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Journals / Tekstil ve Mühendis / 2010 / Cilt: 17 - Sayı: 78

An investigation of damage initiation and progression properties in multi-layer woven carbon-epoxy composite materials in uni-axial tension

Çok katmanlı dokuma karbon-epoksi kompozit malzemelerde tek eksenli gerilme altında hasar başlama ve yayılma özelliklerinin araştırılması

Mehmet KARAHAN
Pages
6–14
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Full-field strain measurements highlight the relation between the strain concentrations that are linked with the damage initiation and the reinforcement structure.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Damage and mechanical properties in textile composites are closely connected with the textile reinforcement's internal structure.
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Key Findings & Data:This paper reports and discusses a study of the mechanical behavior and damage of a 2x2 twill woven carbon/epoxy composite resulting from uni-axial tension in the warp direction.
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Conclusion & Impact:Full-field strain measurements highlight the relation between the strain concentrations that are linked with the damage initiation and the reinforcement structure.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Damage and mechanical properties in textile composites are closely connected with the textile reinforcement's internal structure. This paper reports and discusses a study of the mechanical behavior and damage of a 2x2 twill woven carbon/epoxy composite resulting from uni-axial tension in the warp direction. A damage investigation was performed by using acoustic emission, full-field strain optical measurements, as well as X-ray and optical microscopy. As a result of the tests, the mechanical properties and strain values of the composite's damage threshold were determined. Damage initiation when loaded in the warp direction occurred between 0.2-0.3% of the applied strain. Microscopic examination showed that damage or cracks initiated where the yarn was crimped and at interactions between the warp and fill yarns. Full-field strain measurements highlight the relation between the strain concentrations that are linked with the damage initiation and the reinforcement structure.

Özet

Tekstil kompozitlerinde hasar ve mekanik özellikler, tekstil yapısı ile yakından ilgilidir. Bu makale, çok katmanlı 2x2 dimi karbon dokuma kompozitlerin, tek eksenli gerilim altında mekanik özelliklerini ve hasar başlama ve yayılma özelliklerini araştırmaktadır. Hasar araştırmaları, akustik emisyon kayıtları, tüm yüzeyli gerinim ölçümleri, x-ray ve optik mikroskop gözlemleri ile yapılmıştır. Testlerin sonucunda kompozitlerin mekanik özellikleri ve hasar başlama gerinim değerleri tespit edilmiştir. Çözgü doğrultusunda hasarın 0.2-0.3% gerinim düzeyinde başlayıp yayıldığı gözlenmiştir. Mikroskopik gözlemler hasarın, ipliklerin dokuma kumaş yapısında kıvrım aldıkları ve birbirleri ile kesiştikleri kısımlarda başladığını ve yayıldığını göstermiştir. Tüm yüzeyli gerinim ölçümleri ise, hasarın başlamasına neden olan gerilim konsanstrasyon bölgelerinin tekstil yapısına bağlı olduğunu göstermiştir.

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Cite This Article

KARAHAN, M. (2010). An investigation of damage initiation and progression properties in multi-layer woven carbon-epoxy composite materials in uni-axial tension. Tekstil ve Mühendis, Cilt: 17 - Sayı: 78, 6–14. https://ajindex.com/articles/366355

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References (4)

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