NISA/ENDURE
NISA/ENDURE is a general-purpose and user-friendly solution for analysing the fatigue performance and fracture characteristics of engineering structures and components. It can directly interface with NISA II and other commercially available finite element programs.
Related Resources
Related News
NISA V18 Released with Streamlined and Expanded Pre- & Post-Processing Capabilities
24th Jan 2012
NISA Software Announces the Availability of PreSys R3 for NISA
22nd Nov 2011
New Discussion Forum Launched for NISA Users
21st Mar 2007
Overview
NISA/ENDURE provides various analysis models and allows different types of load and material data descriptions such as those encountered in aerospace, offshore, and automobile structures. Capabilities include the analysis of service conditions, development of spectra for fatigue analysis, prediction of fatigue and crack growth lives.
Loading & Stress Input
- Peak-valley/range-mean matrix type
- Cumulative exceedance curves
- Sequential variable amplitude histories/variable amplitude spectra
- Probabilistic Representation
- Power spectral density (PSD) for random load representation
- Counting Methods available: Peak, level-crossing, range, range-mean and rain-flow
- Manual stress input input during preliminary design
- Direct interface with static and dynamic analysis results of NISA II
- Input of dynamic effects including random vibration
Material Data
- Access to ready-to-use material data files for popular materials
- User-defined material data input
- Low-cycle fatigue properties
- Crack propagation properties
- Work with multi-material combinations for crack initiation problems
Crack Initiation
- Multi-channel and multi-loadcase capabilities
- Complex multiaxial stresses and out-of-phase fatigue simulations
- Stress-Life (S-N) or Strain-Life (e-N) correlation
- Memory effects and nonlinear material response
Crack Propagation
- User-supplied ‘a’ vs. ‘K’ correlation using fracture analysis results
- Built-in crack configurations
- Crack growth models: Paris, Forman, and Collipriest
- Crack closure models: Elber
Fracture
- Single- and/or mixed-mode fracture analysis
- Quarter-point isoparametric elements around crack tip for accuracy
- Stress Intensity Factor (SIF) estimation
- Crack Tip Opening Displacement (CTOD)
- Virtual Crack Extension (VCE)
- Strain Energy Release Rate (SERR) estimation
- J-Integral
- Virtual Crack Closure Integral (VCCI)
- Modified Crack Closure Integral (MCCI)
- Equivalent Domain Integral (EDI)
- Path independent J-Integral under elastic and elasto-plastic conditions (Delta J)
- Nonlinear elastic multi-load step analysis
- Material nonlinear elastic analysis (EPFM)
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