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首页> 外文会议>International Symposium on Plasticity and Impact Mechanics >Finite Element prediction of static burst pressure in closed thick-walled unflawed cylinders of different diameter ratios
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Finite Element prediction of static burst pressure in closed thick-walled unflawed cylinders of different diameter ratios

机译：不同直径比闭合厚壁无斑圆柱静态爆破压力的有限元预测

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A study has been carried out to predict the static burst pressure in closed thick-walled unflawed cylinders using finite element analysis (FEA). The failure of the cylinder purely by ductile fracture mode is considered in the analysis. Thick-walled cylinders of different diameter ratios (K=outer diameter/inner diameter, ranging from 1.5 to 6) have been investigated. The commercially available ANSYS FEA code has been used, for carrying out an implicit elasto-plastic analysis of the cylinders considering the geometric and material nonlinearities. The Arc-length algorithm available in ANSYS code has been employed to overcome the solution convergence problem, due to tangent singularity at limit state. The FEA predicted static burst pressure for thick-walled cylinders over the considered range of diameters ratios i.e., K=1.5 to 6, showed good agreement with Svensson burst model. The implication of using elastic-perfectly plastic model for the prediction of static burst pressure has also been investigated.
机译：已经进行了一种研究，以预测使用有限元分析（FEA）预测闭合厚壁无斑圆柱体中的静态突发压力。在分析中考虑了纯粹通过延展性裂缝模式的汽缸的失效。已经研究了不同直径比的厚壁圆柱（K =外径/内径，范围为1.5至6）。已经使用市售的ANSYS FEA码，用于考虑几何和材料非线性的气缸的隐式弹塑性分析。由于处于限制状态的切线奇异性，已经采用了ANSYS代码中可用的弧长算法来克服解决方案会聚问题。 FEA在所考虑的直径比范围内预测厚壁圆柱体的静态突发压力I.，K = 1.5至6，与Svensson突发模型显示出良好的一致性。还研究了对使用弹性 - 完美的塑料模型来预测静态突发压力的含义。

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