초록 ▼

A composite elongate shaft member useful in transmitting torque between axially spaced couplings rotatable about axes that may be misaligned. The member includes a series of bags of overlapped anisotropic layers each comprising parallel filaments bonded together in a matrix. The filaments in each la

A composite elongate shaft member useful in transmitting torque between axially spaced couplings rotatable about axes that may be misaligned. The member includes a series of bags of overlapped anisotropic layers each comprising parallel filaments bonded together in a matrix. The filaments in each layer pair are disposed at a predetermined lay angle with respect to the longitudinal axis of the shaft member with the lay angles in adjacent layers of each pair being substantially equal in magnitude but opposite in direction. A desirable ratio of torsional stiffness to bending stiffness is provided while minimizing bending stresses in the member by disposing the filaments at a predetermined angle which is selected in relation to the stiffness of the matrix material to cause the strain in the circumferential direction of the member to be substantially equal to the strain in the radial direction when the member is subjected to axial strain.

대표청구항 ▼

In a composite elongate member for use in transmitting torque between juxtaposed elements rotatable about axes that may be misaligned, the member including a series of pairs of overlapped anisotropic layers bonded together circumferentially about a longitudinal axis with each layer pair comprising s

In a composite elongate member for use in transmitting torque between juxtaposed elements rotatable about axes that may be misaligned, the member including a series of pairs of overlapped anisotropic layers bonded together circumferentially about a longitudinal axis with each layer pair comprising substantially parallel filaments bonded together by a matrix material, the filaments in each layer pair being disposed at a predetermined lay angle with respect to said longitudinal axis, the lay angle of the filaments in adjacent layers of each pair being substantially equal in magnitude with one another but opposite in direction with respect to said longitudinal axis so that filaments in adjacent layers of each pair cross one another, the improvement wherein said lay angle of at least one of said pairs of layers is preselected with respect to the stiffness of the matrix material so that the strain in the member in the circumferential direction is substantially equal to the strain in the member in the radial direction when the member is subjected to strain in the axial direction, whereby the bending stress in the composite member is at a minimum while the ratio of torsional stiffness to bending stiffness of the member is not adversely affected.