Crack measurement

J.R. Katzer and P.G. Rodewald, R.M. Lago for the hexane cracking measurements, F.G. Dwyer for supplying some of the zeolites used in this study, and N.H. Goeke for his experimental assistance. 

Dimensional methods having use in the laboratory have been reviewed in connection with swelling measurements.17, 18 The length of cracks can in fatigue tests can be manually measured by conventional methods or continually recorded with a video camera. An electrical method of crack measurement has been used for plastics19 that in principle could be applied to rubbers. 

Anstis, G.R., etal. (1981), Acritical evaluation of indentation techniques for measuring fracture toughness I, Direct crack measurements , J. Am. Ceram. Soc., 64(9), 533-8. AS 1774.5 (1979), The determination of density, porosity and water absorption , Standards... 

Some applications of ultrasonics are inspection for flaws in forgings, flat-rolled products such as strips, sheets and plates, castings, extrusion billets, rolling blooms or slabs, bar stock, pipes, welded joints, bonded joints, monitoring cracks, measurement of thickness, measurement of fluid levels, microstructural features and monitoring corrosion. 

G.R.Anstis,P.Chantikul,B.R.Lawn and D.B.Marshall. A critical evaluation of indentation techniques for measureing fracture toughness 1 Direct crack measurements. J.Am.Ceram.Soc., 1981,64[9]533-543... 

Anstis GR, Chantikul P, Lawn BR, Marshall DB. A critical evaluation of indentation techniques for measuring fracture toughness I direct crack measurements. Journal of the American Ceramic Society 1981 64(9) 533-538. 

Resistance to environmental stress cracking - Measurement of the melt flow index -Carbon black and/or mineral filler content measurement in polyethy-lene by direct combustion - Measurement of carbon black content by thermogravimetric analysis (TGA) - Assessment of carbon black dispersion in polyethylene using a microscope... 

In conclusion, the model performs well within the purely inductive frequency range. Both simplifications, the impedance boundary condition on the rod and the current sheet approximation with complex material properties, were successfully applied to the FEA model in 2D as well in 3D. As a result, the total element number was reduced by a factor of 3. Consequently, the simulation model allows extensive parameter studies for several types of cracks measured with different encircling coils. 

Fatigue Crack Measurement Techniques and Applications, K. J. Marsh, R. A. Smith, and R. O. Ritchie, Eds., EMAS, Cradley Heath, Warley, West Midlands, U.K., 1991. 

The energy release rate Q ri) at total crack width 2r] for each crack edge far behind the advancing portion of the tunnel crack, measured per... 

In this equation p is Poisson s ratio, P is the load in newtons, and V is the average length of a Palmqvist crack measured from the Vickers... 

Figure 13.12 Belchatov-creeping assessment by multi-functional geotextUe (MFG) sensors, (a) Crack opening (detail) and (b) crack measurement with scale for the calibration of the readings from the optical sensors embedded in the textile.

Anstis, G.R.. Chantikul, P., Lawn, B.R., Marshall, D.B., A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughnessi Direct Crack Measurements,. T. Am. Ceram. Soc.. 1981 64 (9) 533-538... 

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