نتایج جستجو برای: rupture modulus

تعداد نتایج: 67395  

2011
Fangchao Cheng Yingcheng Hu

The safety of timber structure design based on the predicted Modulus of Rupture (MOR) of poplar lumber with nondestructive methods is presented in this paper. Dynamic Modulus of Elasticity (MOE) of poplar lumber was measured with three different nondestructive methods, and static MOE and MOR were obtained by a static bending test. The regression relationship between various MOE and MOR was eval...

Journal: :Annals of botany 2003
Richard Jagels George E Visscher John Lucas Barry Goodell

The xylem of Metasequoia glyptostroboides Hu et Cheng is characterized by very low density (average specific gravity = 0.27) and tracheids with relatively large dimensions (length and diameter). The microfibril angle in the S2 layer of tracheid walls is large, even in outer rings, suggesting a cambial response to compressive rather than tensile stresses. In some cases, this compressive stress i...

Journal: :Acta biomaterialia 2010
C R Carlisle C Coulais M Guthold

Knowledge of the mechanical properties of electrospun fibers is important for their successful application in tissue engineering, material composites, filtration and drug delivery. In particular, electrospun collagen has great potential for biomedical applications due to its biocompatibility and promotion of cell growth and adhesion. Using a combined atomic force microscopy (AFM)/optical micros...

2008
Hui Pan Todd F Shupe Chung-yun Hse

Compression molded composites were made from wood particles and a liquefied wood/phenol/formaldehyde co-condensed resin. Based on our previous research, a phenol to wood (P1W) ratio of 2/1 was chosen for this study. The two experimental variables selected were: 1) liquefaction temperature (1500 and 180°C) and 2) cooking method (atmospheric and sealed). Panels were tested in static bending for m...

2008
Stephan Frybort Raimund Mauritz Alfred Teischinger Ulrich Müller

Over the last years promising cement bonded wood composites for structural purposes have evolved. Durability, toughness, high dimensional stability, resistance against environmental influences such as biodegradation or weathering but also availability of the raw material as well as economic factors are features which can make cement-bonded composites superior to conventionally bonded composites...

2005
S. J. A. Koh H. P. Lee C. Lu Q. H. Cheng

Molecular dynamics (MD) simulation was performed on an fcc solid platinum nanowire in this study. Infinite one-dimensional nanowires of circular and rectilinear cross sectional shapes were subjected to uniaxial tensile strain, and simulated at temperatures of 50K and 300K. The constitutive stress-strain response of the nanowire was investigated, the changes in crystal structure during axial def...

2013
Abdurrahim Dusak Kaan Kamasak Cemil Goya Mehmet E. Adin Mehmet A. Elbey Aslan Bilici

BACKGROUND A risk factor assessment that reliably predicts whether patients are predisposed to intracranial aneurysm (IA) rupture has yet to be formulated. As such, the clinical management of unruptured IA remains unclear. Our aim was to determine whether impaired arterial distensibility and hypertrophic remodeling might be indicators of risk for IA rupture. MATERIAL/METHODS The study populat...

2013
Ali Hemmasizadeh Soroush Assari Mobin Rastgar Agah Michael Autieri Kurosh Darvish

Traumatic aortic rupture is a significant cause of death in motor vehicle accidents with aortic injuries leading to 20% fatality in motor vehicle crashes. The knowledge of the material properties of aortic wall is fundamental to the understanding of aorta rupture mechanisms and how a local tear propagates through the aortic wall. It is believed that non-fatal injuries may also lead to long-term...

Journal: :Turkish Journal of Agricultural and Natural Science 2022

In this study, ironwood (Casuarina equisetifolia L.) raw material was used. 1.17 moles of urea-formaldehyde (UF) resin (12.5%), solid paraffin (1.5%) and 10% ammonium chloride solution were added to the fibers. Boards with a density 0.694 g/cm³ produced in MDF production line. The physical mechanical properties boards evaluated. Swelling thickness for 2 24 h 2.53% 6.01%, respectively. Modulus r...

Journal: :Acta biomaterialia 2016
Ambroise Duprey Olfa Trabelsi Marco Vola Jean-Pierre Favre Stéphane Avril

UNLABELLED Although hundreds of samples obtained from ascending thoracic aortic aneurysms (ATAA) of patients undergoing elective surgical repair have already been characterized biomechanically, their rupture properties were always derived from uniaxial tensile tests. Due to their bulge shape, ATAAs are stretched biaxially in vivo. In order to understand the biaxial rupture of ATAAs, our group d...

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