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MSC.Nastran 2003
Linear Static Analysis
User’s Guide

Corporate
MSC.Software Corporation
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Santa Ana, CA 92707 USA
Telephone: (800) 345-2078
Fax: (714) 784-4056
Europe
MSC.Software GmbH
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Telephone: (49) (89) 43 19 87 0
Fax: (49) (89) 43 61 71 6
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Telephone: (81) (03) 6911 1200
Fax: (81) (03) 6911 1201
Worldwide Web
www.mscsoftware.com
Disclaimer
This documentation, as well as the software described in it, is furnished under license and may be used only in accordance
with the terms of such license.
MSC.Software Corporation reserves the right to make changes in specifications and other information contained in this
document without prior notice.
The concepts, methods, and examples presented in this text are for illustrative and educational purposes only, and are not
intended to be exhaustive or to apply to any particular engineering problem or design. MSC.Software Corporation
assumes no liability or responsibility to any person or company for direct or indirect damages resulting from the use of
any information contained herein.
User Documentation: Copyright
2004 MSC.Software Corporation. Printed in U.S.A. All Rights Reserved.
This notice shall be marked on any reproduction of this documentation, in whole or in part. Any reproduction or
distribution of this document, in whole or in part, without the prior written consent of MSC.Software Corporation is
prohibited.
The software described herein may contain certain third-party software that is protected by copyright and licensed from
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to their respective owners.

CONTENTS
MSC.Nastran Linear Static Analysis User’s Guide
Preface ■ About This Book, xii
■ List of MSC.Nastran Books, xiii
■ Technical Support, xiv
■ Internet Resources, xvii
■ Permission to Copy and Distribute MSC Documentation, xix
1
Introduction ■ Introduction, 2
■ Scope, 3
■ Using the Finite Element Method, 4
■ A Simple Problem, 11
2
Organization of
MSC.Nastran Files
■ Introduction to Organization of MSC.Nastran Files, 20
■ Overview of the MSC.Nastran Input Files, 21
❑ The NASTRAN Statement, 23
❑ File Management Section, 23
❑ Executive Control Section, 23
❑ Case Control Section, 23
❑ Bulk Data Section, 24
■ Overview of the MSC.Nastran Output Files, 27
■ The Executive Control Section, 32
■ The Case Control Section, 34
■ The Bulk Data Section, 41
3
Grid Points, Scalar
Points, and
Coordinate
Systems
■ Introduction to Degrees of Freedom, 48
■ Grid Points, 49
■ Scalar Points, 51
■ Coordinate Systems, 52
❑ User-Defined Coordinate Systems, 54
MSC.Nastran Linear Static Analy-
sis User’s Guide

❑ CORD1R and CORD2R Bulk Data Entries, 54
❑ CORD1C and CORD2C Bulk Data Entries, 58
❑ CORD1S and CORD2S Bulk Data Entries, 59
❑ The Element and Material Coordinate System, 62
4
MSC.Nastran
Elements
■ Introduction to MSC.Nastran Elements, 66
❑ Scalar Elements, 66
❑ One-Dimensional Elements, 66
❑ Two-Dimensional Elements, 67
❑ Three-Dimensional Elements, 68
■ Scalar Elements, 69
■ One-Dimensional Elements, 73
❑ The CROD Element, 73
❑ The CBAR Element, 77
❑ PBARL -- An Alternate and Convenient Method for Defining Bar Cross
Sections, 87
❑ The CBEAM Element, 103
❑ PBEAML-- An Alternate and Convenient Method for Defining CBEAM
Cross Sections, 113
■ Two-Dimensional Elements, 127
❑ The CQUAD4 and CTRIA3 Elements, 127
❑ The CQUAD8 and CTRIA6 Elements, 139
❑ Shell Element Force, Stress, and Strain Output in the Material Coordinate
System, 140
❑ Input, 141
❑ Output, 141
❑ Guidelines and Limitations, 142
❑ The CQUADR and CTRIAR Elements, 142
❑ The Shear Panel Element (CSHEAR), 143
❑ Two-Dimensional Crack Tip Element (CRAC2D), 145
■ Three-Dimensional Elements, 148
❑ The CHEXA, CPENTA, and CTETRA Elements, 148
❑ The CTRIAX6 Element, 152
❑ Three-Dimensional Crack Tip Element (CRAC3D), 153
■ CBUSH Elements, 156
■ The GENEL Element, 160
■ CWELD Connector Element, 165
❑ Introduction, 165
❑ Connectivity Definition, 165
❑ Property Definition, 168
❑ Finite Element Representation of the Connector, 169
❑ Results Output, 170
❑ Example (CWELD101a-b.DAT), 171
❑ Guidelines and Remarks, 174

5
Material Properties
and Composites
■ Introduction to Material Properties, 178
■ Isotropic Material (MAT1), 179
■ Two-Dimensional Anisotropic Material (MAT2), 181
■ Axisymmetric Solid Orthotropic Material (MAT3), 182
■ Two-Dimensional Orthotropic Material (MAT8), 183
■ Three-Dimensional Anisotropic Material (MAT9), 187
❑ Part 1 -- Develop the Material Matrix, 189
❑ Part 2 -- Verify the Material Matrix, 190
❑ Part 3 - Use the Anisotropic Material in the Actual Structure, 193
■ The PSHELL Entry, 197
■ The Composite Element (PCOMP), 199
■ Equivalent Composite Honeycomb Section, 208
6
Static Loads ■ Introduction to Static Loads, 218
■ Loads on Grid Points and Scalar Points, 219
■ Distributed Loads on Line Elements, 223
■ Distributed Loads on Surfaces, 230
■ Gravity and Centrifugal Force (GRAV, RFORCE), 234
❑ Defining Mass in Your Model, 236
■ Initial Strains (DEFORM), 241
■ Load Combinations, 245
■ Thermal Loads, 249
❑ Using the SUBCOM with Thermal Loads, 249
7
Constraints ■ Introduction to Constraints, 259
■ Single-Point Constraints, 260
■ Automatic Application of Single-Point Constraints (AUTOSPC), 263
■ Enforced Displacements at Grid Points (SPCD, SPC), 267
■ Multipoint Constraints, 271
■ Contact Problem Using Linear Static Analysis, 275
❑ Introduction, 275
❑ Input, 275
❑ Output, 276
❑ Limitations, 276
❑ Examples, 277
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