Strength and Stiffness Degradation of Carbon Fiber Reinforced Plastic under Cyclic Loading under Membran-, Shear- and Bending Loading

Abstract:

In order to meet the increasing lightweight requirements, the application of fiber reinforced plastics is indispensable. To ensure the structural durability of the car or machine under operational conditions, it is essential to know the long term behavior of carbon fiber reinforced plastic material (CFRP) under the numerous influencing factors under fatigue loading. For a reliable safety assessment of the car structure under operational conditions, the degradation of the stiffness and of the static strength after a certain damage due to cyclic loading is of particular importance. The paper covers the loss of stiffness and remaining strength as a function of fatigue damage for specimen and components under membrane, shear and bending loading. The tests are done using different layer set-ups (unidirectional, angle ply, quasiisotropic) and various loading conditions (membrane, shear and bending loading). In order to account for the transferability, the tests are carried out using specimen and components (hat sections). Both specimen and components show a significant loss in strength and stiffness.

• Periodical: Materials Science Forum (Volumes 825-826)
• Pages: 968-975
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.825-826.968
• Online since: July 2015
• Authors: Peter Haefele*, Oscar Herrera
• Keywords: Carbon Fiber Reinforced Material, Fatigue Behavior, Mean Stress Influence, Remaining Strength, Stiffness Loss

References

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DOI: 10.1016/b978-0-08-029384-4.50032-8

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