TY - JOUR A1 - Ramanathan, Thillaiyan A1 - Schulz, Eckhard A1 - Subramanian, K. T1 - Determination of energy release rate in carbon fiber - Thermoplastic composites and comparison of crack propagation in amorphous and crystalline interface by single fiber pullout test JF - Journal of reinforced plastics and composites N2 - The fracture toughness in the fiber-matrix composite by means of the single fiber pull-out test can be achievable, if it is possible to measure the compliance of partial debonded fiber, which necessitates a stable crack propagation and the determination of the corresponding crack length. A combination of high stiff test equipment and a simultaneous monitoring of the photo-elastic pattern of the embedded fibers with the help of polarization microscope enables to measure crack length and determination of Gc [Hampe, A and Marotzke, C. (1997). The Energy Release Rate of the Fiber/Polymer Matrix Interface: Measurement and Theoretical Analysis, J. Reinf. Plast. and Compo., 16: 341-352.]. This method is well-known for glass fiber-amorphous polymer composite. In this investigation, we tried to implement the same technique to C-fiber with amorphous and semi-crystalline polymer composites. The energy release rate (ERR) of the fiber-matrix interface was evaluated for the carbon fiber-reinforced in polycarbonate (PC) by interfacial crack propagation arising in the single fiber pullout test. Further, the crack propagation at the fiber-matrix interface with different matrix morphology was discussed with the use of photo-elastic pattern observed with the aid of polarization microscope. KW - Micromechanics KW - Carbon Fibers KW - Thermoplastic polymers KW - Fracture toughness PY - 2004 DO - https://doi.org/10.1177/0731684404039788 SN - 0731-6844 SN - 1530-7964 VL - 23 IS - 15 SP - 1639 EP - 1650 PB - Technomic Publ. Co. CY - Westport, Conn. AN - OPUS4-4486 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -