Measurement of Elastic Properties Related to the R-Curve-Behavior of Ceramics(Ceramics & Rocks 1)

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概要

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• We measured the reduction of the elastic modulus due to material damage in Al_2O3-and SiC/TiB_2- ceramics occurring during steady and stable crack growth by exploiting so-called V(z)-curves obtained with a scanning acoustic microscope. The results support the microcrack model assuming a formation of microcracks inside a frontal process zone around a macrocrack. From the measurements the microcrack density parameter and the size of the process zone are obtained. The contribution of the microcracks to the crack resistance is deduced as well as the their shielding effect around the macrocrack. However, the calculated increase of the crack resistance is about twice smaller than the measured one. For the prediction of the crack resistance, it is shown that the influence of residual compressive stress must be taken into account and that wake effects play an important role as well.

• 一般社団法人日本機械学会の論文
• 2001-10-20

著者

• Weides Gerd

  Fraunhofer Institute For Nondestructive Testing (izfp):(present Address)saars Chmiede

• Arnold Walter

  Fraunhofer Institute For Nondestructive Testing (izfp)

• FaBbender Sylvia

  Fraunhofer Institute for Nondestructive Testing (IZFP)

• Fabbender Sylvia

  Fraunhofer Institute For Nondestructive Testing (izfp):(present Address)q Net Quality Management Gmb

• Arnold Walter

  Fraunhofer Institute for Non-Destructive Testing (IZFP), Campus E 3.1, D-66123 Saarbrücken, Germany

関連論文

• A Method of Evaluating Local Elasticity and Adhesion Energy from the Nonlinear Response of AFM Cantilever Vibrations
• Measurement of Elastic Properties Related to the R-Curve-Behavior of Ceramics(Ceramics & Rocks 1)
• Mapping of elastic stiffness in an α+β titanium alloy using atomic force acoustic microscopy (Special issue: Scanning probe microscopy)

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