Bolted connections - design, selection, and optimization
Apply the guideline VDI 2230 safely
- Proof and calculation of highly stressed screw connections according to guideline VDI 2230
- Loads on a bolted connection - effects and findings
- Tightening and assembly processes - influences and processes
- Securing bolt connections - meaning and findings
On the subject
The steadily increasing competitive market requires innovative ideas in order to secure or expand your own market position. Increasing demands for compliance with CO2-neutral processes are challenges in the conceptual design of bolted connections. In addition to improving the functional properties, saving costs and weight of components are the key to innovations in vehicle, machine, and plant construction. Costly failures that can be traced back to a damage of bolted connections occur time and again. Such damage can be avoided through the standard-compliant calculation - and through design measures.
The VDI 2230 guideline has established itself worldwide as the calculation basis for the selection and verification of the strength of screws and bolt connections. The conformity of connecting elements and bolted constructions is increasingly required not only by testing organizations, but also by customers and suppliers.
In this seminar you will learn how to systematically design and calculate highly stressed bolt connections according to the VDI 2230 guideline. You will get an overview of the load-bearing capacity, structural design and assembly of screw connections. In addition, you will learn more about the special features that must be considered in the design measures for optimizing bolted connections that are not directly covered by the directive. In the practical examples, your awareness will be sharpened to correctly evaluate the causes and consequences of an automatic loosening as well as the application and the limits of screw or bolt locks and to find an optimal solution.
Introduction to the topic of screws
- Failure mechanisms of bolted connections
- Use of bolt locks
- Presentation of screw types and strength classes
- Scope and limits of the VDI guideline
- Force relationships and tension diagram e.g., clamping diagram
Calculation steps R0 to R6 according to VDI 2230 sheet 1
- Nominal diameter
- Tightening factor (torque, angle of rotation and yield point controlled tightening process)
- Pressure, loads from lateral forces / moments
- Operating force, bolt force and force ratio
- Loss of preloading force (amount of embedding and temperature dependencies)
- Calculated and permissible assembly preload
Proof of strength using calculation steps R7 to R13 and examples
- Safety margin against exceeding the yield point (maximum screw force, torsional moment)
- Safety margin against fatigue failure
- Safety margin against excessive surface pressure
- Minimum length of engagement (with maximum tensile forces)
- Safety margin against slipping and shearing (available residual clamping force)
- Tightening torque (influence of friction and lubrication)
- Constructive measures and design rules
- Examples from the VDI guideline
- Practical part I with “MDESIGN bolted joint, VDI 2230”
VDI 2230 Part 2
- Methods for determining the load distribution in a multibolted joint (rigid body, elastomechanical and FE approach)
- Torsional moment loaded screw fields, tensile load, moment load
- Elastomechanics - bedding
- Model classes for FE calculations
- FEM - Necessary calculation parameters for VDI sheet 1
- Practical part II with MDESIGN multibolt
- Overview: screw calculation according to Eurocode 3
Engineers and specialists from the fields of development, construction and calculation, teachers from educational institutions, specialists from research institutions and testing companies.
- First participant of a company: 790, - € (excl. VAT)
- Each additional participant from the same company: 580, - € (excl. VAT)
- University members (lecturers and students): 295, - € (excl. VAT)
When booking the seminars via the button on the right, only invoicing is offered as a payment method.
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Seminar on December 12 + 13:
You will receive detailed seminar documents and a certificate of attendance.
Dipl.-Ing. Heinz-Markus Höltermann
- Studied mechanical engineering at the Ruhr University Bochum and the University of Sheffield with a focus on construction and automation technology.
- Longstanding experienced seminar leader and MDESIGN trainer for leading national and international industrial companies
- Project and development engineer for machine elements and bolt calculations