Abaqus单元选择压力接触和网格生成
合集下载
相关主题
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
用实体单元模拟弯曲 • Stress Concentrations 应力集中 • Contact 接触 • Incompressible Materials 不可压缩材料 • Mesh Generation 网格生成 • Solid Element Selection Summary
Elements in ABAQUS
• 自由度数目 Degrees of freedom – The primary variables that exist at the nodes of an element are the degrees of freedom in the finite element analysis. – Examples of degrees of freedom are: • Displacements 位移 • Rotations 转角 • Temperature 温度 • Electrical potential 电势
special-purpose elements like springs,
dashpots, and masses
truss elements
Elements in ABAQUS
• Number of nodes 节点数(interpolation)
– An element’s number of nodes determines how the nodal degrees of freedom will be interpolated over the domain of the element.
– 数值积分的算法影响单元的行为 The numerical algorithm used to integrate these variables influences how an element behaves.
– ABAQUS包括完全积分和减缩积分。 ABAQUS includes elements with both “full” and “reduced” integration.
Elements in ABAQUS
•公式 Formulation
–The mathematical formulation used to describe the behavior of an element is another broad category that is used to classify elements. –Examples of different element formulations:
– ABAQUS includes elements with both first- and secondorder interpolation. 插值函数阶数可以为一 次或者两次
First-order interpolation
Second-order interpolation
Elements in ABAQUS
Elements in ABAQUS
• ABAQUS单元库中提供广泛的单元类型，适应不同的结构和几何特征 The wide range of elements in the ABAQUS element library provides flexibility in modeling different geometries and structures.
– Each element can be characterized by considering the following: 单元特性： • Family 单元类型 • Number of nodes 节点数 • Degrees of freedom 自由度数 • Formulation 公式 • Integration 积分
Elements in ABAQUS
• 积分Integration
– 单元的刚度和质量在单元内的采样点进行数值计算，这些采样点叫做“积分 点” The stiffness and mass of an element are calculated numerically at sampling points called “integration points” within the element.
Elements in ABAQUS
–同种类单元又有很多 变化：There are many variations within a family.
Biblioteka Baidu
continuum (solid elements)
shell elements
beam elements
rigid elements
membrane elements
infinite elements
•Plane strain 平面应变 •Plane stress 平面应力 •Hybrid elements 杂交单元 •Incompatible-mode elements 非协调元 •Small-strain shells 小应变壳元 •Finite-strain shells 有限应变壳元 •Thick shells 后壳 •Thin shells 薄壳
Elements in ABAQUS
•单元类型（Family）
–A family of finite elements is the broadest category used to classify elements.
–同类型单元有很多相 同的基本特。 Elements in the same family share many basic features.
Abaqus单元选择压力接 触和网格生成
2020年7月4日星期六
内容提要
• Elements in ABAQUS • Structural Elements (Shells and Beams) vs. Continuum Elements • Modeling Bending Using Continuum Elements
Elements in ABAQUS
• 自由度数目 Degrees of freedom – The primary variables that exist at the nodes of an element are the degrees of freedom in the finite element analysis. – Examples of degrees of freedom are: • Displacements 位移 • Rotations 转角 • Temperature 温度 • Electrical potential 电势
special-purpose elements like springs,
dashpots, and masses
truss elements
Elements in ABAQUS
• Number of nodes 节点数(interpolation)
– An element’s number of nodes determines how the nodal degrees of freedom will be interpolated over the domain of the element.
– 数值积分的算法影响单元的行为 The numerical algorithm used to integrate these variables influences how an element behaves.
– ABAQUS包括完全积分和减缩积分。 ABAQUS includes elements with both “full” and “reduced” integration.
Elements in ABAQUS
•公式 Formulation
–The mathematical formulation used to describe the behavior of an element is another broad category that is used to classify elements. –Examples of different element formulations:
– ABAQUS includes elements with both first- and secondorder interpolation. 插值函数阶数可以为一 次或者两次
First-order interpolation
Second-order interpolation
Elements in ABAQUS
Elements in ABAQUS
• ABAQUS单元库中提供广泛的单元类型，适应不同的结构和几何特征 The wide range of elements in the ABAQUS element library provides flexibility in modeling different geometries and structures.
– Each element can be characterized by considering the following: 单元特性： • Family 单元类型 • Number of nodes 节点数 • Degrees of freedom 自由度数 • Formulation 公式 • Integration 积分
Elements in ABAQUS
• 积分Integration
– 单元的刚度和质量在单元内的采样点进行数值计算，这些采样点叫做“积分 点” The stiffness and mass of an element are calculated numerically at sampling points called “integration points” within the element.
Elements in ABAQUS
–同种类单元又有很多 变化：There are many variations within a family.
Biblioteka Baidu
continuum (solid elements)
shell elements
beam elements
rigid elements
membrane elements
infinite elements
•Plane strain 平面应变 •Plane stress 平面应力 •Hybrid elements 杂交单元 •Incompatible-mode elements 非协调元 •Small-strain shells 小应变壳元 •Finite-strain shells 有限应变壳元 •Thick shells 后壳 •Thin shells 薄壳
Elements in ABAQUS
•单元类型（Family）
–A family of finite elements is the broadest category used to classify elements.
–同类型单元有很多相 同的基本特。 Elements in the same family share many basic features.
Abaqus单元选择压力接 触和网格生成
2020年7月4日星期六
内容提要
• Elements in ABAQUS • Structural Elements (Shells and Beams) vs. Continuum Elements • Modeling Bending Using Continuum Elements