Preparation and characterization of the modulus intermediate layer in carbon fiber/epoxy composites by depositing sepiolites

2016 ◽  
Vol 133 (37) ◽  
Author(s):  
Qing Yang ◽  
Qingjie Zhang ◽  
Xin Chen ◽  
Xi Deng ◽  
Shengli Qi ◽  
...  
2016 ◽  
Vol 90 ◽  
pp. 37-44 ◽  
Author(s):  
Myungsoo Kim ◽  
Dae Han Sung ◽  
Kyungil Kong ◽  
Nari Kim ◽  
Byeong-Joo Kim ◽  
...  

Author(s):  
J. Y. Chen ◽  
J. Cho ◽  
I. M. Daniel

The epoxy matrix in carbon fiber/epoxy composites was modified with graphite nanoplatelets to improve the matrix dominated mechanical properties of the composite. A prepreg-autoclave process was developed for preparation of nanoparticle-reinforced fiber composites. The in-plane shear modulus and longitudinal compressive strength were enhanced. The compressive strength of the composite was increased by 43% and 44%, and the in-plane shear modulus was improved by 7% and 15% for 3 wt% and 5 wt% of nanoparticle loadings, respectively. This mechanical enhancement is mainly attributed to the reinforcement of matrix phase by the nanoparticles. However, the substantially improved compressive strength is attributed in large part to the reduced waviness of the fibers in the uni-weave perform caused by the nanoparticles between layers.


2000 ◽  
Vol 34 (13) ◽  
pp. 1216-1239
Author(s):  
JEFF M. GANLEY ◽  
ARUP K. MAJI ◽  
STEVEN HUYBRECHTS

Entropy ◽  
2021 ◽  
Vol 23 (2) ◽  
pp. 224
Author(s):  
Changsheng Yuan ◽  
Yingjie Liang

This paper verifies the feasibility of the relative entropy method in selecting the most suitable statistical distribution for the experimental data, which do not follow an exponential distribution. The efficiency of the relative entropy method is tested through the fractional order moment and the logarithmic moment in terms of the experimental data of carbon fiber/epoxy composites with different stress amplitudes. For better usage of the relative entropy method, the efficient range of its application is also studied. The application results show that the relative entropy method is not very fit for choosing the proper distribution for non-exponential random data when the heavy tail trait of the experimental data is emphasized. It is not consistent with the Kolmogorov–Smirnov test but is consistent with the residual sum of squares in the least squares method whenever it is calculated by the fractional moment or the logarithmic moment. Under different stress amplitudes, the relative entropy method has different performances.


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