2. Sampling of test pieces from panels
Rilem · 1994
The test piece shall not be stressed beyond its proportional limit. To eliminate the effects of any slight initial curvature, two sets of data shall be obtained, the second set with the test piece rotated 90° about an axis through the centre of the test piece and perpendicular to the plane of the plies. The two results shall be averaged to obtain the shear modulus for the test piece.