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عنوان فارسی مقاله:
بررسی تجربی و عددی اتلاف انرژی درون ورقه های نازک و اثر اندازه در کامپوزیت های نساجی دو بعدی
عنوان انگلیسی مقاله:
Experimental and numerical investigation of intra-laminar energy dissipation and size effect in two-dimensional textile composites
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Thanks to their outstanding specific mechanical properties, the engineering use of textile composites is becoming broader and broader. Current applications include land, marine and air transportation, wind and tidal energy production, and blast protection of civil infrastructures and vehicles [1e3]. However, design of large composite structures requires capturing the scaling of their mechanical properties, an aspect often overlooked in the literature on composites. This can be achieved only by abandoning the current design paradigm, which relies on strength-based approaches incapable of predicting any scaling, and acknowledging the quasibrittle character of these materials. Due to the complex mesostructure characterizing textile composites (and other quasibrittle materials such as concrete, nanocomposites, ceramics, rocks, sea ice, and many bio-materials, just to mention a few), the size of the non-linear Fracture Process Zone (FPZ) occurring in the presence of a large stress-free crack is usually not negligible [4e6]. The stress field along the FPZ is nonuniform and decreases with crack opening, due to discontinuous cracking, crack bridging by fibers, and frictional pullout of inhomogeneities. As a consequence, the fracturing behavior and, most importantly, the energetic size effect associated with the given structural geometry, cannot be described by means of the classical Linear Elastic Fracture Mechanics (LEFM). To capture the effects of a finite, non-negligible FPZ, the introduction of a characteristic (finite) length scale related to the fracture energy and the strength of the material is necessary [4,7]. However, esti- * Corresponding author. mating accurately these material properties is far from easybecause the fracture tests usually exhibit an extreme snap-back at peak load, with a loss of stability [7,8]. A possible way to overcome these issues is size effect testing [4,7]. This study proposes an experimental and numerical investigation on the efficacy of the intra-laminar size effect testing to characterize the fracturing behavior of textile composites. It is worth remarking here that the size effect method of measuring the fracture properties is easier to implement than other methods because only peak load measurements are necessary. The postpeak behavior, crack tip displacement measurement, and optical measurement of the crack tip location are not needed, and even a soft testing machine without servo-control can be used.
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کلمات کلیدی:
Experimental and Numerical Investigation of Intra ... - ResearchGate https://www.researchgate.net/.../303409213_Experimental_and_Numerical_Investigatio... Experimental and Numerical Investigation of Intra-Laminar Energy Dissipation and Size Effect in Two-Dimensional Textile Composites. Article (PDF Available) in ... Scites for Experimental and Numerical Investigation of Intra-Laminar ... https://scirate.com/arxiv/1605.06174/scites Experimental and Numerical Investigation of Intra-Laminar Energy Dissipation and Size Effect in Two-Dimensional Textile Composites. https://scirate.com/arxiv/ ... Experimental and numerical investigation of intra-laminar ... - DeepDyve https://www.deepdyve.com/.../experimental-and-numerical-investigation-of-intra-lami... Read "Experimental and numerical investigation of intra-laminar energy dissipation and size effect in two-dimensional textile composites, Composites Science ... Shiva Esna Ashari - Google Scholar Citations scholar.google.com/citations?user=1yCUFwsAAAAJ&hl=en Northwestern University - u.northwestern.edu Modeling delamination in composite laminates using XFEM by new orthotropic ... Energy Dissipation and Size Effect in Two-Dimensional Textile Composites. Kedar Kirane - Google Scholar Citations scholar.google.com/citations?user=0mwy1dEAAAAJ&hl=en Senior Research engineer, ExxonMobil Upstream Research Company - u.northwestern.edu Experimental and numerical investigation of intra-laminar energy dissipation and size effect in two-dimensional textile composites. M Salviato, K Kirane, SE ... Experimental and Numerical Investigation of Intra-Laminar ... - MathPubs www.mathpubs.com/.../Experimental-and-Numerical-Investigation-of-Intra-Laminar-... Experimental and Numerical Investigation of Intra-Laminar Energy Dissipation and Size Effect in Two-Dimensional Textile Composites. 2016May. Experimental ... Recent Composites Science and Technology Articles - Elsevier https://www.journals.elsevier.com/composites-science-and-technology/recent-articles Recently published articles from Composites Science and Technology ... This work aims to study the effect of reactive molding on polyamide-6 (PA6) based micro .... the strength of two-dimensional randomly oriented short-fiber composites ... on tribological performance of hybrid PTFE/Nomex fabric/phenolic composite.
