abaqus帮助文档焊接例子怎么导入

『壹』 在ABAQUS焊接分析DFLUX子程序中FLUX（2）、TIME（2）的两个元素分别代表什么请高手指点

这个我不太清楚，现在在外面没法看帮助文档，不过估计time（2）是时间增量的意思

『贰』 abaqus中如何焊接的方法将两个实体连接起来

看你怎么理解“焊接”了。如果你认为是理想焊接，焊接处位移严格约束，那么就直接回建立coupling就可以了答；如果认为是非理想焊接，焊接处存在刚度，那么abaqus在这方面建模很麻烦，建议你试试hypermesh

『叁』 各位，我毕业设计题目是用ABAQUS对铝钢焊接温度场和应力场数值进行模拟，现在ABAQUS软件不会，各位帮忙啊，

型砂的作用对于铸造业来讲是不言而喻的，举一个简单的例子：经调查研究表明，在铸件的废品总数量中，有接近一半的铸件废品是源自于型砂质量太差、选取不当而导致的。专业人士一般情况下对于型砂的具体标准是：①具有高强度和高的热稳定性，能够承受各种的外力和高温条件，不至于发生太大的变形。②具有好的流动性能，这种流动性体现在型砂在受力的情况下其砂粒彼此之间相互运动的能力。③具有一定程度的可塑性能，这种可塑性能体现在型砂受到外力的影响而发生一定的变形，但是当外力去除后，能够保持所给予形状的能力。④具有良好的透气性能，型砂若是透气性不好，那么就会严重影响到金属液体在型腔内的流动情况以及气体逸散的情况，从而导致铸件废品率的上升。⑤具有好的溃散性能，即铸件凝固成型之后，型砂是否较易破坏，铸件是否容易取出，铸件上附着的型砂是否容易清理。
选取的型砂为树脂自硬砂，由硅砂、树脂和硬化剂等混合配制而成。常用的树脂有呋喃树脂、甲阶酚醛树脂、碱性酚醛树脂及尿烷树脂。用这种型砂制成的砂型强度高、尺寸偏差小、溃散性好、能源消耗少，可用于铸钢、灰口铸铁及铸造有色合金铸件的生产，铸件的表面质量和尺寸精度高。树脂自硬砂是一种有一定发展前景的型砂。它的材料参数如下：

『肆』 abaqus 中怎么将两个部件表示为焊接件

要看你分析什么呢.如果焊缝不是重点考虑对象 大可按照整体模型进行建模

『伍』 hypermesh的装配导入abaqus无效，我在HYPERMESH中划分好网格，添加好焊点等信息并做好连接导入abaqus无效

在hypermesh中定义好连接单元的属性，再导入到abaqus。因为reb2是刚性单元，没有材料特性等属性，所以它可以成功。

『陆』 abaqus中两个焊接面怎么定义接触

1加密从面网格，如果面有尖角不要用smooth2如果从面弹性模量大于主面，把主面覆盖一层更大弹模的膜单元3再加base-node的一对接触4.使用软接触，给个大点的p0值（尽量不用该方法，结果不准）

