ASTM D6068-10Standard Test Method for Determining J-R Curves of Plastic Materials
This test method covers the determination of the J-integral versus crack growth resistance (J-R) curves for polymeric materials. It is intended to characterize the slow, stable crack growth resistance of bend-type specimens in such a manner that it is geometry insensitive within limits set forth in this test method. This test method describes a multiple specimen method that requires optical measurement of crack extension from fracture surfaces.
Before conducting ASTM D6068, it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.