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On the Mechanics of the Bow and Arrow 1
On the Mechanics of the Bow and Arrow 1 B.W. Kooi Groningen, The Netherlands 1983 1B.W. Kooi, On the Mechanics of the Bow and Arrow PhD-thesis, Mathematisch Instituut, Rijksuniversiteit Groningen, The Netherlands (1983), Supported by ”Netherlands organization for the advancement of pure research” (Z.W.O.), project (63-57) 2 Contents 1 Introduction 5 1.1 Prefaceandsummary.............................. 5 1.2 Definitionsandclassifications . .. 7 1.3 Constructionofbowsandarrows . .. 11 1.4 Mathematicalmodelling . 14 1.5 Formermathematicalmodels . 17 1.6 Ourmathematicalmodel. 20 1.7 Unitsofmeasurement.............................. 22 1.8 Varietyinarchery................................ 23 1.9 Qualitycoefficients ............................... 25 1.10 Comparison of different mathematical models . ...... 26 1.11 Comparison of the mechanical performance . ....... 28 2 Static deformation of the bow 33 2.1 Summary .................................... 33 2.2 Introduction................................... 33 2.3 Formulationoftheproblem . 34 2.4 Numerical solution of the equation of equilibrium . ......... 37 2.5 Somenumericalresults . 40 2.6 A model of a bow with 100% shooting efficiency . .. 50 2.7 Acknowledgement................................ 52 3 Mechanics of the bow and arrow 55 3.1 Summary .................................... 55 3.2 Introduction................................... 55 3.3 Equationsofmotion .............................. 57 3.4 Finitedifferenceequations . .. 62 3.5 Somenumericalresults . 68 3.6 On the behaviour of the normal force -
Assessing the Performance of Bamboo Structural Components
ASSESSING THE PERFORMANCE OF BAMBOO STRUCTURAL COMPONENTS by Michael J. Richard Bachelor of Science, Worcester Polytechnic Institute, 2008 Master of Science, Worcester Polytechnic Institute, 2009 Submitted to the Graduate Faculty of The Swanson School of Engineering in partial fulfillment of the requirements for the degree of Doctor of Philosophy University of Pittsburgh 2013 UNIVERSITY OF PITTSBURGH SWANSON SCHOOL OF ENGINEERING This dissertation was presented by Michael J. Richard It was defended on June 5, 2013 and approved by Melissa Bilec, Ph.D., Assistant Professor, Civil and Environmental Engineering John Brigham, Ph.D., Assistant Professor, Civil and Environmental Engineering Khosrow Ghavami, Ph.D., Full Professor, Civil Engineering, PUC-Rio C. Drew Armstrong, Ph.D., Associate Professor, Architectural Studies Dissertation Director: Kent A. Harries, Ph.D., Associate Professor, Civil and Environmental Engineering ii Copyright © by Michael J. Richard 2013 iii ASSESSING THE PERFORMANCE OF STRUCTURAL BAMBOO COMPONENTS Michael J. Richard, Ph.D. University of Pittsburgh, 2013 Bamboo has been a traditional construction material in many regions for centuries. The rapid growth and maturation rate of bamboo as well as its good strength properties and global accessibility make it a promising non-conventional building material resource. However, due to limited standardization and design criteria, bamboo has often been relegated to non-engineered and marginally-engineered construction. The current study assesses the performance of full-culm structural bamboo components and appropriate standard material and member test methods. A brief overview is given to the motivation for the study of structural bamboo, placing the work in its social context, followed by background on the properties of bamboo and the structural applications of the material as well as the pathway to its further standardization and utilization. -
Engineered Bamboo for Structural Applications
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/272846799 Engineered bamboo for structural applications Article in Construction and Building Materials · April 2015 DOI: 10.1016/j.conbuildmat.2015.01.077 CITATIONS READS 46 1,904 4 authors: Bhavna Sharma Ana Gatóo University of Bath University of Cambridge 22 PUBLICATIONS 243 CITATIONS 10 PUBLICATIONS 98 CITATIONS SEE PROFILE SEE PROFILE Maximilian Bock Michael Ramage University of Cambridge University of Cambridge 8 PUBLICATIONS 94 CITATIONS 48 PUBLICATIONS 213 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Engineered Bamboo View project Laser Induced Growth of Carbon Nanotubes View project All content following this page was uploaded by Bhavna Sharma on 07 September 2015. The user has requested enhancement of the downloaded file. Construction and Building Materials 81 (2015) 66–73 Contents lists available at ScienceDirect Construction and Building Materials journal homepage: www.elsevier.com/locate/conbuildmat Engineered bamboo for structural applications ⇑ Bhavna Sharma , Ana Gatóo, Maximilian Bock, Michael Ramage Department of Architecture, University of Cambridge, Cambridge, UK highlights Relevance of engineered bamboo products to construction and industry. Mechanical characterisation of bamboo scrimber and laminated bamboo is presented. Bamboo scrimber is shown to have similar strength to laminated bamboo. Engineered bamboo products have properties that are equal to or surpass that of timber. article info abstract Article history: Bamboo is a rapidly renewable material that has many applications in construction. Engineered bamboo Received 24 September 2014 products result from processing the raw bamboo culm into a laminated composite, similar to glue- Received in revised form 27 January 2015 laminated timber products. -
