Fatigue Life Prediction of a Unidirectional Carbon Fiber Composite Under Off-Axis Spectrum Loads Using 3D Constant Life Diagram

2016 ◽  
Vol 5 (1) ◽  
pp. MPC20150048 ◽  
Author(s):  
M. S. Hussain ◽  
A. R. Anilchandra ◽  
N. Jagannathan ◽  
C. M. Manjunatha
Keyword(s):  
Fatigue Life ◽  
Carbon Fiber ◽  
Life Prediction ◽  
Fiber Composite ◽  
Fatigue Life Prediction ◽  
Carbon Fiber Composite

scholarly journals DAMAGE PROPAGATION AND THERMOGRAPHY IN DISCONTINUOUS CARBON FIBER COMPOSITE (DCFC) UNDER TENSILE (FATIGUE) LOADING

2019 ◽  
Vol 82 (1) ◽  
Author(s):  
Jefri Bale ◽  
Emmanuel Valot ◽  
Olivier Polit
Keyword(s):  
Fatigue Life ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Thermal Response ◽  
Fatigue Loading ◽  
Carbon Fiber Composite ◽  
Damage Propagation ◽  
Initial Damage ◽  
Tensile Fatigue ◽  
Non Destructive

The discontinuous carbon fiber composite (DCFC) has a different damage behaviour due to non homogenuous sub structure. Consequently, monitoring and diagnosis of DCFC damage mechanisms require the application of a contactless method in real-time operation, i.e., non destructive method of thermography. The aim of this study is to investigate the damage propagation of DCFC material under tensile (fatigue) condition with non destructive testing (NDT) thermography method. Under fatigue testing, temperature evolutions were monitored by an Infra-Red (IR) camera. The results show that damage propagation and thermal response indicated the similar behaviour which consists of three stages. At the beginning, low temperature increased until ≈ 10% of fatigue life due to the initial damage. The initial damage propagated and the temperature reached the stable thermal state due to the saturation in the damage appearance of micro cracking of matrix and chip until ≈ 80% of fatigue life. At the last ≈ 20% of fatigue life, damage continued to propagate and provoked the occurrence of macro damage that induced the final failure indicated by highest peak of temperature. The analysis from the experiment results concluded that thermal response relates with the damage propagation of DCFC under fatigue loading.

scholarly journals Mechanical Properties and Tensile Fatigue of Graphene Nanoplatelets Reinforced Polymer Nanocomposites

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Ming-Yuan Shen ◽  
Tung-Yu Chang ◽  
Tsung-Han Hsieh ◽  
Yi-Luen Li ◽  
Chin-Lung Chiang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fatigue Life ◽  
Carbon Fiber ◽  
Ultimate Tensile Strength ◽  
Composite Laminates ◽  
Epoxy Composite ◽  
Fiber Composite ◽  
Graphene Nanoplatelets ◽  
Carbon Fiber Composite

Graphene nanoplatelets (GNPs) are novel nanofillers possessing attractive characteristics, including robust compatibility with most polymers, high absolute strength, and cost effectiveness. In this study, GNPs were used to reinforce epoxy composite and epoxy/carbon fiber composite laminates to enhance their mechanical properties. The mechanical properties of GNPs/epoxy nanocomposite, such as ultimate tensile strength and flexure properties, were investigated. The fatigue life of epoxy/carbon fiber composite laminate with GPs-added 0.25 wt% was increased over that of neat laminates at all levels of cyclic stress. Consequently, significant improvement in the mechanical properties of ultimate tensile strength, flexure, and fatigue life was attained for these epoxy resin composites and carbon fiber-reinforced epoxy composite laminates.

Fatigue life of a carbon fiber composite T-joint under a standard fighter aircraft spectrum load sequence

2015 ◽  
Vol 127 ◽  
pp. 260-266 ◽  
Author(s):  
M.M. Thawre ◽  
K.N. Pandey ◽  
A. Dubey ◽  
K.K. Verma ◽  
D.R. Peshwe ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Carbon Fiber ◽  
Fiber Composite ◽  
Carbon Fiber Composite ◽  
Fighter Aircraft ◽  
Load Sequence

scholarly journals Fatigue Life Prediction of Reinforced Concrete Beams Strengthened with CFRP: Study Based on an Accumulative Damage Model

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 130 ◽  
Author(s):  
Xin-Yan Guo ◽  
Yi-Lin Wang ◽  
Pei-Yan Huang ◽  
Xiao-Hong Zheng ◽  
Yi Yang
Keyword(s):  
Reinforced Concrete ◽  
Fatigue Life ◽  
Carbon Fiber ◽  
Prediction Model ◽  
Life Prediction ◽  
Damage Model ◽  
Fatigue Life Prediction ◽  
Rc Beams ◽  
Rc Structures ◽  
Life Prediction Model

With the prestressed carbon fiber reinforced polymer (CFRP) strengthening technique widely used in reinforced concrete (RC) structures, it is more and more important to study the fatigue performance of RC structures. Since the fracture of a tensile steel bar at the main cracked section is the leading reason for the failure of RC beams reinforced by prestressed CFRP, a fatigue life prediction model of RC beams reinforced by prestressed CFRP was developed based on an accumulative damage model. Moreover, gradual degradation of the performance of the concrete was considered in the fatigue life prediction model. An experimental study was also conducted to research the fatigue behavior of RC beams reinforced by prestressed or non-prestressed carbon fiber laminate (CFL). During the tests, fatigue crack patterns were captured using a digital image correlation (DIC) technique, and the fatigue lives of a total of 30 beams were recorded. The results showed that the predicted main crack propagation curves and the fatigue lives were close to the experimental data. This study also exhibited that the prestressed CFRP could reduce the stress of main steel bars in RC beams and effectively improve the fatigue performance of the RC beams.

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