Nonlinear Optimization of Vehicle Safety Structures : Modeling of Structures Subjected to Large Deformations.

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Detalles Bibliográficos
Clasificación:Libro Electrónico
Autor principal: Christensen, Jesper
Otros Autores: Bastien, Christophe
Formato: Electrónico eBook
Idioma:Inglés
Publicado: Saint Louis, MO : Elsevier Science, 2015.
Temas:
Automobiles > Safety appliances.
Automobiles > Sécurité > Dispositifs.
Automobiles > Safety appliances
Acceso en línea:Texto completo
Tabla de Contenidos:
  • Cover; Title Page; Copyright Page; Table of Contents; Preface; Chapter | one
  • Vehicle Architectures, Structures, and Safety Requirements; 1.1
  • Introduction; 1.2
  • Legislative requirements; 1.3
  • Occupant injuries; 1.3.1
  • The crash test dummy families (or the tools to capture injury criteria); 1.3.2
  • Typical injury criteria; 1.3.2.1
  • Head injury criteria (HIC); 1.3.2.2
  • Head injury criteria for free motion head form (HIC(d)); 1.3.2.3
  • Neck injury criteria (Nij); 1.3.2.4
  • TI (Tibia index); 1.3.3
  • Surrogate impactors; 1.3.4
  • Human computer models.
  • 1.4
  • Typical vehicle architectures and scope for optimization1.4.1
  • Ladder frame; 1.4.2
  • Tubular structures; 1.4.3
  • Integral structures; 1.4.4
  • Shape and size; 1.4.5
  • Materials and manufacture; 1.5
  • Holistic approach to vehicle design; 1.5.1
  • Overall architecture design for structural instruction limitation; 1.5.2
  • Local shape and sizing for legal and other desirable structural requirements; 1.6
  • Conclusions and opportunities; References; Chapter | two
  • Numerical Techniques for Structural Assessment of Vehicle Architectures; 2.1
  • Introduction to finite element analysis (FEA).
  • 2.2
  • Theory of elasticity2.3
  • Elements; 2.3.1
  • One-dimensional elements; 2.3.2
  • Two-dimensional elements; 2.3.3
  • Three-dimensional elements; 2.3.4
  • Zero-dimensional elements; 2.3.5
  • Meshing strategy; 2.3.6
  • Element type; 2.3.7
  • Element shape; 2.3.8
  • Element size; 2.4
  • Fundamental explicit and implicit finite element analysis; 2.5
  • Nonlinear explicit finite element analysis; 2.5.1
  • Understanding the need for explicit FEA in connection with vehicle safety assessment; 2.6
  • Explicit FEA applied to vehicle safety assessment.
  • 2.6.1
  • Standard explicit equations and convergence criteria2.6.2
  • Stress wave propagation and timestep; 2.6.3
  • Relating the timestep to explicit FEA for vehicle safety assessment; 2.6.4
  • Critical element length; 2.6.5
  • Summation of factors influencing the timestep magnitude; 2.6.6
  • Importance of consistent mesh size; 2.6.7
  • Manipulating timestep magnitude; 2.7
  • Contacts; 2.7.1
  • Panel-to-panel contacts; 2.7.2
  • Tied contacts; 2.8
  • Example convergence study of explicit FEA; 2.8.1
  • Contact forces; 2.8.2
  • Kinetic energy; 2.8.3
  • Internal energy; 2.8.4
  • Total energy.
  • 2.8.5
  • Summation of convergence studyReferences; Chapter | three
  • Introduction to General Optimization Principles and Methods; 3.1
  • What is structural optimization?; 3.2
  • How are optimization problems generally solved?; 3.3
  • General optimization methods and principles; 3.4
  • The curse of dimensionality; 3.5
  • Convex programming and optimization; 3.5.1
  • Linear programming; 3.5.2
  • The Simplex method; 3.5.3
  • Application to real-world engineering problems; 3.5.4
  • Sequential linear programming; 3.6
  • Gradient-based methods and line search methods; 3.6.1
  • Gradient descent method.
  • 3.6.2
  • MatLab example of gradient descent method.

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