• Setyabudi, Sofyan Arief
• Fujikawa, Masaki
• Makabe, Chobin
• Ferdous, Md. Shafiul

Abstract

<jats:p> The fatigue and fracture behavior of C/C composites fabricated using fine-woven carbon fiber laminates with α = 0/90° direction were investigated. Also, the phenomenon of crack growth behavior and the shear damage in the fiber bundle was discussed. Slits of several sizes were cut on both sides of a test section and different sizes of slit length were chosen. The effect of the slit configuration on crack initiation and growth behavior was observed. Specimens with blunt-notches and center-holes were also used to compare the fatigue strength and crack growth behavior. Non-propagating cracks were observed and fatigue limit was defined as the maximum stress at which specimen did not break for N = 10<jats:sup>7</jats:sup> cycles stress application. The longest fatigue life was obtained in the case of specimens with shorter slits. The relationships between fatigue strengths and specimen shapes were analyzed by stress concentration, K<jats:sub> t </jats:sub>, and stress intensity factor, K<jats:sub> I </jats:sub>. The effect of slit configuration on fatigue strength was then discussed regarding both the experimental and calculated consequences. </jats:p>

Topics

• Carbon
• crack
• strength
• fatigue
• composite
• fracture behavior
• woven