Design Methodology for Bonded-Bolted Composite Joints. Volume I. Analysis Derivations and Illustrative Solutions


Book Description

This report contains recent developments in three aspects of joints in advanced fibrous composite structures: (1) nonlinear analysis of adhesively- bonded stepped-lap joints and doublers, (2) multirow mechanically fastened joints in aerospace structures, and (3) nonlinear analysis of combined bonded and bolted joints. The methods developed include nonlinearities needed for metal structures as well as those for composites. The analysis are based on continuum mechanics techniques and have been coded into three Fortran IV digital computer programs A4EI, A4EJ, and A4EK respectively. The report contains explanations of the derivations of the solutions as well as sample worked problems to illustrate both the capabilities of the programs and the behavior characteristics of the real structures.




Design Methodology for Bonded-Bolted Composite Joints


Book Description

Report Objectives: A4EI For Bonded Joints--Elastic-Plastic Adhesive Behavior; Stepped or Uniform Adherends; Variable Adhesive Thickness; Variable Adhesive Properties(Flaws and Porosity), and Residual Thermal Stresses. A4EJ For Bolted Joints--Load Sharing in Multirow Joints; Bearing/ByPass Interaction for Strength Prediction; Nonlinear Fastened Deflection Characteristics; Nonlinear Adhered Behavior, and Stepped or Uniform Members. A4EK For Bonded-Bolted Joints-All of the above features, except yielding adherends.







Composite Joints and Connections


Book Description

The growing use of composites over metals for structural applications has made a thorough understanding of the behaviour of composite joints in various applications essential for engineers, but has also presented them with a new set of problems. Composite joints and connections addresses these differences and explores the design, modelling and testing of bonded and bolted joints and connections.Part one discusses bolted joints whilst part two examines bonded joints. Chapters review reinforcement techniques and applications for composite bolted and bonded joints and investigate the causes and effects of fatigue and stress on both types of joint in various applications and environments. Topics in part one include metal hybridization, glass-reinforced aluminium (GLARE), hybrid fibre metal laminates (FML), glass fibre reinforced polymer (GFRP) and carbon fibre reinforced polymer (CFRP) composites. Topics in part two include calculation of strain energy release rates, simulating fracture and fatigue failure using cohesive zone models, marine and aerospace applications, advanced modelling, stress analysis of bonded patches and scarf repairs.Composite joints and connections is a valuable reference for composite manufacturers and composite component fabricators, the aerospace, automotive, shipbuilding and civil engineering industries and for anyone involved in the joining and repair of composite structures. - Explores the design, modelling and testing of bonded and bolted joints and connections - Reviews reinforcement techniques and applications for composite bolted and bonded joints - Investigates the causes and effects of fatigue and stress on bolted and bonded joints in various applications and environments







Recent Advances in Structural Joints and Repairs for Composite Materials


Book Description

Joints in components or structures incur a weight penalty, are a source of failure, cause manufacturing problems, and are unfortunately unavoidable in most structures ranging from aircraft, and spacecraft to ships and offshore platforms, to automobiles, bridges and buildings. An important requirement for the complete design of practical structures is the development of attachment methods and joint designs. Recent Advances in Structural Joints and Repairs for Composite Materials provides an up-to-date account of adhesively bonded and mechanically fastened joints and repairs. Audience: This book will prove to be an informative resource for all engineers and researchers involved with joining and repair of composite structures.




Interactive Composite Joint Design


Book Description

A computing technique was developed to determine the feasibility of combining the several batch computer programs for the analysis of composite joints into one interactive computer program utilizing graphics display. This approach proved successful and produced a design tool for the analysis of bolted or bonded composite joints. The program utilizes the software package provided by TEKTRONIX for the graphics display. The user works at the remote on-line graphics terminal in conjunction with the main computing facilities which contain the program. The final report discusses the summary, conclusion, and recommendations of the work performed. The User's Manual and Programming Manual discusses the input, output, and function of the program.




Stress Analysis and Strength Prediction of Adhesively Bonded Composite Joints


Book Description

The state of the art in the stress analysis and strength prediction of adhesively bonded composite joints is presented. A generalized coordinate finite element analysis based on rectangular, cylindrical and wedge solid elements is developed and utilized for the three-dimensional analysis of composite bonded joints. The comparison of results between 2-D and 3-D bonded joint analysis tools are made and their limitations are discussed. Further, the submodeling technique available in the commercial finite element package ABAQUS is explored to study the three-dimensional stress field in the vicinity of joint edges and debond cracks. The series of bolted joint design codes BONJO developed by Lockheed are incorporated into a PC based Bolted and Bonded Joint (BBJ) design methodology. The Bolted and Bonded Joint design tool is made more informative and user-friendly through the use of Windows 95TM based Graphic User Interfaces (GUIs) fully integrated with a material database and on-line help.