Question

A single fiber pull-out test is carried out on a sample with a fiber embedded in a matrix. Given fiber strength = 4 Gpa and fiber interfacial bond strength = 30 MPa. Fiber modulus is 35 GPa, matrix modulus is 2 GPa. Poisson’s ratio for the matrix is 0.3. a) What is the peak stress during the fiber pull-out? b) Please sketch a diagram showing the stress-strain relationship during the fiber pull-out test. The fiber diameter is 8 um and the embedded fiber length is 80 um.

Answer 1