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MacNeal-Harder Test This is a curved cantilever beam solved with solid and shell elements. A model is made with each element's type to investigate the effect of distorted elements with a high aspect ratio.
NAFEMS Nonlinear Static Analysis
NAFEMS Dynamic Response Analysis
NAFEMS Random Response Analysis
NAFEMS Normal Modes Analysis
NAFEMS Composites
Response Spectrum Analysis
OS-V: 0700 Twisted Cantilever Beam (Implicit Results)
MacNeal-Harder Test This is a twisted cantilever beam solved with solid and shell elements. A model is made with each element's type to investigate the effect of distorted elements with a high aspect ratio.
OS-V: 0710 Curved Cantilever Beam
MacNeal-Harder Test This is a curved cantilever beam solved with solid and shell elements. A model is made with each element's type to investigate the effect of distorted elements with a high aspect ratio.
OS-V: 0720 Straight Cantilever Beam
MacNeal-Harder Test This is a straight cantilever beam solved with solid and shell elements. Three models (rectangular, parallelogram, trapezoidal) are made with each element's type to investigate the effect of distorted elements with a high aspect ratio.
OS-V: 0730 Scordelis-Lo Roof
MacNeal-Harder Test The Scordelis-Lo Roof is a classical benchmark problem for shell elements. Analytical and experimental investigations were initially performed by Scordelis and Lo.
OS-V: 0740 Curved Strip Hook
Raasch Challenge Raasch challenge is a curved strip hook problem with a tip in-plane shear load, posed in 1990 by Ingo Raasch of BMW in Germany. The problem poses a significant challenge to shell elements because of the inherent coupling between three modes of deformation: bending, extension, and twist. OptiStruct is benchmarked against the Raasch challenge to assure its shell elements performance on Linear Static Analysis.
OS-V: 0750 Radial Stretching of a Cylinder
Illustrates the use of asymmetrical elements (CTAXI) under uniform radial displacement in OptiStruct.
OS-V:0760 MacNeal-Harderソリッドパッチテスト
MacNeal-Harderテストこのパッチテストは、要素に関する古典的なベンチマーク問題です。テストに対して正しい結果が生成される場合は、その要素を使用して解析されたすべての問題の結果が正しい解に収束します。提示される問題セットの本来の目的は、さまざまな用途での有限要素の精度を特定することです。
本セクションでは、OptiStructに関してよくある代表的な質問についてお答えしています。
本マニュアルでは、NAFEMSの問題を含めた検証モデルの解を紹介しています。
OS-V: 0710 Curved Cantilever Beam
MacNeal-Harder Test This is a curved cantilever beam solved with solid and shell elements. A model is made with each element's type to investigate the effect of distorted elements with a high aspect ratio.
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OS-V: 0710 Curved Cantilever Beam
MacNeal-Harder Test This is a curved cantilever beam solved with solid and shell elements. A model is made with each element's type to investigate the effect of distorted elements with a high aspect ratio.
図 1. FE Model of the Beam with Boundary Conditions and Loadcases
Benchmark Model
Six types of elements are used for this problem. They are tria-shell, quad-shell, and hexa-solid elements, each with 1st and 2nd order. Two loading cases are used for each model; in-plane bending, transverse bending. For both load cases, unit loads are applied in a consistent fashion over all of the nodes at the tip of the beam.
Theoretical solutions for the deflections at the tip, computed by beam theory are:
In-plane bending
Transverse bending
Linear Static Analysis Results
All results are normalized with the target value.
In-plane Bending
Transverse Bending
Model Files
必要なモデルファイルのダウンロードについては、モデルファイルへのアクセスを参照してください。
The model files used in this problem include:
CBhex20.fem
CBquad4.fem
CBquad8.fem
MacNeal, R.H., and Harder, R.L., A Proposed Standard Set of Problems to Test Finite Element Accuracy, Finite Elements in Analysis and Design, 1 (1985) 3-20.
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