ASTM D 5397 – Standard Test Method for Evaluation of Stress Crack Resistance of Polyolefin Geomembranes Using Notched Constant Tensile Load Test ( NCTL )- Testing Equipment
6 Apparatus6.1 Blanking Die—A die suitable for cutting test specimens to the dimensions and tolerances shown in Fig. 1.NOTE 1—The length of the specimen can be changed to suit the design of the test apparatus. However, there should be a constant neck section with length at least 13 mm (0.5 in.) long. The width should…