Download NX Nastran 8 Element Library Reference PDF

TitleNX Nastran 8 Element Library Reference
File Size6.7 MB
Total Pages257
Table of Contents
                            Contents
	Proprietary & Restricted Rights Notice
	Contents
	1. Overview of the Element Library
		Overview of NX Nastran Elements
			Element and Property Definition in NX Nastran
				Material Properties
		Summary of Small Strain Elements
	2. 0D Elements
		Overview of 0D (Scalar) Elements
		Spring Elements
			CELASi Formats
			PELAS Entry
				CELAS2 Example
		Damping Elements
		Mass Elements
	3. 1D Elements
		Overview of 1D (Line) Elements
		CBAR Element
			CBAR Characteristics and Limitations
			CBAR Format
			CBAR Element Coordinate System and Orientation
			Defining CBAR End Offsets
			CBAR Force and Moment Conventions
			Using Pin Flags to Remove Selected Connections
			Stress Recovery Points
			CBAR Example
			Using PBAR to Define Bar Element Properties
			Using PBARL to Define Beam Cross Section Properties
		CBEAM Element
			CBEAM Element Format
			CBEAM Coordinate System
			CBEAM Orientation
			Defining CBEAM End Offsets
			Using Pin Flags with CBEAMs
			CBEAM Force and Moment Conventions
			CBEAM Example 1 (Simple Truss)
			CBEAM Example 2 (Tapered Beam)
			PBEAM Format
				Element Properties on the PBEAM Entry
			Using PBEAML
			Using PBCOMP
				Mass Matrix
				Cross Sectional Warping
				Shear Relief
				Example Problem of Channel Section
				Example of Tapered Beam
		CBEND Element
			CBEND Format
			PBEND Format
			CBEND Element Coordinate System
				Flexibility and stress intensification factors
		CONROD Rod Element
			CONROD Format
		CROD Element
			CROD Format
			PROD Format
			CROD Element Coordinate System
			CROD Example
		CTUBE Element
		CVISC Element
	4. 2D Elements
		Introduction to Two-Dimensional Elements
			Comparing Plane Stress and Plane Strain Formulations
		The Shear Panel Element (CSHEAR)
			CSHEAR Element Coordinate System
			CSHEAR Output
		Two-Dimensional Crack Tip Element (CRAC2D)
			CRAC2D and ADUM8 Format
			PRAC2D
		Conical Shell Element (RINGAX)
			Defining the Problem with AXIC
			Defining the Geometry with RINGAX
			Constraints for Conical Shells
			Loading for Conical Shells
			Output for Conical Shells
		Plate and Shell Elements
			PSHELL Format
			CQUAD4 and CTRIA3 Elements
				CQUAD4
				CTRIA3
			The CQUADR and CTRIAR Elements
				CQUADR and CTRIAR Guidelines and Limitations
			The CQUAD8 and CTRIA6 Elements
				CQUAD8 Format
				CQUAD8 and CTRIA6 Element Coordinate System
			Understanding Plate and Shell Element Output
				Hierarchy for Output Type
				Forces and Moments
				Stresses
				Strains
				SGAGE, CUBIC, CORNER, BILIN Strain/Stress Options
				CQUAD4 Example 1
				CQUAD4 Example 2
			Using the OMID Parameter to Output Shell Element Results
			Guidelines and Limitations
			Offsetting Shell Elements
		Plane Stress and Plane Strain Elements
			CPLSTS and CPLSTN Elements
			Understanding Plane Stress and Plane Strain Element Output
				Stresses
				Strains
	5. 3D Elements
		Introduction to 3-Dimensional Elements
		Solid Elements (CTETRA, CPENTA, CPYRAM, CHEXA)
			Defining Properties for Solid Elements
			Solid Element Integration Types
			Available Stress and Strain Output for Solid Elements
			Six-Sided Solid Element (CHEXA)
				CHEXA Format
			Five-Sided Solid Element (CPENTA)
				CPENTA Format
			Five-Sided Solid Element (CPYRAM)
				CPYRAM Format
			Four-Sided Solid Element (CTETRA)
				CTETRA Format
		Three-Dimensional Crack Tip Element (CRAC3D)
		Axisymmetric Solid Elements (CTRAX3, CQUADX4, CTRAX6, CQUADX8, CTRIAX6, CTRIAX, CQUADX)
	6. Special Element Types
		General Element Capability (GENEL)
			GENEL Example: Robotic Arm
		Bushing (CBUSH) Elements
			DMAP Operations
				Direct Frequency Response
				Modal Frequency Response
			CBUSH1D Element
				CBUSH1D Benefits
				CBUSH1D Output
				CBUSH1D Guidelines
				CBUSH1D Limitations
		CWELD Connector Element
			CWELD Connectivity Definition
				Using the Patch-to-Patch Method
				Using the Point-to-Patch Option
				Using the Point-to-Point Method
			Defining the Properties of the CWELD
			Finite Element Representation of the Connector
			CWELD Results Output
			Example (CWELD101a-b.DAT)
			CWELD Guidelines and Remarks
		Gap and Line Contact Elements
		Concentrated Mass Elements (CONM1, CONM2)
		p-Elements
			p-Element Geometry
		Hyperelastic Elements
			Hyperelastic Solid Elements
			Hyperelastic Plane Elements
			Hyperelastic Axisymmetric Elements
		Interface Elements
			Curve Interface Elements
				Guidelines
			Surface Interface Elements
				Implementation
				Output
				Guidelines
				Limitations
	7. R-Type Elements
		Introduction to R-Type Elements
			Overview of Available Element Types
			Typical Applications for R-type Elements
			Understanding R-type Elements and Degrees-of-Freedom
		Rigid Element Processing Options
		The RROD Element
		The RBAR Element
			Option 1 – Model the Transition with MPC Equations
			Option 2 - Model the Transition with RBAR Entries
		The RBE2 Element
			RBE2 Example
		The RBE3 Element
			Changes to Handling of RBE3 Elements
	8. Beam Cross Sections
		Using Supplied Beam and Bar Libraries
			ROD Cross Section
			TUBE Cross Section
			BAR Cross Section
			BOX Cross Section
			I Cross Section
			T Cross Section
			L Cross Section
			CHAN Cross Section
			HAT1 Cross Section
		Adding Your Own Beam Cross Section Library
			BSCON SUBROUTINE
			BSBRPD Subroutine
			MEVBRD and MEVBMD Subroutines
			BRXXPD and BMXXPD Subroutines
			BRTUPD Subroutine
			PBARL Record
			PBAR Record
				BMTUPD Subroutine
			PBEAML Record
			PBEAM Record
				BSGRQ Subroutine
				BSBRT Subroutine
				BSBRID Subroutine
				BSBRGD Subroutine
				BSBRCD Subroutine
				BSMSG Subroutine
				Linking Your Library to NX Nastran
			Example of Building and Linking a Beam Server
                        

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