Notch overview

Fig. 2a Distribution of the first principal stress at the surfece of a typical notched ball specimen at a load of 1 N (ball diameter 31.75 mm notch length 80 % of the diameter, notch width 8.5 % of the diameter, fillet radius 0.675 mm Poisson s ratio 0.27). a) Overview on the specimen s surface, and b) path along the equatorial plane (path 1-3) and the plane perpendicular to the equatorial plane (path 1-2).

Several accelerated long-term tests for assessing the stress-cracking resistance (ESC) to be less time consuming than conventional creep tests were developed such as the full notch creep test (FNCT) as one of the most important methods using notched specimens (an overview about accelerated methods is given in Chapter 4.7, Stress Cracking Resistance )- Moreover a couple of methods for components or semi-finished products (such as plastic pipes) are available where the full-scale pipe test and small-scale steady state test (S4 Test) are the most used ones. 

Figure 5.7 Overview of response surface plots for compatibilized blend, (a) Flexural modulus (b) notched Izod impact (c) elongation at break (300 rpm screw speed) (d) tensile strength (e) heat distortion temperature.

The model theories will be briefly discussed in the following on the basis of a few important references. Research work that had chosen the longterm tensile test on notched samples (versions of the NCTL tests) as their test method have mainly been selected since this test plays an important role for geomembranes. A complete and exhaustive overview of the technical literature would go beyond the scope of this book. 

Overview of initiation zone of crazes at a surface notch in a deformed thin film in low magnification in TEM ... 

Overview of Notch Behavior Micromechanism Element Analysis... 

Overview of the Notched 31.4 Recent Studies of 31.5 The Effects of Notches on... 

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