Bamboo in the Circular Economy
Policy Synthesis Report 6 Bamboo in the Circular Economy The potential of bamboo in a zero-waste, low-carbon future Cover image: Lior Teitler | MOSO Pablo van der Lugt1,2 Charlotte King3 1. Delft University of Technology; 2. Moso International BV; 3. The International Bamboo and Rattan Organisation International Bamboo and Rattan Organisation The International Bamboo and Rattan Organisation, INBAR, is an intergovernmental organisation dedicated to the promotion of bamboo and rattan for sustainable development. About this report This research was carried out by the International Bamboo and Rattan Organisation (INBAR) as part of the CGIAR Research Program on Forests, Trees And Agroforestry (FTA). FTA is the world’s largest research for development programme to enhance the role of forests, trees and agroforestry in sustainable development and food security and to address climate change. CIFOR leads FTA in partnership with Biodiversity International, CATIE, CIRAD, INBAR, ICRAF and TBI. FTA’s work is supported by the CGIAR Trust Fund: http://www.cgiar/org/ funders Copyright and Fair Use: This publication is licensed for use under Creative Commons Attribution-Non-commercial-Share Alike 3.0 Unported Licence (CC BY-NC-SA 3.0). To view this licence visit: http://creativecommons.org/licences/by-nc-sa/3.0/ You are free to: Share — copy and redistribute the material in any medium or format; and Adapt — remix, transform, and build upon the material. The licensor cannot revoke these freedoms as long as you follow the licence terms. Under the following terms: Attribution: You must give appropriate credit, provide a link to the licence, and indicate if changes were made. -
Slimline Standard Inswing Door WA8400 (Rev
Slimline Standard Inswing Door WA8400 (rev. 02.06.18) Copyright © 2018 Reveal Windows & Doors All rights reserved. No part of this manual may be reproduced or transmitted in any form or by any means without permission by Reveal Windows & Doors. Slimline Standard Inswing Door WA8400 (rev. 02.06.18) Slimline Standard Inswing Door WA8400 Section Contents Product Overview ...................................................................................................................................................................................... 3 Introduction ................................................................................................................................................................................................................ 3 Hardware Options ....................................................................................................................................................................................................... 3 Glazing Options ........................................................................................................................................................................................................... 3 Wood Species .............................................................................................................................................................................................................. 3 Hardware Images ....................................................................................................................................................................................................... -
Inset Cabinet Doors Create the Perfect Fit by Trimming One Side at a Time
Master Carpenter How to Install Inset Cabinet Doors create the perfect fit by trimming one side at a time BY SCOTT GIBSON aking and fitting cabinet doors takes time, and it has its occasional frustrations. Still, install- ing doors correctly is one of the real pleasures of cabinetmaking. if everything isn’t flat and Msquare or if the hinges aren’t installed properly, the doors won’t work the way they should. For an overlay cabinet door, the process is more forgiving: The door simply closes against the cabinet or face frame. an inset door is another story. it has to be trimmed to fit the door opening exactly, with an even gap all around between the face frame and the door. i like the appearance of inset doors because they don’t look as clunky as overlay doors. When an inset door is fitted cor- THE CRAFTSMAN Woodworker and writer Scott Gibson lives in East Waterboro, Maine. A former newspaper reporter, Scott worked as an editor at Fine Homebuilding before becoming editor in chief of Home Furniture and then Fine Woodworking. In addition to being a journalist, he’s had a lifelong passion for woodworking that’s yielded a whole house full of furniture. Scott and his wife, Susan, moved back to Maine in 2001, and after his new house was finished, he built a good shop. When his son Ben renovated the kitchen in his own house, Scott pitched in for the cabinets, which is where we caught up with him. 64 FiNE HOmEBUilDiNG photos this page: Nat rea COPYRIGHT 2012 by The Taunton Press, Inc. -
Evaluation of Uniformity of Bamboo Bundle Veneer and Bamboo Bundle Laminated Veneer Lumber (BLVL)
