Strength Assessments with Superimposed Loading and Component Contact - Fatigue Analysis with Multi-Axiality

Introduction

Ensuring sufficient strength is of crucial importance in the construction and design of drive components, especially when these components are exposed to superimposed loads. This aspect is becoming increasingly relevant in view of the growing demands on the performance, efficiency and reliability of machines and systems. Understanding the multiaxial stress conditions and material properties is fundamental to strength calculation and enables reliable dimensioning.

On the one hand, nominal stress-based calculation approaches offer a practical and quick method for evaluating component strength, taking into account safety factors and standard specifications. The influence of multi-axiality is usually roughly estimated here.
On the other hand, a local fatigue analysis is carried out for a detailed analysis of critical component areas. With the local stress components usually determined in FE-based component models, higher-quality strength hypotheses can be applied compared to the nominal stress-based approach, which can also locally map complicated failure mechanisms, for example in component contacts.
When does it make sense to use resource-intensive methods for strength verification? 
How can superimposed loads be reliably designed using quick and simple methods?
These are some of the questions we want to address in the planned seminar. 

Target Audience

Calculation engineers, design engineers, research and development (RND)
Prior knowledge: Fundamentals of strength and machine elements

Main Topics

• Fundamentals
• Strength hypotheses
• Nominal stress-based calculation approaches
• Local strength method
• Fatigue in contacts
• Standards and guidelines
• Application

Objectives

Improved understanding of the evaluation of multi-axial stress states and their effect on component strength.