【iSolver案例分享55】铝合金支座受力分析
1. 引言
iSolver为一个完全自主的面向工程应用的通用结构有限元软件,对标Nastran、Ansys、Abaqus设计和实现,具备结构有限元常用分析类型和单元、材料、载荷等基础算法组件,精度和Abaqus一致。以铝合金支座受力分析为例,演示iSolver的分析流程,并将iSolver和Abaqus计算结果进行对比。
2. 有限元模型介绍
有限元模型如下图所示:
有限元模型
支座采用C3D8R单元模拟,螺栓采用梁单元模拟,梁单元半径为10mm,铝合金采用理想弹塑性本构,材料属性如下图所示:
材料属性
为简化计算,采用半结构分析,支座底部为固定约束,右侧为对称边界条件:
边界条件
采用梁单元模拟螺栓,螺栓与螺栓孔采用coupling约束。计算了两种工况:工况1为螺栓处施加5Kn压力,支座顶部施加10Kn压力,根据节点数平均分布在各节点处;工况2为螺栓受拉,用于分析螺栓受拉时该处的力-位移曲线。
分析步设置如下:
分析步
本案例将相同模型分别在isolver与Abaqus软件中进行计算并对比。
3. 结果对比
工况1下isolver与Abaqus的Mises应力云图如下所示:
工况1 isolver(左)和Abaqus(右)Mises应力云图
工况1下isolver与Abaqus的位移云图如下所示:
工况1 isolver(左)和Abaqus(右)位移云图
工况1下isolver与Abaqus的等效塑性应变云图如下所示:
工况1 isolver(左)和Abaqus(右)等效塑性应变
工况2下isolver与Abaqus的Mises应力云图如下所示:
工况2 isolver(左)和Abaqus(右)Mises应力云图
工况2下isolver与Abaqus的位移云图如下所示:
工况2 isolver(左)和Abaqus(右)位移云图
工况2下isolver与Abaqus的等效塑性应变云图如下所示:
工况2 isolver(左)和Abaqus(右)等效塑性应变
工况2螺栓处拉伸得到的力-位移曲线如下:
力-位移曲线
最大反力均为16.381Kn。
结论:基于isolver软件对铝合金支座进行了受力分析,对比了其在受压及受拉工况下与Abaqus软件的计算结果。结果显示:应力、位移及等效塑性应变均表现出良好的同一性,模拟螺栓的梁单元处力-位移曲线一致。
4. iSolver免费下载
iSolver为免费软件,且无license限制,最新版免费下载地址如下:
https://www.jishulink.com/content/post/337351
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