Article
Materials Science, Composites
Masayuki Nakada, Yasushi Miyano, Soshi Kageta, Hirofumi Nishida, Yutaka Hayashi, Kiyoshi Uzawa
Summary: The study examines the prediction of statistical life time for the developed CF/TP strands under wet conditions, with water absorption influencing the statistical long-term creep and fatigue strengths of the strands.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2022)
Article
Polymer Science
Mohammad Amjadi, Ali Fatemi
Summary: This paper proposes a critical plane-based fatigue damage model for predicting tension-tension or tension-compression fatigue life of short glass fiber-reinforced thermoplastics, considering fiber orientation and mean stress effects. The model also includes temperature and frequency effects, and comparisons are made with experimental data to validate and analyze the model predictions.
Article
Materials Science, Composites
Jinhyeok Jang, Hyonwoo Pang, Jae-Hyuk Choi, Jeong-Min Cho, Woong-Ryeol Yu
Summary: This study proposed a new method to determine an appropriate testing frequency by considering temperature increase, and experimentally determined viscoelastic and thermal parameters during fatigue testing to calculate a critical frequency for a limited temperature rise. Experimental fatigue tests were conducted at low stress levels and high frequencies, demonstrating the applicability of this method to design fatigue tests considering stress levels and temperature rise.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
C. Hemanth Kumar, R. P. Swamy
Summary: This study evaluated the fatigue life of glass fiber reinforced epoxy composites under combined rotating bending loads, showing a decrease in fatigue life with increasing stress levels. An artificial neural network approach was utilized to demonstrate the impact of stress levels on fatigue strength and failure modes, with high correlation between experimental data and ANN outputs. Three failure modes were observed during low and high cycle fatigue tests, successfully classified by ANN with 100% accuracy using a conjugate gradient backpropagation algorithm.
COMPOSITES COMMUNICATIONS
(2021)
Article
Mechanics
Rui Guo, Guijun Xian, Chenggao Li, Bin Hong
Summary: In this study, a hybrid rod with carbon/glass fibers uniformly dispersed was developed for use as a bridge cable using the pultrusion technology. The tension-tension fatigue performances of the hybrid rod were investigated at different stress levels, and the fatigue failure mechanism was analyzed. The results showed that the hybrid rod exhibited improved fatigue life and stiffness retention through the fiber uniformly hybrid technology.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Chemistry, Physical
Mithil Kamble, Aniruddh Vashisth, Hongkun Yang, Sikharin Pranompont, Catalin R. Picu, Dong Wang, Nikhil Koratkar
Summary: Most current approaches to combating fatigue in carbon-fiber reinforced polymeric composites are unable to reverse the fatigue process. This study introduces a vitrimeric system that can repeatedly reverse fatigue damage by heating the material above its topology freezing transition temperature. This innovation allows for intermittent healing of fatigue-induced damage, postponing fatigue failure indefinitely.
Article
Mechanics
Dieter Meinhard, Andreas Haeger, Volker Knoblauch
Summary: In this study, a carbon fiber-reinforced thermoplastic (CFRTP) laminate was drilled and evaluated. The dominant damage type was identified as burr formation, with no critical influence on the mechanical performance.
COMPOSITE STRUCTURES
(2021)
Article
Green & Sustainable Science & Technology
Kai Cui, Lihua Xu, Xuefeng Li, Xuan Hu, Le Huang, Fangqian Deng, Yin Chi
Summary: The study shows that the addition of polypropylene fiber can significantly prolong the fatigue strength of concrete. The fatigue life of PFRC increases with an increase in the polypropylene fiber volume fraction, but decreases with an increase in the fiber aspect ratio. The research also developed a fatigue equation for PFRC which can accurately predict its fatigue life, providing valuable information for the future development of design specifications for PFRC structures.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Composites
Bradley A. A. Newcomb
Summary: Vehicle mass can be reduced by using carbon fiber reinforced composites in the body structure. This study investigates the potential use of planar isotropic compression molded carbon fiber reinforced composites as primary energy absorbing structures in automobiles. The energy absorption behavior of different types of carbon fiber reinforced composites is studied through crush testing, and the results show that the length of the crush fixture support affects the failure mode and specific energy absorption of the composites. Elevated temperature testing reduces the specific energy absorption of one type of composite. Finally, the benefits of using a carbon fiber composite front end energy absorbing structure in terms of mass reduction are discussed.
POLYMER COMPOSITES
(2023)
Article
Engineering, Mechanical
Vanessa Kwiatkowski, Matthieu Le Saux, Vincent Le Saux, Sylvain Leclercq, Yann Marco
Summary: This paper introduces an experimental protocol for well-controlled cyclic compression tests without anti-buckling devices and checks the uniaxiality of the global loading using kinematic and thermoelastic coupling field measurements. Then, it compares the results from fatigue and heat buildup tests for polyetheretherketone reinforced with short carbon fibers under different load ratios, showing that the fatigue lifetime is higher in compression and depends on the compression load ratio. The heat buildup approach is found to be a relevant method to quickly predict the fatigue lifetime of the material.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Materials Science, Composites
Wenhao Wang, Zhanyu Zhai, Jinglin Liu, Yilei Wang, Zhonghao Yang
Summary: This study investigates the use of nickel electroplated carbon fiber fabric to enhance the EMI shielding capability of carbon fiber reinforced thermoplastics. The results show that the nickel electroplating improves the mechanical properties and shielding efficiency of the composites.
