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Structural mechanics
Structural mechanics

Strength Assessment with Ansys nCode DesignLife

Prove endurance, never give in to fatigue

Overview

Training Expert

High-end fatigue strength — from preassembled glyphs to mapping of individual concepts This training is offered as a 2-day course.

Duration
2 days

Prerequisites
Basic knowledge of Ansys Mechanical

Software used
Ansys Mechanical

Benefits
  • Ansys nCode DesignLife experience based on common strength concepts
  • High cycle fatigue (HCF): stress concept with long time series
  • Low cycle fatigue (LCF): expansion concept and multi-axis stress
  • Assessing the PSD shaker test in accordance with Raleigh, Steinberg, and Dirlik

Description

In addition to the assessment of static strength, dimensioning components generally involves analysis of strength under cyclic loads as well. In many cases, operational strength is verified experimentally through component tests. Since these tests sometimes involve long test times, in which various load levels must be applied and multiple repetitions must also be carried out for statistical validation, the experimental effort can be considerable. For this reason, using simulation technology to estimate the life cycle has established itself as a practical tool in industrial applications.

You are already familiar with structural-mechanical simulation and stress analyses but would like to be able to carry out reliable stress and fatigue analyses for your components, taking into account a range of load scenarios and combinations. In addition to the application of a range of calculation methods for durable design of mechanical components in Ansys nCode DesignLife, this training will also focus on the handling of long time series and load spectra. This course will demonstrate the application of Ansys nCode DesignLife using common strength concepts and help to refresh your knowledge of fatigue strength. After the training, you will be able to reliably and efficiently handle tasks relating to fatigue strength using Ansys nCode DesignLife.

Detailed agenda for this 2-day training

Day 1

01 High cycle fatigue (HCF): fatigue strength according to stress concept I

  • Why do components under cyclical loads break?
  • Operating concept of Ansys nCode DesignLife
  • nCode materials database and import of own data
  • Strength for cyclical loads: Wöhler diagram
  • Evaluation in Ansys nCode
  • Example: Computing an uniaxial trailer coupling

02 High cycle fatigue (HCF): fatigue strength according to stress concept II

  • Strength impact of moderate stresses
  • Stress of the component: Load time series
  • Example: Also with 3-axis time series in accordance with CARLOS TC

03 Operating loads with long time series

  • Options for accelerating strength analysis
  • Shortening time series with peak valley counting
  • Creating a filter run for 2-stage computation of the task
  • Handling long load time series and large models in Ansys nCode
  • Example: Simulating the operational strength at the generic hub of a wind turbine with a 10-minute signal

04 Total service life based on various partial loads

  • Sequences of different loads
  • Evaluation of multiple events
  • Example: Simulating of the operational strength at the generic hub of a wind turbine with the design service life of 20 years

Day 2

05 Low cycle fatigue (LCF): fatigue strength according to strain concept I

  • Materials law for LCF
  • Approaches for elastic-plastic correction
  • LCF workflow in Ansys nCode DesignLife
  • Example: Simulating a shaft under bending

06 Low cycle fatigue (LCF): fatigue strength according to strain concept II

  • Evaluating plastic strains
  • Limiting the computation to highly stressed regions through components
  • Moderate stress corrections in accordance with Smith Watson Topper and Morrow
  • Evaluating strongly multi-axis stresses
  • Example: Simulating a shaft under torsion and bending

07 Fatigue strength assessment with dynamic structural responses

  • Cyclical operational strength: Simulate when static and when dynamic
  • Evaluating operational strength for harmonic excitation (sinus sweep)
  • Evaluating operational strength for randomly excited vibrations (PSD)
  • Example: Lifecycle simulation for a shaker test with PSD excitation for a satellite component in accordance with Narrow Band, Steinberg, and Dirlik

08 Other topics in Ansys nCode DesignLife

  • Efficient evaluation of transient analyses with modal superposition
  • Thermal loads and creep damage
  • Modification of time series
  • Evaluations of non-linear unit loading conditions
  • Fracture mechanical evaluations in Ansys nCode DesignLife

Your Trainers

Niels Kuhn
CAE Engineer, CADFEM Germany GmbH, Stuttgart

Placement in the CADFEM Learning Pathway

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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.

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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). 

Technical Manager