UCLA Extension

Fastener Joint Design and Analysis

A vast majority of mechanical hardware failures come from joints coming loose during its operating environment and can get very costly. Learn fundamental concepts and practical instruction in design and analysis of all bolted joints and the principle methods to avoid the classic problems. This course includes industry accepted rule of thumb, thread types/classes and thread forms plus history of threads.

The vast majority of mechanical hardware failures are caused by joint coming loose during its operating environment. Joint failure can be very costly to any space, tactical or aerospace assemblies and many programs cannot bear the cost. This course presents both fundamental concepts and practical instruction in design and analysis of all joints and provide to the engineers the understanding of the bolted joint and the classical problems usually encounter and principle method to avoid it.

Complete Details

The course opens up with a discussion of bolted joint design concept, principle, definition, attachment methods and joint modes of failures. Some of well-known world historical disasters events which ended up with loss of many human lives caused by lake of understanding of bolted joint will also be discussed. Throughout the course the proper threads type, washers, head types, joint materials (screw, insert, washer and flanges), lubricant and primary/secondary locking mechanisms will be covered in detail. Geometric dimensioning and tolerancing (GT&D) of the joint design and all different torque tools tolerances will be discussed as well.

This course provides an in-depth understanding of the fastener joints in order to insure the integrity of all different types of fastener joints will be intact during its service life.

Overview and Fundamentals
Basic understanding of bolted joint design and objective including industry accepted rule of thumb, thread types/classes and thread forms plus history of threads will be studied. Screw material/types, head types washers types/material and their use for the design application plus bolted joint classical problems, primary and secondary locking mechanisms will be studied.

Generation of Torque/Preload Values
Fundamental generation of correct torque value ranges for metallic/composite joints, related max/min preload (clamp load), joint diametric tolerance, effect of number of insertion, torqueing patterns and sequences, effect of extreme temperature on the joints.

Generation of Joint Flight Loads
Generation static, dynamic loads, calculation of joint stiffness, and percent flight load transfer through the bolt, percent torque transfer to tensile loads, sizing joint screw, example problems and failure case studies.

Coordinator and Lecturer

Joe Ziary, MS, Mechanical Engineer. Joe has over 28 years of experience in mechanical design, structural stress analysis, Structural dynamists and qualification/verification testing of space, airborne and tactical hardware’s. Joe holds the position as a Senior Principal Mechanical Engineer working as a senior technical lead in the area of space, airborne and tactical systems design and analysis for the mechanical components Joe is a considered a Raytheon Subject Matter Expert (SME) in Bolted Joint Design, Vibration test fixtures and structural

His educational background includes a BS and MS in Mechanical Engineering from Wichita State University. In addition to Joe’s career as a structural analyst, he has also served various other roles which includes design engineering, structural/dynamics analyst, and test engineer. These experiences has given Joe unique experiences over a wide range of projects including aircraft fuselage and landing gear design, thrust reverser design and projects for space environments such as weather and surveillance satellites.

Lastly, Joe has also developed and instructs the course “Stress Analysis Concepts for Designers” for Raytheon’s Advanced Technical Education Program (ATEP) which teaches engineers topics regarding design loads (space, tactical and airborne), stiffness and load path, random/sine and shock vibration, test fixture design, variation and shock testing for the past ten years. In addition, he also routinely teaches another RLI course “Basic Bolted Joint Design” at Raytheon facilities nationwide.

For more information contact the Short Course Program Office:
shortcourses@uclaextension.edu | (310) 825-3344 | fax (310) 206-2815