constrained path

10:32 Jun 22, 2017 

Type CP, a test piece described in Fig. 3, which is a
modified trouser tear test piece with a constrained path for the
tear. Type CP also measures tear propagation in a direction
parallel to the length of both legs, but the constrained path
prevents the tear from propagating away from this path, and the
thicker legs eliminate the influence of leg extension which may
occur with Type T test pieces. See (1) for more information on
CP tear testing.