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# The NAFEMS Glossary

A | B | C | D | E | F | G | H | I | J | K | L | M |

N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Click to access terms A-C of the glossary

Click to access terms D-I of the glossary

Click to access terms J-M of the glossary

Click to access terms N-R of the glossary

Terms S-Z of the glossary can be found below

# Terms S-Z

**Safe Life**

**Sandwich Structure**

**Scalars Vectors**

**Secant Stiffness**

**Second Piola-Kirchhoff Stress**

**Secondary Components**

**Secondary Creep**

**Seepage Flow**

**Seismic Analysis**

**Selected Reduced Integration**

**Self Adjoint Equations**

**Self Equilibrating Loads**

**Semi-Loof Element**

**Shakedown**

**Shape Functions**

**Shape Parameters**

**Shape Sensitivity**

**Shear Locking**

**Simpsons Rule**

**Simultaneous Vector Iteration**

**Single Degree Of Freedom**

**Single Element Tests**

**Single Point Constraint**

**Singular Matrix**

**Skew Distortion (Angular Distortion)**

**Skew Symmetric Matrix**

**Sliding**

**Smeared Crack Model**

**Snap Back (Also Called Snap Through)**

**Softening**

**Solid Elements**

**Solution Accuracy**

**Solution Diagnostics**

**Solution Efficiency**

**Sparse Matrix Methods**

**Spectral Density**

**Spline Curves**

**Spurious Cracks**

**Statically Determinate Structure**

**Statically Equivalent Loads**

**Statically Indeterminate Structure Redundant**

**Stationary Random Excitation**

**Steady State Creep Law**

**Steady State Response**

**Step**

**Step-By-Step Integration**

**Stiffness Matrix**

**Strain Energy**

**Strain Energy Release Rate**

**Strain Hardening Law**

**Strain-Life Approach**

**Stress Averaging Stress Smoothing**

**Stress Concentration**

**Stress Discontinuities Stress Error Estimates**

**Stress Extrapolation**

**Stress Intensity Factor**

**Stress Relaxation**

**Stress Substitution Method**

**Stress Vector Stress Tensor Strain Vector Strain Tensor**

**Stress Waves**

**Stress-Life Approach**

**Stress-Strain Law**

**Structured Grid (Or Mesh)**

**Subspace Vector Iteration**

**Substructure (Also Called Superelement)**

**Substructuring Super Element Method**

**Superposition**

**Supports**

**Surface Element**

**Symmetrical Matrix**

**Symmetry**

**Symmetry (Of Model)**

**Tangent Stiffness**

**Tangent Stiffness Matrix**

**Tertiary Creep**

**Tetrahedron Tetrahedral Element**

**Thermal Capacity**

**Thermal Conductivity**

**Thermal Contact**

**Thermal Loads**

**Thermal Strains**

**Thin Shell Element Thick Shell Element**

**Time Domain**

**Time Hardening Law**

**Time Stepping Schemes**

**Total Lagrangian Formulation**

**Trace Of The Matrix**

**Transfinite Mapping**

**Transformation Method**

**Transient Analysis**

**Transient Force**

**Transient Response**

**Transition Element**

**Tresca Yield Criterion**

**Triangular Elements**

**True Strain (Also Called Logarithmic Strain Or Natural Strain)**

**True Stress (Also Called Cauchy Stress)**

**Turbulence**

**Ultimate Stress**

**Uncertainty Quantification**

**Undamped Natural Frequency**

**Under damped system**

**Unit Matrix**

**Unstructured Grid (Or Mesh)**

**Updated Lagrangian Formulation**

**Upwinding In Fluids**

**Variable Bandwidth (Skyline)**

**Velocity**

**Virtual Crack Extension Method**

**Virtual Displacements**

**Virtual Work Virtual Displacements Virtual Forces**

**Visco-Elasticity**

**Visco-Plasticity**

**Viscous Damping**

**Viscous Damping Matrix**

**Volume Distortion Volumetric Distortion**

**Volumetric Strain**

**Volumetric Stress**

**Von Mises Equivalent Stress Tresca Equivalent Stress**

**Von Mises Stress**

**Von Mises Yield Criterion**

**Wave Propagation**

**Wavefront (Front)**

**Weighted Residuals**

**Whirling Stability**

**White Noise**

**Wilson Theta Method**

**Word Length**

**Yield Criterion**

**Yield Stress**

**Yielding**

**Youngs Modulus**

**Zero Energy Modes**