Temperature dependence of glass fiber/epoxy interface normal strength examined by a cruciform specimen method

Koyanagi, Jun; Ogihara, Shinji

doi:10.1016/j.compositesb.2011.04.041

Cited by 17 publications

(12 citation statements)

References 13 publications

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“…The equation is the inverse function of creep compliance, consisting of the generalized Voigt model accompanying one spring element in series, often used to express the relaxation modulus for polymer materials. [5][6][7][8]11 -16 We also conducted a constant strain rate (CSR) tensile test for the neat resin specimen. The curing conditions are the same as mentioned above.…”

Section: Time and Temperature Dependence Of Matrix Modulus And Strengthmentioning

confidence: 99%

“…In the second section, the experimental results of time and temperature dependence of matrix and composite strengths are shown. In the third section, the SFF model is introduced and recently presented interfacial failure criterion is described, [5][6][7][8][9][10] and then estimated and experimentally obtained composite strengths are compared. In the fourth section the validity and application of the results are discussed, and then a method for predicting the long-term durability of CFRP is proposed.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of long-term durability of unidirectional CFRP

Koyanagi

Nakada

Miyano

2011

Journal of Reinforced Plastics and Composites

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This study examines the applicability of the SFF model (Koyanagi J, Kotani M, Hatta H and Kawada H. A comprehensive model for determining tensile strengths of various unidirectional composites. J Compos Mater 2009; 43: 1901-1914 to the time and temperature dependence of strength for two kinds of CFRP. The only difference in the materials is the reinforcing carbon fiber, which is not time or temperature-dependent; the time and temperature dependence of strength for the two materials differ. The SFF model, however, can follow their strengths well. Postulating the SFF applicability, the validity of the conventional accelerated testing methodology by elevated temperature and a simple method to predict long-term durability, including creep lifetime, are discussed.

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Section: Time and Temperature Dependence Of Matrix Modulus And Strengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of long-term durability of unidirectional CFRP

Koyanagi

Nakada

Miyano

2011

Journal of Reinforced Plastics and Composites

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“…One of these tests, the cruciform specimen test, is a promising method for evaluating interface strength because the interface failure initiates from a uniform stress region, not from a part where a stress singularity exists, making it different from conventional tests. The cruciform specimen test was first implemented by Gundel et al [60] and then studied further by Tandon and Kim [61] and the authors [62]. These articles present the interfacial failure envelope under combined stresses, obtained using a cruciform specimen test in which the off-load axis is varied to create various normal/shear stress ratios.…”

Section: Analysis Of Single Fiber Tensile Strengthmentioning

confidence: 98%

CNT-Based Inherent Sensing and Interfacial Properties of Glass Fiber-Reinforced Polymer Composites

Wang

Kwon

et al. 2015

Handbook of Polymer Nanocomposites. Processing, Performance and Application

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“…Recently, some micromechanical methods have been introduced to characterize the interphase adhesion in fiber‐reinforced polymer composites at high temperature. For example, the temperature dependence of interface bonding was investigated using the single‐fiber fragmentation test (SFFT) [8–12], the microdroplet test [13], and the cruciform specimen method [14]. These methods show the effect of temperature on the interfacial property and validity of micromechanical methods to evaluate the thermal stability of the interphase.…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on interfacial bonding property of single‐carbon fiber/epoxy resin composite

Liu

Zhang

et al. 2012

Polymer Composites

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The changes in interfacial fracture energy of three kinds of commercially sized carbon fiber (CF)/epoxy resin composites in the range from ambient temperature to 130°C were investigated using the single‐fiber fragmentation test to evaluate the heat resistance of the interphase. The effects of CF sizing on the interfacial bonding property were studied using desized CF/epoxy resin composites. Thermogravimetric analysis and differential scanning calorimetry of the combination of sizing and matrix were employed to investigate the role of sizing on the variations in the fiber/matrix interfacial property under elevated temperature. The interfacial fracture energy values of all the studied CF composites were found to decrease quickly during the initial stage of temperature rise and drop gradually at higher temperature. At elevated temperature, the desized CF composites had higher heat resistance than the corresponding sized fiber composites. The differences in the interfacial heat resistance among the three kinds of CF composites and the difference in the interfacial thermal stability between the sized and the desized fiber composites were related to different glass transition temperatures of the interphases. The interaction between sizing and the matrix and the chain motion of the crosslink structure of the interphase has been suggested to determine the interfacial heat resistance. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers

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Temperature dependence of glass fiber/epoxy interface normal strength examined by a cruciform specimen method

Cited by 17 publications

References 13 publications

Prediction of long-term durability of unidirectional CFRP

Prediction of long-term durability of unidirectional CFRP

CNT-Based Inherent Sensing and Interfacial Properties of Glass Fiber-Reinforced Polymer Composites

Temperature effect on interfacial bonding property of single‐carbon fiber/epoxy resin composite

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