基于平衡原理的弹性结构可视化内力路径

根据内力路径的定义，推导了一种基于平衡原理、结合有限元法和流线追踪算法确定弹性结构可视化内力路径的算法．利用商用有限元软件Algor13和商用数据处理软件Techplot9．0，把前者得到的结构应力计算结果及对应的有限元网格信息通过数据文件输入后者，确定结构内连续的可视化内力路径．作为例子，用此法得到了悬臂梁的可视化内力路径，并比较了内力路径与主应力轨迹的差异．最后指出，应尽量使弹性结构的内力路径为平行、均匀分布的直线。

Visual Load Paths in Elastic Structures Based on Equilibrium Principle

Based on the definition of load paths, an approach was proposed to determine visual load paths in elastic structures. This approach is based on the equilibrium principle and combines the finite element method and the stream tracing algorithm. In order to get continuous visual load paths, commercial software Algor13 is used to get stress fields and finite element meshes and then import these information to another commercial software Techplot9.0 through data files. As an example, load paths in a cantilever beam were plotted by means of this approach and some differences between load paths and principal stress trajectories were compared.Finally, it was pointed out that ideal load paths in an elastic structure are parallel and well-distributed straight lines.