Mississippi State University Scholars Junction Theses and Dissertations Theses and Dissertations 1-1-2012 Static and Fatigue Performance of Oriented Strandboard as Upholstered Furniture Frame Stock Samet Demirel Follow this and additional works at: https://scholarsjunction.msstate.edu/td Recommended Citation Demirel, Samet, "Static and Fatigue Performance of Oriented Strandboard as Upholstered Furniture Frame Stock" (2012). Theses and Dissertations. 4046. https://scholarsjunction.msstate.edu/td/4046 This Dissertation - Open Access is brought to you for free and open access by the Theses and Dissertations at Scholars Junction. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of Scholars Junction. For more information, please contact [email protected]. Template Created By: James Nail 2010 STATIC AND FATIGUE PERFORMANCE OF ORIENTED STRANDBOARD AS UPHOLSTERED FURNITURE FRAME STOCK By Samet Demirel A Dissertation Submitted to the Faculty of Mississippi State University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Forest Products in the Department of Forest Products Mississippi State, Mississippi May 2012 Template Created By: James Nail 2010 Copyright 2012 By Samet Demirel Template Created By: James Nail 2010 STATIC AND FATIGUE PERFORMANCE OF ORIENTED STRANDBOARD AS UPHOLSTERED FURNITURE FRAME STOCK By Samet Demirel Approved: _________________________________ _________________________________ Jilei Zhang David Jones Professor of Forest Products Assistant Extension Professor of Forest (Director of Dissertation) Products (Committee Member) _________________________________ _________________________________ Shane Kitchens William V. Martin Assistant Professor of Forest Products Director of Franklin Furniture (Committee Member) Institute _________________________________ _________________________________ Tor P. Schultz George M. Hopper Professor of Forest Products Dean of College of Forest Resources (Graduate Coordinator) Template Created By: James Nail 2010 Name: Samet Demirel Date of Degree: May 11, 2012 Institution: Mississippi State University Major Field: Forest Products Major Professor: Jilei Zhang Title of Study: STATIC AND FATIGUE PERFORMANCE OF ORIENTED STRANDBOARD AS UPHOLSTERED FURNITURE FRAME STOCK Pages in Study: 175 Candidate for Degree of Doctor of Philosophy This study investigated the lateral shear resistance of multi-staple joints, static and fatigue bending moment resistances of stapled gusset-plate joints, and fatigue bending performance of full size sofa structural members in three oriented strandboard (OSB) materials. It is concluded that the lateral shear resistance capacity of multi-staple joints in OSB can be predicted with power equations including single-staple lateral resistance capacity, number of staples, and material density. The bending moment resistance of stapled gusset plate joints in OSB can be predicted by mechanical models including the lateral resistance property of multi-staple joints. The static moment capacity study of a gusset-plate joint concluded that its maximum moment resistance is 2 times of its corresponding proportional limit moment resistance. Experimental results indicated that there was no significant difference in lateral shear resistance among vertically-aligned multi-staple joints constructed of three OSB materials even though there were significant differences in lateral resistance among single-staple joints in these three materials. Template Created By: James Nail 2010 However, there were significant differences in lateral resistances among horizontally- aligned multi-staple joints in three OSB materials. Fatigue test results concluded that the ratio of static to passed fatigue moment capacity of gusset-plate joints was 2.6. The proposed equations reasonably estimated fatigue life of less brittle OSB materials subjected to cyclic stepped and constant fatigue loads but underestimated the brittle OSB material. The ratios of material modulus of rupture to passed fatigue stress were 2.17 and 2.25 for cyclic stepped and constant cyclic tests, respectively. Key words: OSB, static, fatigue, upholstered, furniture frame, gusset plate, staple, GSA, BIFMA, moment, standard. DEDICATION I dedicate this dissertation to my family: my parents Ismail Hakki Demirel (RIP) and Fikriye Demirel; sisters Atika Nur Balta and Tugba Koral; brother Hakan Demirel for their irrecoverable efforts and supports on me. I also dedicate this dissertation to my niece Hatice K. Balta; nephews Mustafa F. Balta and Enes Koral; Brothers in law Mehmet A. Balta and Veysel Koral. I am honored to dedicate this dissertation to Turkish Government which provided me the opportunity to have a degree and many life experiences from abroad and financially supported my study for all these years. I am also honored to dedicate this dissertation to Turkish People. ii ACKNOWLEDGEMENTS I am and will be always grateful to my major professor, Dr. Jilei Zhang, whose plenty experiences, logical way of the thinking, encouragement, and guidance during the my entire doctorate program. His wide knowledge and critical contributions made a good basis on this dissertation. I would like to give my sincere thanks to my committee, Dr. David Jones, Dr. Shane Kitchens, from Mississippi State University, and Mr. William V. Martin, from Franklin Furniture Institution for their considerable review and perfect recommendations during the preparation of my proposal and dissertation. I especially desire to extend my words of thanks to Mr. Franklin Quin Jr. for his indispensible guide, help, valuable suggestion on every single period of my study. I would also like to give my appreciations to Mr. Bob Tackett for his valuable help and necessary advices on my experiments in the laboratories. I would like to express my deep appreciation to my colleague, Mr. Onder Tor, for his significant statistical consulting and the rest of his help on my work. I wish to express my sincere thanks to the faculty and staff of the Mississippi State University Forest Products Department. I also wish to give my sincere appreciation to Forest Products Department Head, Dr. Rubin Shmulsky, for his permanent warm smiling face and essential helps during my entire education program. iii TABLE OF CONTENTS Page DEDICATION .................................................................................................................... ii ACKNOWLEDGEMENTS ............................................................................................... iii LIST OF TABLES ............................................................................................................. ix LIST OF FIGURES ........................................................................................................ xvii CHAPTER I. INTRODUCTION .............................................................................................1 1.1 Problem Statement .................................................................................1 1.2 Literature Review...................................................................................3 1.2.1 Sofa Frame Structural Systems ........................................................3 1.2.2 Frame Performance Tests ................................................................4 1.2.3 Joint Static and Fatigue Resistances ................................................8 1.2.3.1 Static Resistance ..................................................................8 1.2.3.2 Staple-Connected Gusset-Plate Joints ..................................8 1.2.3.3 Face Lateral Shear Resistance of Staple-Connected Joints ..................................................................................12 1.2.3.4 Lateral Shear Resistance of Glued Face-to-Face Joints ..................................................................................14 1.2.3.5 Neutral Axis .......................................................................14 1.2.3.6 Fatigue Resistance .............................................................17 1.2.4 Fatigue Resistance Properties of Wood-based Composites as Furniture Frame Members .........................................................20 1.2.4.1 Fatigue Test ........................................................................20 1.3 Objectives ............................................................................................21 II. STATIC LATERAL SHEAR RESISTANCE OF STAPLED AND GLUED FACE-TO-FACE JOINTS ................................................................24 2.1 Materials and Methods .........................................................................24 2.1.1 Approach ........................................................................................24 2.1.2 Specimen Configurations ...............................................................24 2.1.3 Materials ........................................................................................25 iv 2.2 Experimental Design ............................................................................29 2.2.1 One-Row Vertically-Aligned Multi-Staple Joints .........................29 2.2.2 Two-Row Vertically-Aligned Multi-Staple Joints .........................30 2.2.3 Two-Row Horizontally-Aligned Multi-Staple Joints ....................31 2.2.4 Glued Joints ...................................................................................32 2.3 Specimen Preparations .........................................................................33