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首页> 外文会议>ASME international pipeline conference >DIRECT STRAIN CALCULATION OF PIPE LINE DENT FROM KNOT MIGRATION USING A KINEMATIC MODEL FREE OF MATERIAL PROPERTIES
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DIRECT STRAIN CALCULATION OF PIPE LINE DENT FROM KNOT MIGRATION USING A KINEMATIC MODEL FREE OF MATERIAL PROPERTIES

机译：从基因模型无材料性能直接应变计算从结迁移的管线凹陷

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With advances in interpolation and noise filtering, a pure strain calculation can be derived using the fundamental definition of the strain tensor and a shell model with only a few assumptions. Deformation data acquired on the inner surface of the pipe is used to calculate the positional knots that define the inner shell sutface from which the displacement vectors of the median plane can be calculated. Using a shell model around the median plane, the strains can be calculated on the inner and outer surfaces based purely on the displacement of the knot positions. To validate this procedure, an FEM is built using a nonlinear stress-strain response for the steel to model its elasto-plastic behavior with associated kinematic hardening behavior. The model uses a second order shell element with plasticity, large deformation, and large strain capabilities.
机译：通过插值和噪声滤波的进展，可以使用菌株张量的基本定义和壳模型的基本定义来导出纯应变计算，只有少数假设。在管道内表面上获取的变形数据用于计算可以计算中间平面的位移矢量的内壳假面条的位置结。在中间平面周围使用壳体模型，可以纯粹基于内表面和外表面在结位置的位移上计算菌株。为了验证该过程，使用钢的非线性应力 - 应变响应构建有限元，以利用相关的运动固化行为来模拟其弹性塑性行为。该模型使用具有可塑性，大变形和大应变能力的二阶壳元素。

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