POLYMER COMPOSITES
(2023)
Article
Polymer Science
Anbang Li, Lu Wang, Shanhua Xu
Summary: The purpose of this study is to investigate the mechanism of improving fatigue performance and the estimation model of fatigue life for corroded steel plate strengthened with CFRP plates. A two-stage fatigue crack propagation prediction model was proposed and its accuracy was verified. Parameter analysis was conducted to investigate the effect of various factors on the fatigue crack propagation. The results showed that the rust pits can be used as the equivalent dimensions for the prediction of crack propagation. Increasing weight loss rate, initial crack size or adhesive thickness accelerated crack growth, while increasing CFRP stiffness or prestress level reduced crack growth rate and increased fatigue life.
Article
Materials Science, Multidisciplinary
Binbin Zhang, Jingran Ge, Feng Cheng, Jian Huang, Shuo Liu, Jun Liang
Summary: A novel virtual experimental testing methodology is proposed to simulate and analyze the inter-fiber failure of unidirectional carbon fiber reinforced polymer composites. The method utilizes virtual microstructures representative of genuine fiber distribution. The results demonstrate the significant influence of interfacial parameters and epoxy properties on the predicted macroscopic responses.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Zian Zhang, Zhiping Xu
Summary: This study investigates the failure mechanisms of single-wall carbon nanotubes under different strain and temperature conditions, and proposes a kinetic model based on the Arrhenius law for life prediction in mechanical degradation processes. The results show that the failure mechanisms and life distribution of nanotubes vary under different conditions.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Engineering, Mechanical
Zuxiang Lei, Gan Luo, Weikang Sun, Yawei Dong, Zhifei Tan, Yun Wan, Binbin Yin
Summary: The Iosipescu method is extended to analyze the shear fatigue properties of carbon fiber reinforced epoxy composites. The S-N curves of stress level versus logarithmic fatigue life exhibit a good linear relationship, and the specimens show better fatigue performance at a stress ratio of 0.1. A significant three-stage cumulative damage evolution characteristic is found in the fatigue stiffness degradation process. The damage evolution, dominated by the propagation of matrix microcracks along the fiber direction, is captured and analyzed.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Materials Science, Composites
Masayuki Nakada, Yasushi Miyano, Yoko Morisawa, Hirofumi Nishida, Yutaka Hayashi, Kiyoshi Uzawa
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2019)
Article
Materials Science, Composites
Masayuki Nakada, Yasushi Miyano
JOURNAL OF COMPOSITE MATERIALS
(2020)
Article
Materials Science, Composites
Masayuki Nakada, Yasushi Miyano, Yoko Morisawa, Takeharu Isaki, Taiki Hirano, Kiyoshi Uzawa
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2020)
Article
Materials Science, Composites
Yasushi Miyano, Masayuki Nakada, Yo Yoshikoshi
Summary: The developed accelerated testing methodology based on matrix resin viscoelasticity was successfully applied to predict the long-term creep failure life of unidirectional CFRP laminates under bending load. The results showed that the creep strength under bending load decreases drastically with time and temperature, with a larger effect compared to tension load.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Materials Science, Composites
Masayuki Nakada, Yasushi Miyano, Soshi Kageta, Hirofumi Nishida, Yutaka Hayashi, Kiyoshi Uzawa
Summary: The study examines the prediction of statistical life time for the developed CF/TP strands under wet conditions, with water absorption influencing the statistical long-term creep and fatigue strengths of the strands.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2022)
Article
Materials Science, Composites
Masayuki Nakada, Yasushi Miyano, Yoko Morisawa, Taiga Nonaka, Takeharu Isaki, Taiki Hirano, Kiyoshi Uzawa
Summary: Our developed accelerated testing methodology based on matrix resin viscoelasticity can successfully predict the long-term creep failure time of carbon fiber reinforced plastics under creep bending load. By measuring the static strengths and viscoelasticity of the laminates at different temperatures, we can easily predict the statistical long-term creep failure times.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2022)
Article
Materials Science, Composites
Yasushi Miyano, Masayuki Nakada, Yoko Morisawa
Summary: This paper presents an accelerated testing methodology (ATM) based on matrix resin viscoelasticity for predicting the failure life of carbon-fiber reinforced polymers (CFRP) under bending load. By conducting bending tests and analyzing the data, a master curve of fatigue strength versus number of cycles to failure (S-N master curve) was constructed and compared with previous creep strength results.
JOURNAL OF COMPOSITE MATERIALS
(2022)
