Masif odun ve kontrplakların eğilme testinde gerinim dağılımlarının dijital görüntü korelasyonu ile belirlenmesi

Year 2017, Volume: 17 Issue: 2, 354 - 361, 28.09.2017

TİMUÇİN Bardak , Selahattin Bardak , Eser Sözen

https://doi.org/10.17475/kastorman.328188

Cited By: 1

Abstract

Özet

Çalışmanın amacı: Bu çalışmada, kayın (Fagus
orientalis L.), meşe (Quecus robur)
ve kayın kaplamalardan elde edilen kontrplakların eğilme testinde yer
değiştirme ve gerinim alanları dijital görüntü korelasyonu yöntemiyle karşılaştırılması
amaçlanmıştır.

Materyal ve Yöntem: Ahşap malzeme olarak kayın (Fagus
orientalis L.), meşe (Quercus robur)
ve kayın kaplamalardan elde edilen kontrplaklar kullanılmıştır. Daha sonra,
test numunelerinin yoğunlukları ve eğilme dirençleri hesaplanmıştır.  Dijital
görüntü korelasyon analizi, bir numunenin yüzeydeki yer değiştirmeyi çözmek
için kullanıldı. Malzemenin deformasyonu numune yüzeyindeki işaretlerin yer
değiştirmesini izleyerek elde edilebilir.

Sonuçlar: Yapılan çalışmalar sonucu en yüksek statik eğilme direnci kayın malzemede,
en düşük ise kontrplakda bulunmuştur. Dijital görüntü korelasyon analizi masif
malzeme ve kontrplak da eğilme davranışını anlamamıza yardımcı olan gerilme ve
yer değiştirmenin tespitinde etkili bir tekniktir.

Araştırma vurguları: Bu araştırmanın sonuçları, Dijital görüntü korelasyonu tekniğinin farklı
odun kompleks yapılarındaki tam alan deformasyonlarını ölçebildiğini
göstermektedir. Ahşap mühendisliği alanında sınırlı DIC çalışması nedeniyle
gelecekte daha kapsamlı çalışmalara ihtiyaç vardır.

Keywords

Gerinim dağılımı, Masif odun, Kontrplak, Görüntü analizi

Determination of Strain Distributions of Solid Wood and Plywood in Bending test by Digital Image Correlation

Abstract

Abstract

Aim of study: In this study, it is aimed to compare displacement
and strain fields of the plywood obtained from fagus coverings, oak (Quecus robur) and beech (Fagus orientalis L.)  by digital image correlation method.

Material and
Methods: As wood material, beech (Fagus orientalis L.), oak (Quecus
robur) and plywood obtained from fagus veneers were used. Then the densities
and modulus of ruptures of the test specimens were calculated. Digital Image
Correlation Analysis (DIC) was developed to resolve the displacement on the
surface of a specimen. Deformation of the material can be achieved by tracking
the displacement of markers on the sample surface.

Main results: The results of the studies were found to be the
highest static bending strenght in beech material and the lowest in plywood.
The DIC technique is effective in detecting the displacement and strain, which
helps to understand the bending behavior of solid wood and plywood

Research highlights: The
results from this research indicate that the DIC technique is capable of
measuring full-field deformations in different wood complex structures.  Due to limited DIC study in the field of wood
engineering, there is a need for more extensive work in the future

Keywords

Stress distribution, Solid wood, Plywood, image analysis

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