Article Evaluation of Uniformity of Bamboo Bundle Veneer and Bamboo Bundle Laminated Veneer Lumber (BLVL) Haiying Zhou 1 , Xin Wei 1, Lee M. Smith 2, Ge Wang 1 and Fuming Chen 1,* 1 Key Laboratory of Bamboo and Rattan Science and Technology of the State Forestry Administration, Department of Bio-Materials, International Centre for Bamboo and Rattan, Beijing 100102, China; [email protected] (H.Z.); [email protected] (X.W.); [email protected] (G.W.) 2 Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203-1277, USA; [email protected] * Correspondence: [email protected]; Tel.: +86-010-847-8743 Received: 3 September 2019; Accepted: 17 October 2019; Published: 19 October 2019 Abstract: The lack of an effective and practical quality control method for industrialized bamboo bundle veneers is the key restriction in the application of bamboo bundle composite materials in the field of construction. In this work, the density uniformity and mechanical properties of bamboo bundle veneers were systematically evaluated by the combination of light transmittance and mechanical stiffness. It was found that the number of broomings, dippings, and high-temperature heat treatments had different effects on the bamboo bundle veneers. On this basis, the uniformity of the density and mechanical properties of the bamboo scrimber (BS) that underwent hybrid paving, and the bamboo bundle laminated veneer lumber (BLVL), were analyzed. The results showed that the performance stability of bamboo bundle composites could be greatly improved by bamboo bundle veneer laminated paving. A large-scale quality evaluation system for bamboo bundle veneers was established in this work, and it provides conditions for the manufacture of bamboo bundle composites with stable and controllable performance. -
Tesoro Woods Engineered Bamboo, Solid Bamboo and Eucalyptus Installation Instructions
Tesoro Woods Engineered Bamboo, Solid Bamboo and Eucalyptus Installation Instructions Please read this entire document carefully before proceeding with the installation of your flooring. Contents BEFORE INSTALLATION BEGINS ................................................................................................................................... 2 Important Information To Know Before You Begin .................................................................................................. 2 Jobsite Requirements ............................................................................................................................................. 3 Acceptable Subfloor Types...................................................................................................................................... 4 Subfloor Preparation .............................................................................................................................................. 5 How to Test a Concrete Subfloor for Moisture ......................................................................................................... 6 Acclimation ............................................................................................................................................................ 6 Installation Over Radiant Heat Systems................................................................................................................... 7 Required Tools & Supplies - GENERAL .................................................................................................................... -
Architectural Woodwork Standards, 2Nd Edition
Architectural Woodwork Standards WALL/CEILING SURFACING & PARTITIONS 8S E C T I O N SECTION 8 Wall/Ceiling Surfacing and Partitions table of contents INTRODUCTORY INFORMATION COMPLIANCE REQUIREMENTS Guide Specifications ...........................................................................194 GENERAL Introduction .........................................................................................195 Basic Considerations ....................................................................212 Wall and Ceiling Surfacing ..................................................................195 Grades .....................................................................................212 Opaque .........................................................................................195 Economy ...........................................................................212 Transparent ..................................................................................195 Custom ..............................................................................212 Contract Documents ...........................................................................195 Premium ............................................................................212 Product Advisory .................................................................................195 Grade Limitations ..............................................................212 Panel Sequence ..................................................................................196 Contract Documents -
Boral Building Products Inc
