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LS-DYNA Composite Vehicle Structure Impact Simulation

30 Chapters
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01
Introduction to LS-DYNA for composite vehicle impact simulation
explicit dynamics workflow, keyword input structure, and typical automotive crashworthiness applications.
LS-DYNAcomposite
02
Composite material fundamentals for crash simulation
fiber and matrix properties, orthotropic elasticity, laminate theory, and failure mechanisms under impact loading.
Compositematerial
03
LS-DYNA composite material models overview
MAT_054/055, MAT_058, MAT_161/162, MAT_261, and selection criteria for vehicle structural components.
LS-DYNAcomposite
04
Building a composite ply definition in LS-DYNA
integration points, ply thickness, fiber orientation, and mapping to shell and solid element formulations.
Buildingcomposite
05
Shell element formulations for composite impact
ELFORM 1, 2, 16, 20, hourglass control, and warping effects in thin-walled automotive structures.
formulationscomposite
06
Solid and thick-shell elements for composite crash simulation
ELFORM -1, -2, and 1 for solid elements, and applicability to thick composite sections.
thick-shellelements
07
Contact definitions for composite vehicle impact
AUTOMATIC_SINGLE_SURFACE, AUTOMATIC_SURFACE_TO_SURFACE, tiebreak contacts, and cohesive zone modeling.
definitionscomposite
08
Intralaminar damage modeling in LS-DYNA
Hashin, Chang-Chang, Puck, and continuum damage mechanics approaches for ply failure.
Intralaminarmodeling
09
Interlaminar damage and delamination simulation
cohesive elements, MAT_138, contact tiebreak, and VCCT for composite vehicle structures.
Interlaminardelamination
10
Strain-rate effects on composite materials
dynamic increase factors, rate-dependent material models, and calibration for automotive crash speeds.
Strain-ratecomposite
11
Modeling of composite energy absorbers
crash tubes, crush triggers, and progressive folding in LS-DYNA with MAT_054/055.
Modelingcomposite
12
Simulation of composite bumper beams and front-end structures
layup design, impact conditions, and correlation with physical tests.
Simulationcomposite
13
Composite B-pillar and side impact simulation
ply drop-offs, adhesive joints, and failure prediction under lateral loading.
CompositeB-pillar
14
Battery enclosure and underbody protection
composite sandwich structures, low-velocity impact, and LS-DYNA modeling strategies.
enclosureunderbody
15
Mesh generation and quality for composite vehicle structures
shell meshing, solid meshing, ply stacking, and mesh convergence studies.
generationcomposite
16
Boundary conditions and loading for impact simulation
rigid wall, impactor, initial velocity, and prescribed motion in LS-DYNA.
Boundaryconditions
17
Solution controls for explicit composite impact
time step, mass scaling, termination, and energy balance checks.
Solutioncontrols
18
Post-processing composite impact results
LS-PrePost, d3plot, intfor, and extraction of ply-by-ply failure and energy absorption.
Post-processingcomposite
19
Validation and verification of composite impact models
mesh sensitivity, material parameter calibration, and comparison with drop tower tests.
Validationverification
20
Modeling of joints and fasteners in composite vehicle structures
adhesive bonding, bolted joints, and rivets in LS-DYNA.
Modelingfasteners
21
Impact simulation of composite hood and roof panels
low-velocity impact, pedestrian protection, and damage tolerance.
simulationcomposite
22
Crashworthiness of composite monocoques
Formula SAE and motorsport applications, torsional stiffness, and impact attenuation.
Crashworthinesscomposite
23
Simulation of composite structures under multiple impacts
residual strength, damage accumulation, and restart analysis in LS-DYNA.
Simulationcomposite
24
Optimization of composite layups for crash performance
DOE, metamodeling, and LS-OPT integration with LS-DYNA.
Optimizationcomposite
25
Fluid-structure interaction for composite vehicle water impact
ALE, SPH, and coupled Euler-Lagrange methods.
Fluid-structureinteraction
26
Thermal effects in composite impact simulation
temperature-dependent properties, MAT_106, and coupled thermal-structural analysis.
compositesimulation
27
Modeling of manufacturing defects in composite crash simulation
voids, fiber waviness, and delamination initial imperfections.
Modelingmanufacturing
28
High-performance computing for large composite vehicle models
domain decomposition, MPP, and GPU acceleration in LS-DYNA.
High-performancecomputing
29
Case study
full vehicle frontal impact with composite front structure: model setup, simulation, and correlation with physical test.
compositestructure
30
Case study
side pole impact of a composite-intensive electric vehicle: battery protection, occupant safety, and design iterations.
composite-intensiveelectric