ANSYS分析简单钎焊问题

Question

试件尺寸300mm长18mm宽4mm厚，钎料厚度0.3mm, 将两铜片用钎料焊接在一起，一端固定另一端受100N均布力时变形。用ansys软件分析，给出ansys软件交互式操作及命令流

Answer 1

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为了解决提出的钎焊连接问题并使用ANSYS进行分析，我们首先需要建立模型，定义材料属性，施加边界条件，并运行求解。以下是详细的步骤和ANSYS命令流示例。

步骤 1: 创建几何模型

由于ANSYS APDL（参数设计语言）不支持直接绘图，我们将通过命令流创建模型。以下命令用于创建两个铜片和中间的钎料层：

/PREP7
! 定义单元类型和实常数
ET,1,SOLID185 ! 三维实体单元
R,1,0.3      ! 钎料层厚度
R,2,4        ! 铜片厚度

! 创建第一个铜片
K,1,0,0,0   ! 创建点1
K,2,300,0,0 ! 创建点2
K,3,300,18,0 ! 创建点3
K,4,0,18,0  ! 创建点4
AL,K1,K2,K3,K4 ! 创建面
ESIZE,30    ! 设置网格大小
AMESH,ALL   ! 网格划分

! 创建钎料层
K,5,0,0,4   ! 创建点5
K,6,300,0,4 ! 创建点6
K,7,300,18,4 ! 创建点7
K,8,0,18,4  ! 创建点8
AL,K4,K5,K8,K1 ! 创建面
AL,K2,K3,K7,K6 ! 创建面
AL,K5,K6,K7,K8 ! 创建面
ESIZE,30    ! 设置网格大小
AMESH,ALL   ! 网格划分

! 创建第二个铜片
K,9,0,0,8   ! 创建点9
K,10,300,0,8 ! 创建点10
K,11,300,18,8 ! 创建点11
K,12,0,18,8  ! 创建点12
AL,K8,K9,K12,K5 ! 创建面
AL,K6,K7,K11,K10 ! 创建面
AL,K9,K10,K11,K12 ! 创建面
ESIZE,30    ! 设置网格大小
AMESH,ALL   ! 网格划分

步骤 2: 定义材料属性

对于铜和钎料，我们需要定义各自的材料属性。以下命令用于定义材料：

! 定义铜的材料属性 (假设弹性模量为117GPa，泊松比为0.3)
MPDATA,MATERIAL,1,EX,117000
MPDATA,MATERIAL,1,PRXY,0.3

! 定义钎料的材料属性 (使用Anand方程)
MPDATA,MATERIAL,2,EX,1.62e11
MPDATA,MATERIAL,2,PRXY,0.3
MPDATA,MATERIAL,2,THERM,1,1,0.0038
MPDATA,MATERIAL,2,THERM,2,1,0.0038
MPDATA,MATERIAL,2,THERM,3,1,0.0038
MPDATA,MATERIAL,2,THERM,4,1,0.0038
MPDATA,MATERIAL,2,THERM,5,1,0.0038
MPDATA,MATERIAL,2,THERM,6,1,0.0038
MPDATA,MATERIAL,2,THERM,7,1,0.0038
MPDATA,MATERIAL,2,THERM,8,1,0.0038
MPDATA,MATERIAL,2,THERM,9,1,0.0038
MPDATA,MATERIAL,2,THERM,10,1,0.0038
MPDATA,MATERIAL,2,THERM,11,1,0.0038
MPDATA,MATERIAL,2,THERM,12,1,0.0038
MPDATA,MATERIAL,2,THERM,13,1,0.0038
MPDATA,MATERIAL,2,THERM,14,1,0.0038
MPDATA,MATERIAL,2,THERM,15,1,0.0038
MPDATA,MATERIAL,2,THERM,16,1,0.0038
MPDATA,MATERIAL,2,THERM,17,1,0.0038
MPDATA,MATERIAL,2,THERM,18,1,0.0038
MPDATA,MATERIAL,2,THERM,19,1,0.0038
MPDATA,MATERIAL,2,THERM,20,1,0.0038
MPDATA,MATERIAL,2,THERM,21,1,0.0038
MPDATA,MATERIAL,2,THERM,22,1,0.0038
MPDATA,MATERIAL,2,THERM,23,1,0.0038
MPDATA,MATERIAL,2,THERM,24,1,0.0038
MPDATA,MATERIAL,2,THERM,25,1,0.0038
MPDATA,MATERIAL,2,THERM,26,1,0.0038
MPDATA,MATERIAL,2,THERM,27,1,0.0038
MPDATA,MATERIAL,2,THERM,28,1,0.0038
MPDATA,MATERIAL,2,THERM,29,1,0.0038
MPDATA,MATERIAL,2,THERM,30,1,0.0038
MPDATA,MATERIAL,2,THERM,31,1,0.0038
MPDATA,MATERIAL,2,THERM,32,1,0.0038
MPDATA,MATERIAL,2,THERM,33,1,0.0038
MPDATA,MATERIAL,2,THERM,34,1,0.0038
MPDATA,MATERIAL,2,THERM,35,1,0.0038
MPDATA,MATERIAL,2,THERM,36,1,0.0038
MPDATA,MATERIAL,2,THERM,37,1,0.0038
MPDATA,MATERIAL,2,THERM,38,1,0.0038
MPDATA,MATERIAL,2,THERM,39,1,0.0038
MPDATA,MATERIAL,2,THERM,40,1,0.0038
MPDATA,MATERIAL,2,THERM,41,1,0.0038
MPDATA,MATERIAL,2,THERM,42,1,0.0038
MPDATA,MATERIAL,2,THERM,43,1,0.0038
MPDATA,MATERIAL,2,THERM,44,1,0.0038
MPDATA,MATERIAL,2,THERM,45,1,0.0038
MPDATA,MATERIAL,2,THERM,46,1,0.0038
MPDATA,MATERIAL,2,THERM,47,1,0.0038
MPDATA,MATERIAL,2,THERM,48,1,0.0038
MPDATA,MATERIAL,2,THERM,49,1,0.0038
MPDATA,MATERIAL,2,THERM,50,1,0.0038

步骤 3: 施加边界条件和载荷

固定一端并施加100N的力到另一端：

/FINISH
/SOLU
ANTYPE,STATIC
! 固定一端
D,1,ALL
D,4,ALL
D,8,ALL
! 施加载荷
F,10,FY,-100
F,11,FY,-100
F,12,FY,-100
SOLVE
FINISH

步骤 4: 查看结果

使用/POST1进入后处理模式，然后使用PRNSOL,U,COMP查看位移分量。

以上命令流提供了一个基本框架，但需要根据具体需求调整材料属性和边界条件。特别是，上述Anand方程的热膨胀系数部分是示例性的，应根据实际材料数据进行修改。

请注意，Anand方程的实现可能需要更复杂的用户子程序（如UMAT），这在ANSYS APDL中是一个高级主题，未在此示例中涵盖。如果你需要更详细的指导或遇到具体问题，随时询问。