『柒』 有没有abaqus关于焊接模拟的的书啊请高手推荐

焊接一般在hypermesh里进行处理，然后再导入abaqus中，abaqus中我一般直接用coupling模拟焊接…

『捌』 在ABAQUS上如何查看焊接温度线图

请问用什么设备焊接的？

『玖』 高分求助abaqus焊接模拟方面教程

类似的教程很多，但是绝大多数都是英文。需要你有一定的英文基础。
下面是一个简单的例子，你可以先练习试试看。

1.3.18 Inertia welding simulation using Abaqus/Standard and Abaqus/CAE
Procts: Abaqus/Standard Abaqus/CAE
Objectives
This example demonstrates the following Abaqus features:thermal-mechanical coupling for inertia welding simulation,semi-automatic remeshing using Python scripting and output database scripting methods for extracting deformed configurations,defining a complex friction law in a user subroutine,flywheel loading through user subroutine definitions, andcombining and presenting results from a sequence of output database (.odb) files.
Application description
This example examines the inertia friction welding process of the pipes shown in Figure 1.3.18–1. The specific arrangement considered is the resulting as-welded configuration shown in Figure 1.3.18–2.
In this weld process kinetic energy is converted rapidly to thermal
energy at a frictional interface. The resulting rapid rise in interface
temperature is exploited to proce high-quality welds. In this example
the weld process is simulated, and the initial temperature rise and
material plastic flow are observed. An important factor in the process
design is control of the initial speed of the flywheel so that, when the
flywheel stops, the temperature rises to just below the melting point,
which in turn results in significant flow of material in the region of
the weld joint. Understanding the friction, material properties, and
heat transfer environment are important design aspects in an effective
inertia welding process; therefore, simulation is a helpful tool in the
process design.Geometry
The weld process in this example is shown in Figure 1.3.18–1,
where two pipes are positioned for girth-weld joining. The two pipes
are identical, each with a length of 21.0 mm, an inside radius of
42.0 mm, and an outside radius of 48.0 mm. The pipes are adjacent,
touching each other initially at the intended weld interface.Materials
The pipes are made of Astroloy, a high-strength alloy used in gas turbine components. Figure 1.3.18–3
shows flow stress curves as a function of temperature and plastic
strain rate. At temperatures relevant to the welding process, the
material is highly sensitive to plastic strain rate and temperature.
Specific heat is a function of temperature, as shown in Figure 1.3.18–4.Other material properties are defined as follows:Young's molus:180,000 MPaPoisson's ratio:0.3Density:7.8 × 10–9 Mg/mm3Conctivity:14.7 W/m/C at 20C 28 W/m/C at 1200C
Initial conditions
The pipes are initially set at 20°C, representing room temperature. Boundary conditions and loading
A
pressure of 360 MPa is applied to the top surface of the upper pipe.
The initial rotational velocity of the flywheel is set at 48.17 rad/s,
or 7.7 revolutions per second. The mass moment of inertia of the
flywheel is 102,000 Mg mm2. Interactions
The
principal interaction occurs at the weld interface between the pipes;
however, a secondary concern is the possibility of contact of weld flash
with the side of the pipes. The weld-interface friction behavior is
assumed to follow that described by Moal and Massoni (1995), where the
ratio of shear stress to the prescribed pressure is observed to be a
complex function of interface slip rate. The heat generation from the
frictional sliding, combined with plastic deformation, contributes to
the temperature rise in the pipes.
Abaqus modeling approaches and simulation techniques
Abaqus/CAE
and Abaqus/Standard are used together to affect the weld simulation in a
way that permits extreme deformation of the pipes in the weld region.
This process is automated through the use of Python scripts. Three cases
are studied in this example.Summary of analysis casesCase 1Initial flywheel velocity = 48.17 rad/s. This case proces a successful weld.Case 2Initial
flywheel velocity = 20.0 rad/s. This case illustrates an unsuccessful
weld scenario; the flywheel has insufficient energy to begin the weld
process.Case 3Initial flywheel velocity =
70.0 rad/s. This case illustrates an unsuccessful weld scenario; the
flywheel has excessive energy, resulting in a temperature rise into the
liquis regime of the pipe material.The
following sections discuss analysis considerations that are applicable
to all the cases. Python scripts that generate the model databases and
Abaqus/Standard input files are provided for Case 1, with instructions
in the scripts for executing the Case 2 and Case 3 simulations.Analysis types
The
analysis is nonlinear, quasi-static with thermal-mechanical coupling. A
fully coupled temperature-displacement procere is used.Analysis techniques
The
key feature required for successful simulation of this process is
remeshing. In this example, because of the large deformation near the
weld region, multiple analyses are employed to limit element distortion.
These analyses are executed in sequence, with remeshing performed
between executions, and are automated through the use of Python scripts.
At each remesh point the current model configuration represents a
significant change in the pipes' shape and in the current analysis
mesh. Abaqus/CAE is used to extract the outer surface of the pipes,
reseed the surface, and remesh the pipe regions. This process employs
the Abaqus Scripting Interface PartFromOdb command, which is used to extract orphan mesh parts representing the deformed pipes. These parts are then passed to the Part2DGeomFrom2DMesh command. This command creates a geometric Part
object from the orphan mesh imported earlier. Once the profile of the
deformed part has been created, options in the Mesh mole are used to
remesh the part. The new mesh results in a new Abaqus/Standard analysis,
and the map solution procere maps state variables from the previous
analysis (see “Mesh-to-mesh solution mapping,” Section 12.4.1 of the Abaqus Analysis User's Manual).Mesh design
The
pipes are modeled as axisymmetric. The element formulation used is the
fully coupled temperature-displacement axisymmetric elements with twist
degrees of freedom (element types CGAX4HT and CGAX3HT), where the twist
degree of freedom enables modeling of rotation and shear deformation in
the out-of-plane direction. The hybrid formulation is required to handle
the incompressible nature of the material ring the plastic flow. The
mesh is divided into two regions for each pipe. In the region near the
weld interface, smaller elements are created (see Figure 1.3.18–5).
During the remeshing process, the region near the weld surface is
recalculated so that the new flash region is also meshed with smaller
elements (see Figure 1.3.18–6).Material model
The
material model defined for this example approximates the
high-temperature behavior of Astroloy, where it is reported by Soucail
et al. (1992) using a Norton-Hoff constitutive law to describe the
temperature and strain-rate viscoplastic behavior. A similar model is
defined in Abaqus as a rate-dependent perfectly plastic material model.
For the loading in this model, these material parameters result in the
onset of local plastic flow only after the interface temperature has
exceeded roughly 1200C, near the material solis temperature of
1250C. Above this temperature the Mises flow stress is highly sensitive
to variations in temperature and strain rate. A special adjustment in
the flow stress at high strain rates is necessary to avoid divergence
ring the iteration procere of the nonlinear solution. In the
material model definition an extreme case of stress data is defined when
the strain rate is 1.0 × 106 s–1. Stress data when the strain rate equals zero are also defined to be the same as the stress data at strain rate 1.0 × 10–5 s–1. As a result of large deformation, thermal expansion is not considered in the material model. It
is assumed that 90% of the inelastic deformation energy contributes to
the internal heat generation, which is the Abaqus default for inelastic
heat fraction.Initial conditions