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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

Terms N-R of the glossary can be found below

Click to access terms S-Z of the glossary

# Terms N-R

**Natural Frequency**

**Natural Mode**

**Natural Strain**

**Navier-Stokes Equations**

**Newmark Beta Method**

**Newmark Method**

**Newmark’s Time Stepping Schemes**

**Newton Cotes Formulae**

**Newton-Raphson Method**

**Newton-Raphson Non-Linear Solution**

**Nodal Values**

**Nodes**

**Nominal Strain**

**Non-Associative Plasticity**

**Non-Conforming Elements**

**Non-Holonomic Constraints**

**Non-Linear Analysis**

**Non-Stationary Random**

**Non-Structural Mass**

**Norm**

**Normality Rule**

**Norton-Bailey Law**

**Norton Law**

**Numerical Integration**

**Optimal Points**

**Optimal Sampling Points**

**Orthotropy**

**Over Damped System**

**Overstiff Solutions**

**Parametric Studies**

**Participation Factor**

**Patch Test**

**Penalty Function**

**Penalty Stiffness**

**Perfect Plasticity**

**Periodic Response (Force)**

**Phase Angle**

**Phase Change**

**Pilot Studies**

**Plane Strain**

**Plane Stress**

**Plastic Strain**

**Plastic Zones**

**Plate Bending Elements**

**Ply Lay-Up**

**Poissons Ratio**

**Post Analysis Checks**

**Post Yield Fracture Mechanics (PYFM)**

**Post-Processing**

**Potential Energy**

**Potential Energy Release Rate**

**Potential Flow**

**Power Method**

**Prandtl Number**

**Prandtl-Reuss Equations**

**Prandtl-Reuss Flow Rule**

**Predictor-Corrector Schemes**

**P-Refinement**

**Primary Component**

**Primary Creep**

**Principal Curvature**

**Principal Planes**

**Principal Stresses**

**Profile**

**Proportional Damping**

**Proportional Loading**

**Qr Method**

**Radiation**

**Radiation Damping**

**Ramberg-Osgood Power Law**

**Random Vibration Analysis**

**Rank Deficiency**

**Ratchetting**

**Rayleigh Damping**

**Raylelgh Quotient**

**Reaction Forces**

**Receptance**

**Reduced Integration**

**Redundant Structure**

**Residual Forces**

**Resonant Frequency**

**Resonant Response**

**Response Spectrum Method**

**Restarts Checkpoints**

**Reynolds Number**

**Rigid Body Displacement**

**Rigid Body Modes**

**Rigid Links**

**Rigid Offsets**

**Roundoff Error**

**Row Vector**

**Rupture Time**

**Natural Frequency**

**Natural Mode**

**Natural Strain**

**Navier-Stokes Equations**

**Newmark Beta Method**

**Newmark Method**

**Newmark’s Time Stepping Schemes**

**Newton Cotes Formulae**

**Newton-Raphson Method**

**Newton-Raphson Non-Linear Solution**

**Nodal Values**

**Nodes**

**Nominal Strain**

**Non-Associative Plasticity**

**Non-Conforming Elements**

**Non-Holonomic Constraints**

**Non-Linear Analysis**

**Non-Stationary Random**

**Non-Structural Mass**

**Norm**

**Normality Rule**

**Norton-Bailey Law**

**Norton Law**

**Numerical Integration**

**Optimal Points**

**Optimal Sampling Points**

**Orthotropy**

**Over Damped System**

**Overstiff Solutions**

**Parametric Studies**

**Participation Factor**

**Patch Test**

**Penalty Function**

**Penalty Stiffness**

**Perfect Plasticity**

**Periodic Response (Force)**

**Phase Angle**

**Phase Change**

**Pilot Studies**

**Plane Strain**

**Plane Stress**

**Plastic Strain**

**Plastic Zones**

**Plate Bending Elements**

**Ply Lay-Up**

**Poissons Ratio**

**Post Analysis Checks**

**Post Yield Fracture Mechanics (PYFM)**

**Post-Processing**

**Potential Energy**

**Potential Energy Release Rate**

**Potential Flow**

**Power Method**

**Prandtl Number**

**Prandtl-Reuss Equations**

**Prandtl-Reuss Flow Rule**

**Predictor-Corrector Schemes**

**P-Refinement**

**Primary Component**

**Primary Creep**

**Principal Curvature**

**Principal Planes**

**Principal Stresses**

**Profile**

**Proportional Damping**

**Proportional Loading**

**Qr Method**

**Radiation**

**Radiation Damping**

**Ramberg-Osgood Power Law**

**Random Vibration Analysis**

**Rank Deficiency**

**Ratchetting**

**Rayleigh Damping**

**Raylelgh Quotient**

**Reaction Forces**

**Receptance**

**Reduced Integration**

**Redundant Structure**

**Residual Forces**

**Resonant Frequency**

**Resonant Response**

**Response Spectrum Method**

**Restarts Checkpoints**

**Reynolds Number**

**Rigid Body Displacement**

**Rigid Body Modes**

**Rigid Links**

**Rigid Offsets**

**Roundoff Error**

**Row Vector**

**Rupture Time**