Shearing of Paper Phenolic Laminates (Report 6)
Compression Shearing
1964 Volume 30 Issue 358 Pages 838-844
Details
1964 Volume 30 Issue 358 Pages 838-844
A new shearing method, of which characteristic exists in the application of an axial force normal to the sheared profile, was developed together with the clarification of its shearing mechanism. The results obtained are as follows :
(1) As the compressive axial force increases, the angle of first microcracks, α, decrease, while the specific shearing force, kc, produced in the moment of occurrence of first microcrack increase.
(2) When the absolute value of stress, σx′, induced by an axial force becomes about two times as large as that of k, the direction of first microcrack in the thickness center becomes normally to the plate surface, and [kc]/[kc]σx′=0 takes a value of 1.62.3.
(3) The analytical results above mentioned agree with the experimental ones fairly well.
(4) The quality of sheared parts is remarkably improved by a compressive axial force, while the shearing force is reduced by a tensile axial force.
