abaqus子程序UMAT编程代码为什么全是错误

应用程序错误解决方法：

1检查电脑是否存在病毒，请使用百度卫士进行木马查杀。

2系统文件损坏或丢失，盗版系统或Ghost版本系统，很容易出现该问题。建议：使用完整版或正版系统。

3安装的软件与系统或其它软件发生冲突，找到发生冲突的软件，卸载它。如果更新下载补丁不是该软件的错误补丁，也会引起软件异常，解决办法：卸载该软件，重新下载重新安装试试。顺便检查开机启动项，把没必要启动的启动项禁止开机启动。

4如果检查上面的都没问题，可以试试下面的方法。

打开开始菜单→运行→输入cmd→回车，在命令提示符下输入下面命令 for %1 in (%windir%\system32\dll) do regsvr32exe /s %1回车。

完成后，在输入下面

for %i in (%windir%\system32\ocx) do regsvr32exe /s %i 回车。

如果怕输入错误，可以复制这两条指令，然后在命令提示符后击鼠标右键，打“粘贴”，回车，耐心等待，直到屏幕滚动停止为止（重启电脑）。

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。

1318 Inertia welding simulation using Abaqus/Standard and Abaqus/CAE

Products: 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 1318–1 The specific arrangement considered is the resulting as-welded configuration shown in Figure 1318–2

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 produce 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 designGeometry

The weld process in this example is shown in Figure 1318–1,

where two pipes are positioned for girth-weld joining The two pipes

are identical, each with a length of 210 mm, an inside radius of

420 mm, and an outside radius of 480 mm The pipes are adjacent,

touching each other initially at the intended weld interfaceMaterials

The pipes are made of Astroloy, a high-strength alloy used in gas turbine components Figure 1318–3

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 1318–4Other material properties are defined as follows:Young's modulus:180,000 MPaPoisson's ratio:03Density:78 × 10–9 Mg/mm3Conductivity:147 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 4817 rad/s,

or 77 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 exampleSummary of analysis casesCase 1Initial flywheel velocity = 4817 rad/s This case produces a successful weldCase 2Initial

flywheel velocity = 200 rad/s This case illustrates an unsuccessful

weld scenario; the flywheel has insufficient energy to begin the weld

processCase 3Initial flywheel velocity =

700 rad/s This case illustrates an unsuccessful weld scenario; the

flywheel has excessive energy, resulting in a temperature rise into the

liquidus regime of the pipe materialThe

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 simulationsAnalysis types

The

analysis is nonlinear, quasi-static with thermal-mechanical coupling A

fully coupled temperature-displacement procedure is usedAnalysis 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 module are used to

remesh the part The new mesh results in a new Abaqus/Standard analysis,

and the map solution procedure maps state variables from the previous

analysis (see “Mesh-to-mesh solution mapping,” Section 1241 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 during 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 1318–5)

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 1318–6)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 solidus 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

during the iteration procedure of the nonlinear solution In the

material model definition an extreme case of stress data is defined when

the strain rate is 10 × 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 10 × 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 fractionInitial conditions

task copyFileToProject1(type: Copy) {

from('build/intermediates/bundles/debug/')

into("$rootProjectprojectDir/demousingsdk/libs/")

include('classesjar')

rename('classesjar', 'xiaoi_sdkjar')

}

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