So Authentic. So Reliable. Nothing Compares. TruExterior® Siding & Trim is in a class of its own, invented to address issues common with other exterior products on the market. It’s a siding material that offers a high level of dimensional stability to help reduce expansion and contraction. Plus, TruExterior resists water, making it ideal for applications with ground or masonry contact. TruExterior gives builders the freedom to build beautiful homes with confidence. Pictured: Shiplap, Channel Bevel On the Cover: Nickel Gap, Channel 2 So Authentic.So Reliable. Nothing Compares. 3 4 Phenomenal Performance. Remarkable Workability. TruExterior® Siding & Trim offers both and a lasting look while eliminating the need for gluing, gapping and other cumbersome and costly installation techniques. APPLICATION Designed for use in non-structural applications Suitable for ground contact Can be used in moisture-prone areas Installation is the same regardless of the season TOOLS Installed using proven woodworking tools and methods Carbide-tipped blades and bits are recommended for a longer tool life FASTENING Accepts a wide variety of high-quality exterior-grade fasteners that are suitable for the local environment Can be fastened close to the edge No need for pre-drilling No mushrooming PAINTING TruExterior® products come pre-primed and do require paint No need to prime end cuts Can be painted with any high-grade exterior paint when following the paint manufacturer’s instructions Can be painted any color without special precautions as it is not prone to movement caused by heat gain from dark colors* Paint lasts longer than on wood because TruExterior® products cycle virtually no moisture* Traditional exterior-grade caulks, auto-body or wood fillers are all acceptable for filling nail holes *Please see TruExterior® Siding & Trim Limited Warranties and Product Data Sheets for proprietary test results, located at TruExterior.com. -
Mechanical Properties of Oriented Bamboo Scrimber Boards Made of Phyllostachys Pubescens (Moso Bamboo) from Taiwan and China As
Holzforschung 2018; 72(2): 151–158 Min-Jay Chung and Sheng-Yang Wang* Mechanical properties of oriented bamboo scrimber boards made of Phyllostachys pubescens (moso bamboo) from Taiwan and China as a function of density https://doi.org/10.1515/hf-2017-0084 properties, spring back behavior (SB), static modulus of Received May 18, 2017; accepted September 11, 2017; previously elasticity (MOE), water absorption (WA%) published online October 17, 2017 Abstract: The properties of oriented bamboo scrimber boards (OBSB) have been investigated at three density Introduction levels (0.8, 0.9, and 1.0 g cm3), while the boards were made from moso bamboo (Phyllostachys pubescens) Bamboo is a renewable natural resource, which is grown in Taiwan (T-OBSB) and China (C-OBSB). A non- widely used due to its excellent properties, such as destructive technique (NDT), ultrasonic-wave velocity rapid growth, good flexibility and its short production (Vu) measurements were applied and the dynamic modu- period. Moreover, bamboo has a high CO2 sequestra- lus of elasticity (MOEdyn) was calculated. Moreover, static tion efficiency. A variety of bamboo culm utilizations modulus of elasticity (MOE), modulus of rupture (MOR), are attracting increasing global attention (Khalil et al. profile density distribution, internal bond strength (IB), 2012). Among others, moso bamboos (Phyllostachys springback (SB), and dimensional stability were deter- pubescence and Phylostachys sp.) have very interesting mined based on traditional methods. Positive linear mechanical, anatomical and chemical properties. This is relationships between density and Vu, MOEdyn, MOE and the reason why moso bamboo is the focus of intensive MOR were observed, no matter if the measurements were basic and applied research concerning their physical and done parallel (//) or perpendicular (⊥) to the fiber direc- chemical properties (Qu et al. -
University of California, San Diego
UNIVERSITY OF CALIFORNIA, SAN DIEGO Fiber Adhesion and interactions of Vessel Distribution and Density in the Impact Resistance of Wood A Thesis submitted in partial satisfaction of the requirements for the degree Master of Science in Materials Science and Engineering by Albert Keisuke Matsushita Committee in Charge Professor Joanna M. McKittrick, Chair Professor Shengqiang Cai Professor Marc Meyers 2017 The Thesis of Albert Keisuke Matsushita is approved and it is acceptable in quality and form for publication on microfilm and electronically: Chair University of California, San Diego 2017 iii Table of Contents Signature Page ................................................................................................................... iii Table of Contents ............................................................................................................... iv List of Figures .................................................................................................................... vi List of Tables ................................................................................................................... viii Acknowledgements ............................................................................................................ ix Abstract of the Thesis ................................................................................................ xi—xii 1 Introduction ..................................................................................................................... 1 2 Background