• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>the International Conference on Numerical Methods in Industrial Forming Processes >The Use of Elasto-Visco-Plastic Material Model Coupled with Pressure-Volume Thermodynamic Relationship to Simulate the Stretch Blow Molding of Polyethylene Terephthalate
【24h】

The Use of Elasto-Visco-Plastic Material Model Coupled with Pressure-Volume Thermodynamic Relationship to Simulate the Stretch Blow Molding of Polyethylene Terephthalate

机译：使用弹性粘塑料材料模型与压力卷热力学关系相结合，模拟聚对苯二甲酸乙二醇酯的拉伸吹塑模塑

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The use of polyethylene terephthalate (PET) in the stretch blow molding process presents several challenging issues due to various processing parameters and complex behavior of the material, which is both temperature and strain-rate dependent. In this paper, we generalize the G'Sell-Jonas law in 3D to model and simulate the elasto-visco-plastic (EVP) behavior of PET, taking into account strain-hardening and strain-softening. It is observed that the internal pressure (inside the preform) is significantly different from the nominal pressure (imposed in the blowing device upstream) since the internal pressure and the enclosed volume of the preform are fully coupled. In order to accurately simulate this phenomenon, a thermodynamic model was used to characterize the pressure-volume relationship (PVR). The predicted pressure evolution is thus more realistic when imposing only the machine power of the blowing device (air compressor or vacuum pump). Mechanical and temperature equilibrium equations are fully nonlinear and solved separately with implicit schemes on the current deformed configuration, which is updated at each time step. Biaxial characterization tests were used to determine the model parameters in order to simulate the stretch blow molding process using the pressure-volume thermodynamic relationship. To validate this model, thickness predictions for three industrial cases will be presented and compared to experimental measurements.
机译：在拉伸吹塑过程中使用聚对苯二甲酸乙二醇酯（PET）由于各种加工参数和材料的复杂行为而呈现了几个具有挑战性的问题，这既有温度和应变率依赖性。在本文中，我们将G'Sell-Jonas法律概括为模型，并模拟了PET的弹性 - 粘塑料（EVP）行为，考虑到应变硬化和应变软化。观察到，由于预制件的内部压力和封闭体积完全耦合，因此观察到内部压力（预制件内部）与标称压力（施加在吹风装置上游）显着不同。为了准确地模拟这种现象，使用热力学模型来表征压力量关系（PVR）。因此，当仅施加吹风装置（空气压缩机或真空泵）时，预测的压力变化是更现实的。机械和温度平衡方程是完全非线性的并且在每次步骤时更新，在电流变形配置上单独解决。使用双轴表征测试来确定模型参数，以便使用压力体积热力学关系模拟拉伸吹塑过程。为了验证该模型，将呈现三种工业案例的厚度预测，并与实验测量进行比较。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号