A unidirectional graphite/epoxy specimen is loaded by a uniaxial stress of 100 MPa along the y-axis. The fibers of the composite are at an angle of 30 to this axis. A strain gage is placed to measure strain in the direction of the applied stress. The composite has the following properties as referenced to the fiber direction.E1 = 143 GPa G12 = 6.0 GPa 12 = 0.28 E2 = 9.8 GPa Find the following stress and strains: 1.Determine the stresses along and perpendicular to the fibers 2.Determine the strains along and perpendicular to the fibers

A unidirectional graphite/epoxy specimen is loaded by a uniaxial stress of 100MPa along the y-axis. The fibers of the composite are at an angle of 30 to this axis. A strain gage is placed to measure strain in the direction of the applied stress. The composite has the following properties as referenced to the fiber direction. - E1=143GPaG12=6.0GPa - v12=0.28E2=9.8GPa Find the following stress and strains: 1. Determine the stresses along and perpendicular to the fibers 2. Determine the strains along and perpendicular to the fibers Typical Mechanical Properties of a Unidirectional Lamina (SI System of Units) Source: Tsai, S.W. and Hahn, H.T., Introduction to Composite Materials, CRC Press, Boca Raton, FL, Table 1.7, p. 19; Table 7.1, p. 292; Table 8.3, p. 344. Reprinted with permission