非線形構造材料モジュール
非線形構造材料モジュール
Expand Structural Analyses with Nonlinear Materials via the Nonlinear Structural Materials Module
ステント設計におけるふくらんだ風船の影響による塑性変形。フォアショートニングとドッグボーニングを調べます。
超弾性、弾塑性、粘塑性、クリープ材料モデルを追加
非線形構造材料モジュールは、構造力学モジュール と MEMS モジュールの機械的機能を、大きな歪み塑性変形機能など非線形材料モデルで強化します。構造の力学応力が大きくなると、材料特性における一定の非線形性により、線形材料モデルは放棄しなければなりません。このような状況は高温など一定の動作条件でも発生します。非線形構造材料モジュールは、弾組成、粘塑性、クリープ、超弾性材料の各モデルを追加します。
応力また不変量または歪み不変量、流動則、クリープ則をベースにしたユーザー定義の材料モデルは、組み込み構成則から初めてユーザーインターフェースで簡単に、直接作成できます。材料モデルの組み合わせと、マルチフィジックス効果の取り込みの両方ができます。このモジュールを加えたチュートリアルモデルは、クリープと可塑性を組み合わせた、熱的に誘発されたクリープと粘塑性および直交異方性の可塑性でこれを紹介しています。非線形構造材料モジュールには、疲労解析モジュールと マルチボディダイナミクスモジュールと組み合わせる重要な用途があります。
事例紹介
円形の棒は、一軸性の引張試験により大きく変形します。棒は、中央断面部分が大きくネッキング変形と塑性変形を受けます。
蠕動ポンプにおける流量、圧力場、ミーゼス応力。流体-構造の連成は、ローラーが管の壁を絞ることで発生します。管材料が大きく変形し、接触、超弾性動作が考えられます。このシミュレーションは、Nagi Elabbasi 氏 (Veryst Engineering) のご厚意により提供いただきました。
| 超弾性 | 可塑性と粘塑性 | クリープ |
|---|---|---|
| Arruda-Boyce | Anand | Coble |
| Blatz-Ko | Kinematic Plastic Hardening | Deviatoric |
| Damping | Isotropic Plastic Hardening | Garofalo (Hyperbolic Sine) |
| Gao | Large Strain Plasticity | Nabarro-Herring |
| Gent | Orthotropic Hill Plasticity | Norton |
| Large Strain Plasticity | Perfectly Plastic Hardening | Norton-Bailey |
| Mooney-Rivlin (two, five and nine parameters) | Thermal Expansion | Potential |
| Murnaghan | Tresca Yield Criterion | User-defined Creep |
| Neo-Hookean | User-defined Plasticity | Volumetric |
| Ogden | von Mises Yield Criterion | Weertman |
| St Venant-Kirchhoff | Perzyna | |
| Storakers | Chaboche | |
| Thermal Expansion | Shima-Oyane | |
| User-defined Hyperelastic Material | Gurson | |
| Varga | Gurson-Tvergaard-Needleman | |
| Yeoh | Fleck-Kuhn-McMeeking | |
| FKM-GTN |
非線形構造材料モジュール
機能
- 弾塑性
- 超弾性
- 粘塑性
- クリープ
- 大変形
- 歪みの大きい可塑性
- ユーザー定義のクリープ、超弾性、可塑性
- 応力不変量または歪み不変量と主ストレッチによるユーザー定義のモデリング
- 温度依存材料データなど非線形構造材料のマルチフィジックス
- 疲労解析モジュールと連携可能
- マルチボディダイナミクスモジュールと連携可能
- 直交異方性 Hill 可塑性
Plastic Deformation During the Expansion of a Biomedical Stent
A stent is a wire-mesh tube used to open a coronary artery during angioplasty, a process for the removal or compression of plaque. Their design is of significance for percutaneous transluminal angioplasty with stenting. During this procedure, a stent is deployed into the blood vessel by means of a balloon. The expanded stent acts as a scaffold ...
Viscoplastic Creep in Solder Joints
This example studies viscoplastic creep in solder joints under thermal loading using the Anand viscoplasticity model, which is suitable for large, isotropic, viscoplastic deformations in combination with small elastic deformations. The geometry includes two electronic components (chips) mounted on a circuit board by means of several solder ball ...
Inflation of a Spherical Rubber Balloon
This model aims to investigate the inflation of a rubber balloon with different hyperelastic material models, and compare the results to analytical expressions. A controlled inflation could benefit clinical applications, cardiovascular research, and the medical device industry, thus the importance of understanding the hyperelastic behavior ...
Hyperelastic Seal
In this model you study the force-deflection relation of a car door seal made from a soft rubber material. The model uses a hyperelastic material model together with formulations that can account for the large deformations and contact conditions.
Necking of an Elastoplastic Metal Bar
A circular metal bar of elasto-plastic material with nonlinear isotropic hardening behavior is subjected to uniaxial tension. Affected by significant stresses the bar experiences high plasticity. The phenomenon of necking is captured and its growth is accurately simulated. The change in radius is in good agreement with results found other ...
Temperature-Dependent Plasticity in Pressure Vessel
This example demonstrates how to use temperature dependent materials within the Nonlinear Structural Materials Module. A large container holds pressurized hot water. Several pipes are attached to the pressure vessel. Those pipes can rapidly transfer cold water in case of an emergency cooling. The pressure vessel is made of carbon steel with an ...
Elastoacoustic Effect in Rail Steel
The elastoacoustic effect is a change in the speed of elastic waves that propagate in a structure undergoing static elastic deformations. The effect is used in many ultrasonic techniques for nondestructive testing of prestressed states within structures. This example studies the elastoacoustic effect in steels typically used in railroad rails. ...
Snap Hook
This example simulates the insertion of a snap hook in its groove. Fasteners like this are common in the automotive industry, for example, in the control panel of a car. In this case it is important to know the force that must be applied in order to place the hook in the slot and also the force needed to remove it. From a numerical point of view, ...
Stress Analysis of a Pressure Vessel
A pressure vessel is designed to hold liquids or gases at substantially higher or lower pressures than the ambient pressure. A high pressure difference requires a correct design in order to avoid catastrophic failures. The Stress Analysis of a Pressure Vessel app is an example of how you can design a tool for checking a family of components with ...
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