Off-axis tensile creep deformation in unidirectional carbon/epoxy laminates

Shinji Ogihara, Shinichiro Moriwaki

Research output: Contribution to conferencePaper


In the present study, tensile tests and creep tests of unidirectional CFRP laminates are performed at off-axis angles (15°, 30°, 45°, 60°, 75°) and 90°. The purpose of this study is to model the nonlinear behavior and creep deformation behavior. A CFRP material used is T700S/2500 carbon/epoxy system. The specimen size is 120mm long, 10mm wide and 0.74mm thick. The tests are performed at room (25°C) and high (65°C) temperatures. In the creep tests, constant tensile stresses of 30MPa and 38MPa are applied on the specimens for 400 minutes. A biaxial strain gage is mounted at the center of a specimen to measure time-strain relation. The creep compliance increases rapidly for the specimen with large off-axis angles. To model the creep behavior, an effective creep compliance model is applied. It is found that the strain-time behavior in unidirectional laminate can be described by the effective creep compliance model.

Original languageEnglish
Number of pages8
Publication statusPublished - 8 Nov 2004
EventICCM-14 - San Diego, CA, United States
Duration: 14 Jul 200318 Jul 2003


CountryUnited States
CitySan Diego, CA



  • Carbon/epoxy
  • Creep
  • Off-axis loading
  • Unidirectional laminate

Cite this

Ogihara, S., & Moriwaki, S. (2004). Off-axis tensile creep deformation in unidirectional carbon/epoxy laminates. 203-210. Paper presented at ICCM-14, San Diego, CA, United States.