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DFMEA-Driven LS-DYNA Load Case Design and Risk Assessment

30 Chapters
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01
DFMEA fundamentals for CAE
structure, failure modes, effects, causes, and detection controls in the context of LS-DYNA load case design.
DFMEACAE
02
LS-DYNA load case taxonomy
implicit vs. explicit, quasi-static, dynamic, impact, crash, and durability load cases and their DFMEA relevance.
LS-DYNAtaxonomy
03
Linking DFMEA to simulation requirements
translating failure modes into load case specifications, boundary conditions, and acceptance criteria.
DFMEAsimulation
04
Risk prioritization with RPN and Action Priority
scoring severity, occurrence, and detection for LS-DYNA load cases and defining mitigation actions.
prioritizationRPN
05
Load case design inputs
CAD geometry, material data, mesh requirements, and their impact on DFMEA failure mode coverage.
CADgeometry
06
Boundary condition and loading definition
constraints, initial conditions, contact definitions, and their role in realistic load case representation.
Boundarycondition
07
Material model selection and validation
elastic, plastic, hyperelastic, viscoelastic, and failure models mapped to DFMEA causes and effects.
Materialselection
08
Mesh convergence and quality checks
element type selection, hourglass control, and mesh sensitivity as DFMEA detection controls.
convergenceselection
09
Contact and impact modeling
penalty vs. kinematic contact, friction, and erosion criteria for crash and impact load cases.
modelingkinematic
10
Quasi-static load case design
implicit solver settings, mass scaling, and convergence checks for stiffness and strength assessments.
Quasi-staticimplicit
11
Dynamic and modal load case design
explicit time integration, time step control, and modal analysis for vibration and resonance risks.
explicitintegration
12
Crashworthiness load cases
frontal, side, rear impact, and occupant safety metrics aligned with DFMEA severity ratings.
Crashworthinessoccupant
13
Durability and fatigue load case design
load spectra, cycle counting, and fatigue life prediction linked to DFMEA occurrence ratings.
Durabilitycounting
14
Drop and shock load cases
drop orientation, impact surface, and acceleration response for packaging and handheld products.
orientationacceleration
15
Thermal-structural coupled load cases
thermal expansion, temperature-dependent material properties, and thermal stress failure modes.
Thermal-structuralexpansion
16
Fluid-structure interaction load cases
ALE, SPH, and FSI coupling for pressure loading and blast/impact scenarios.
Fluid-structureinteraction
17
DFMEA-driven load case matrix
building a traceability matrix from failure modes to load cases, simulations, and validation tests.
DFMEA-drivenbuilding
18
Simulation model verification and validation
mesh independence, comparison with test data, and uncertainty quantification for DFMEA confidence.
Simulationverification
19
Sensitivity and robustness studies
design of experiments, parametric variation, and probabilistic methods to assess occurrence risk.
Sensitivityrobustness
20
Failure criteria and post-processing
stress, strain, energy, and damage metrics for detecting failure modes and assigning detection ratings.
criteriapost-processing
21
DFMEA review and update with simulation results
closing the loop between predicted risks and design changes.
DFMEAsimulation
22
Case study
automotive crash load case design driven by DFMEA for a front-end structure.
automotiveDFMEA
23
Case study
consumer electronics drop test load case design and risk assessment using DFMEA.
consumerelectronics
24
Case study
aerospace component fatigue load case design with DFMEA and LS-DYNA.
aerospacecomponent
25
Case study
medical device impact load case design and DFMEA for regulatory compliance.
DFMEAregulatory
26
Automation and scripting in LS-DYNA for load case generation
parameterized models, batch runs, and result extraction.
Automationscripting
27
Integration of DFMEA with PLM and simulation data management
linking load cases to requirements and change management.
IntegrationDFMEA
28
Common pitfalls in DFMEA-driven load case design
over-constraining, unrealistic material data, and misinterpreting results.
pitfallsDFMEA-driven
29
Best practices for documenting LS-DYNA load cases in DFMEA
assumptions, limitations, and validation evidence.
practicesdocumenting
30
Capstone project
end-to-end DFMEA-driven load case design and risk assessment for a selected engineering system using LS-DYNA.
Capstoneend-to-end