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Structural mechanics
Structural mechanics

Assessing the Fatigue Life of Plastics

Conventional dimensioning and local concept via FEM

Overview

Training Expert

In this training, you will learn how to assess and apply various concepts for fatigue and creep fracture loads on plastic. Components. This training is offered as a 2-day course.

Duration
2 days

Prerequisites
None

Software used
Ansys Mechanical

Benefits
  • Understand the world of plastics and their damage mechanisms
  • Learn about the influencing factors on fatigue behavior
  • Get an overview of design concepts
  • Conventional dimensioning and local concept via FEM

Description

Nowadays, plastics are replacing other materials such as ceramics or metals in many areas, but what are the long-term aging characteristics of plastic components? The life cycle of plastics depends on a variety of influencing factors such as heat, mechanical stress, and media, and is also greatly affected by the operating and environmental conditions of the plastic product.

In this training, you will learn how to assess and apply various concepts for fatigue and creep fracture loads on plastic. components.

You will learn the key factors that affect the service life of short fiber-reinforced and unreinforced plastics. You will understand service life assessment concepts under fatigue and creep fracture stress. You will become familiar with the application of local stress concepts to plastic components under fatigue and creep fracture stress.

This training addresses computational engineers, reliability design and product testing engineers, designers and research engineers, and anyone who wants to know more about the service life of plastics.

Detailed agenda for this 2-day training

Day 1

01 Introduction to the world of plastics

  • Properties of plastics
  • Reliability design
  • Fatigue of plastics (reinforced, not reinforced)

02 Influencing factors on fatigue behavior

  • Notches
  • Temperature
  • Load ratio/mean stress
  • Fiber orientation, multi-axiality
  • Flow lines

03 Damage mechanisms and overview of dimensioning concepts

  • Overview
  • Experimental investigation methods
  • Typical damage mechanisms
  • Overview of design concepts

04 Conventional dimensioning

  • Strain based concept
  • Derivation of allowable strain/stresses
  • Derivation of material parameters for structural analysis
  • Stress-based concepts
  • Example: tubular component subjected to internal pressure loads
  • Application example conventional dimensioning: calculation of allowable strain for load cases: Bursting pressure, static long-term internal pressure, pulsating internal pressure

Day 2

05 Local stress concepts – isotropic

  • Supporting effect
  • Temperature influence
  • Mean stress sensitivity
  • Failure criteria
  • Sample local stress concept application: creating the calibration curve for the support effect using the sample component for pulsating internal pressure

06 Variable loads

  • Load collectives
  • Damage accumulation rules
  • Cycle counting method
  • Critical damage summary
  • Dealing with scatter
  • Application example load spectrum: Calculation of the amount of damage on the example component

07 Local stress concepts – anisotropic

  • Local fiber orientation
  • Simulation chain for reinforced plastics
  • Sample anisotropy application: creating the calibration curve for considering the anisotropy on the fatigue strength and application at the sample component

08 Special cases

  • Creep rupture load
  • Thermomechanical fatigue
  • Vibration load
  • Crack formation and crack growth
  • Sources for material properties

Your Trainers

Dr. Matthias De Monte
Research Engineer

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Do you have questions on the training?

When will I receive the final confirmation for my training booking?

Straight after you sign up, an automatic confirmation of receipt will be sent to the email addresses you provided. Once you have successfully verified the data you provided, you will receive your personalized sign-up confirmation, containing further information on course fees, the billing address, etc., by email within two to three working days.  

As soon as the minimum number of attendees has been reached, you will receive a final training confirmation containing further information. If you have booked an on-site training, we recommend that you wait until you have received this final confirmation before booking your travel and accommodation.

If the minimum number of attendees is not reached, we reserve the right to cancel the training seven days before it is due to start at the latest. We are happy to inform you on changing your booking to an alternative date. Please note that we accept no liability for hotel or travel bookings that attendees have already made.

When is the sign-up deadline for a training?

Training places will generally be allocated based on the order in which attendees sign up. For this reason, we always recommend booking for your desired date as early as possible.

As long as a coures still has free places, it can be booked.

At what time do the training courses begin and end?

Usually the training courses start at 9:00 am and end at 5:00 pm of the respective local time. The actual course times will be stated in the booking confirmation. Please note that, depending on the training host, there may be a possible time shift between your and the provider's local time. Therefore all local times are provided with the valid time shift to Greenwich Mean Time (GMT). 

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