دورية أكاديمية

Mechanical Properties of Uncured Thermoset Tow Prepreg: Experiment and Finite Element Analysis

التفاصيل البيبلوغرافية
العنوان: Mechanical Properties of Uncured Thermoset Tow Prepreg: Experiment and Finite Element Analysis
المؤلفون: Mina Derakhshani Dastjerdi, Massimo Carboni, Mehdi Hojjati
المصدر: Journal of Composites Science; Volume 7; Issue 8; Pages: 312
بيانات النشر: Multidisciplinary Digital Publishing Institute
سنة النشر: 2023
المجموعة: MDPI Open Access Publishing
مصطلحات موضوعية: tensile modulus, prepreg, fiber waviness, RVE
الوصف: This paper presents an experimental analysis of the tensile behavior of unidirectional carbon/epoxy prepreg, focusing on the nonlinearity observed at the beginning of the stress–strain curve. Due to the material’s high viscosity, securely holding specimens during testing was challenging, prompting modifications in the gripping method to ensure reliable data. By using a longer gauge length, the slippage impact on elastic modulus measurement was minimized, resulting in good repeatability among the test samples. Experimental findings highlighted the significant interaction between fiber waviness and the viscous matrix, leading to stiffness reduction. The linear stiffness of the samples closely matched that of the fibers and remained unaffected by temperature variations. However, at higher temperatures, the epoxy matrix’s decreased viscosity caused an upward shift in the stiffness plot within the non-linear region. To support the experimental findings, a micromechanical model of prepreg tow with fiber waviness was proposed. An RVE model of periodically distributed unidirectional waved cylindrical fibers embedded within the matrix was developed to predict effective material stiffness parameters. The simulation outcomes aligned well with the uniaxial tensile test of the prepreg tow, demonstrating the proposed RVE model’s capability to accurately predict elastic properties, considering factors like fiber arrangement, waviness, and temperature.
نوع الوثيقة: text
وصف الملف: application/pdf
اللغة: English
العلاقة: Composites Modelling and Characterization; https://dx.doi.org/10.3390/jcs7080312Test
DOI: 10.3390/jcs7080312
الإتاحة: https://doi.org/10.3390/jcs7080312Test
حقوق: https://creativecommons.org/licenses/by/4.0Test/
رقم الانضمام: edsbas.D4F00759
قاعدة البيانات: BASE