Analysis of fracture toughness of modified timber

Kyzioł, L.

doi:10.2478/v10012-010-0037-9

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…In another study Keledi et al, [15] found that fracture toughness of laminated composite increase with an increment of filler content. They also in an agreement with Pukanszky and Maurer [16] stated that the increment of the fracture toughness was due to the reduction of porosity of the materials. Fig.…”

Section: Fracture Toughnesssupporting

confidence: 85%

Fracture Toughness of Medium Molecular Weight Phenol Formaldehyde (MMwPF) Plywood

Aziz¹,

Khalid²

2020

ARASET

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Currently in Malaysia, most of the plywood industries are using tropical hardwood veneer with combination of rubberwood to form plywood. The used of rubberwood has actively reduced the cost of plywood production but recently the price of rubberwood logs has increased due to the shortage of the supply. Due to the demand from other timber industries such as furniture and medium density board thus, alternative raw material which is not focuses on lignocellulosic material only but also on the residue can be offered. Oil palm stems (Elaeisguineensis Jacq) need to be explored as these stems are abundant after falling from plantations which have not been fully utilized due to their poor properties. The main drawback of oil palm is its low dimensional stability found in the stem parts. Therefore this study investigated the 100% oil palm stem (OPS) plywood denoted as PTA by optimizing the pre drying process of the veneer by using roller pressing machine, steam dryer and platen press machine. After the OPS veneers have been pre-dried, they were treated with Medium Molecular Weight Phenol Formaldehyde (MMwPF) resin before fabrication of OPS plywood. The product could be promoted as concrete foam, light weight partitions, wall panel and floor slabs. The fracture toughness of OPS plywood developed in this study denoted as PTA was investigated. These properties were compared with the properties of another two types of commercial OPS plywood denoted as PTB and PTC which were manufactured using OPS veneer with tropical hardwood veneer for face and back veneer and control plywood denoted as PTD which was manufactured using 100% tropical hardwood veneer. The highest value of plain strain and energy release was showed by PTA compared to commercial plywood. The failure was more prominent in wood which showed by the crack propagated line in the veneer layer.

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Section: Fracture Toughnesssupporting

confidence: 85%

Fracture Toughness of Medium Molecular Weight Phenol Formaldehyde (MMwPF) Plywood

Aziz¹,

Khalid²

2020

ARASET

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“…Stress intensity factor (SIF) is one of such parameters that completely defines crack tip conditions, i.e. stress, strain and displacement values and can be connected with energy release rate G [6]. Three types of SIFs -Mode I (opening), II (in-plane shear) and III (outof-plane shear), can be recognized depending on the crack opening mode.…”

Section: Fracture Theorymentioning

confidence: 99%

Assessment of a Boat Fractured Steering Wheel

Vukelić

2016

Polish Maritime Research

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Game control methods in avoidance of ships collisions

Lisowski¹

2012

Polish Maritime Research

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The paper introduces application of selected methods of a game theory for automation of the processes of moving marine objects, the game control processes in marine navigation and the base mathematical model of game ship control. State equations, control and state constraints have been defined first and then control goal function in the form of payments -the integral payment and the final one. Multi-stage positional and multi-step matrix, non-cooperative and cooperative, game and optimal control algorithms in a collision situation has been presented. The considerations have been illustrated as an examples of a computer simulations mspg.12 and msmg.12 algorithms to determine a safe own ship's trajectory in the process of passing ships encountered in Kattegat Strait.

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Analysis of fracture toughness of modified timber

Abstract: Keywords: anisotropic material; energy release coefficient; stresss intensity factor; anisotropic material cracking properties both statical and dynamical in contrast to natural wood [1], therefore the determining of fracture toughness of the material has been deemed purposeful.

Cited by 3 publications

References 1 publication

Fracture Toughness of Medium Molecular Weight Phenol Formaldehyde (MMwPF) Plywood

Fracture Toughness of Medium Molecular Weight Phenol Formaldehyde (MMwPF) Plywood

Assessment of a Boat Fractured Steering Wheel

Game control methods in avoidance of ships collisions

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