google Scholar 

  • Barsoum, R. S. 1977: Triangle quarter point elements as elastic and perfectly plastic crack tip elements. Int. J. Num. Meth. Eng. 11:85–98

    Google Scholar 

  • Chow, C. L.; Woo, C. W. 1979: Orthotropic and mixed mode fracture in wood. In: Proceed. 1st Internat. Conf. Wood Fracture. pp 39–52, Vancouver: Forintek

    Google Scholar 

  • Cramer, S. M.; Pugel, A. D. 1987: Compact shear specimen for wood mode II fracture investigation. Int. J. of Fract. 35:163–174

    Google Scholar 

  • Johnson, J. A. 1973: Crack initiation in wood plates. Wood Sci. 6:151–158

    Google Scholar 

  • Jones, D. L. 1975: An investigation of the edge sliding mode in fracture mechanics. Eng. Fract. Mech. 7:261–270

    Google Scholar 

  • Kumosa, M.; Hull, D. 1987: Mixed mode fracture of composites using Iosipescu shear test. Int. J. Fract. 35:83–102

    CAS  Google Scholar 

  • Mall, S.; Murphy, J. F.; Shottafer, J. E. 1983: Criterion for mixed mode fracture in wood. J. Eng. Mech. 109:680–690

    Google Scholar 

  • Richard, H. A. 1983: Examination of brittle fracture criteria for overlapping mode I and mode II loading applied to cracks. In: Sih, Sommer, Dahl (Eds.). Application of fracture mechanics to materials and structures. pp. 309–316, Nijhoff

  • Sih, G. C.; Paris, P. C.; Irwin, G. R. 1965: On crack in rectilinear anisotropic bodies. Int. J. Fract. 1:189–203

    Article  CAS  Google Scholar 

  • Tay, T. E.; Williams J. F.; Jones, R. 1987: Characterisation of pure and mixed mode fracture in composite laminates. Theoret. Appl. Fract. Mech. 7:115–123

    Google Scholar 

  • Triboulot, P.; Jodin, P.; Pluvinage, G. 1982: Mesure des facteurs d'intensité de contrainte critiques et des taux de restitution d'énergie dans le bois sur éprouvettes entaillées Ann. Sci. For. 39:63–76

    Google Scholar 

  • Valentin, G. H.; Morlier, P. 1981: Toughness of timber: experimental determination of KIC, KIIC and JC. 5th Intern. Conf. Fract. Paper 249, Cannes, France

  • Valentin, G. H.; Caumes, P. 1986: Propagation de fissure de cisaillement dans le bois. Cahiers Sci. Centre Technique Forestier Tropical 8:181–197

    Google Scholar 

  • Walsh, P. F. 1972: Linear fracture mechanics in orthotropic materials. Eng. Frac. Mech. 4:533–541

    Article  Google Scholar 

  • Williams, J. G.; Birch, M. W. 1976: Mixed mode fracture in anisotropic media. In: ASTM STP 601 Cracks and Fracture, pp. 125–137

  • Wu, E. M. 1967. Application of fracture mechanics to anisotropic plates. J. Appl. Mech. 34:967–974

    Google Scholar 

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Valentin, G., Caumes, P. Crack propagation in mixed mode in wood: a new specimen. Wood Sci.Technol. 23, 43–53 (1989). https://doi.org/10.1007/BF00350606

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