Fatigue Analysis Services for Safe, Long-Life Equipment Performance

Ideametrics provides advanced Fatigue Analysis Services to predict crack initiation, stress cycling damage, and long-term failure mechanisms in pressure vessels, piping, rotating machinery, and structural components. Using ASME Section VIII, Division 2 rules and advanced FEA, we deliver accurate fatigue life predictions and clear steps to improve safety and reliability.

Why Fatigue Analysis Matters

Cyclic loading, thermal, mechanical, or pressure-induced, gradually weakens materials even when stresses remain below yield limits. Most unexpected failures occur not from overload but from repeated micro-damage that accumulates over years. Our fatigue assessments identify stress ranges, damage accumulation, and critical zones early, helping you prevent shutdowns, avoid catastrophic failures, and extend component life with confidence.

What Our Fatigue Analysis Services Include

ASME VIII-2 Fatigue Screening & Applicability Check

We determine whether fatigue analysis is mandatory using ASME screening criteria, evaluating design cycles, duty cycles, fluctuating loads, thermal transients, and operational stress changes.

Elastic & Elastic–Plastic Stress Analysis

We compute stress ranges under pressure, thermal gradients, mechanical loads, and transients using linear elastic or nonlinear elastic-plastic FEA models to capture true material response under cyclic loading.

ASME Fatigue Curve Application & Adjustments

We apply ASME fatigue curves, adjusting for surface finish, weld quality, size effects, temperature, and environmental factors to determine permissible cycles and safe stress ranges.

Cumulative Fatigue Damage Assessment

Damage is quantified using Miner’s rule to evaluate accumulated damage for different stress cycles, determining whether the component is within safe limits or approaching failure risk.

Weld Fatigue Evaluation & Critical Location Checks

We assess weld toes, attachments, and geometric transitions using structural stress methods, considering residual stresses, weld geometry, PWHT effects, and stress concentration factors.

Advanced Fatigue Methods & Cyclic Deformation Analysis

We perform multiaxial fatigue analysis, shakedown checks, ratcheting evaluation, and cycle-based deformation studies to ensure cyclic loads do not cause progressive plasticity or collapse.

Fatigue Analysis Project Flow

1. Defining Load Cycles & Operating Spectrum

We gather pressure cycles, temperature cycles, start–stop events, flow variations, and mechanical vibrations to build the real fatigue load spectrum.

5. Improvement, Repair & Inspection Strategy

We recommend design modifications, geometry improvements, derating strategies, reinforcement, or re-inspection intervals based on fatigue behavior.

Key Deliverables

01.

ASME VIII-2 Fatigue Analysis Report

Detailed report including screening criteria, FEA stress results, cycle mapping, and fatigue curve evaluation.

02.

FEA Models with Stress Range Outputs

Linear and nonlinear FEA models showing membrane, bending, peak, and structural stress ranges at critical zones.

03.

Cumulative Damage & Remaining Life Charts

Damage plots, Miner’s rule summaries, and estimated cycles-to-failure.

04.

Weld Fatigue & Structural Stress Assessment

Critical evaluation of weld toes, attachments, and high-stress weld details using structural stress methodology.

05.

Fatigue-Driven Repair & Redesign Guidance

Recommendations for geometry changes, reinforcement, PWHT, or operational adjustments to reduce fatigue damage.

06.

Audit-Ready Compliance Documentation

ASME VIII-2 compliant calculation package with assumptions, stress summaries, fatigue curves, and API/EN references.

Why Choose Ideametrics for Fatigue Analysis

Our fatigue evaluations combine ASME VIII-2 rules, fracture mechanics insights, and advanced cyclic FEA to capture true long-term behavior. We analyze real-world duty cycles, not just design cases, to predict when cracks may initiate and how fast they will propagate. With transparent calculation trails, clear documentation, and IntPE support, our fatigue assessments are trusted for shutdown planning, rerating, redesign, and regulatory audits.

ASME VIII-2 Compliant Fatigue Assessments

Our fatigue studies follow ASME VIII-2 using correct screening, curve selection, and cycle evaluation, ensuring every component meets strict code-based fatigue limits.

Accurate Stress-Cycle Simulation Using FEA

We model real operating cycles with detailed FEA to capture membrane, bending, thermal, and transient stresses, giving accurate stress ranges for fatigue life checks.

Weld Fatigue And Structural Stress Evaluation

Critical welds are assessed using structural stress methods, accounting for residual stresses, weld geometry, and local fatigue hotspots often missed in basic analysis.

IntPE-Reviewed Fatigue Reports Available

For audits or global submissions, our fatigue reports can be peer-reviewed and validated by IntPE engineers, ensuring credibility and smooth regulatory approval.