徐绍虎,崔爽.基于本构模型的发泡聚乙烯缓冲特性曲线研究[J].包装工程,2019,40(15):11-15.
XU Shao-hu,CUI Shuang.Expanded Polyethylene Cushion Curve Based on Constitutive Model[J].Packaging Engineering,2019,40(15):11-15. |
| 基于本构模型的发泡聚乙烯缓冲特性曲线研究 |
| Expanded Polyethylene Cushion Curve Based on Constitutive Model |
| 投稿时间：2019-04-28 修订日期：2019-08-10 |
| DOI：10.19554/j.cnki.1001-3563.2019.15.002 |
| 中文关键词: 发泡聚乙烯 本构模型 三次Bezier曲线 缓冲特性曲线 |
| 英文关键词: expanded polyethylene constitutive model cubic Bezier curve cushion characteristic curve |
| 基金项目:重庆工商大学校内科研项目（1552015，1552016） |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 建立EPE本构模型，并基于本构模型研究EPE缓冲系数-最大应力曲线。方法 通过静态压缩实验得到EPE应力-应变曲线，利用三次Bezier曲线拟合实验曲线，根据拟合曲线求得缓冲系数，从而得到缓冲系数-最大应力曲线。结果 利用三次Bezier曲线拟合得到了EPE分段本构模型，基于本构模型建立了EPE分段缓冲系数-最大应力曲线参数方程。本构模型、基于本构模型建立的EPE缓冲系数-最大应力曲线均收敛于分段点（0.3，0.1075），且当拟合应力值为0.4529 MPa时，得到缓冲系数最小值（5.0362）。结论 利用三次Bezier曲线拟合得到的应力-应变曲线与实验曲线有很好的拟合度，分别基于本构模型建立的和由实验数据得到的2条EPE缓冲系数-最大应力曲线有较好的拟合度，基于三次Bezier曲线拟合的本构模型研究EPE缓冲特性曲线是可行的。 |
| 英文摘要: |
| The work aims to establish EPE constitutive model and study EPE buffer coefficient-maximum stress curve according to the model. The EPE stress-strain curve was obtained by static compression test. The cubic Bezier curve was used to fit the experimental curve. According to the fitting curve, the cushioning coefficient was acquired, and then the buffer coefficient-maximum stress curve was obtained. The sectioned EPE constitutive models were obtained through fitting with cubic Bezier curve. Based on the constitutive models, the parametric equations of buffer coefficient-maximum stress curve in EPE sections were established. Both the constitutive models and the EPE buffer coefficient-maximum stress curves based on the constitutive models were converged to the subsection point (0.3, 0.1075). When the stress value fitted was 0.4529 MPa, the minimum value of the buffer coefficient was 5.0362. The stress-strain curve of EPE fitted by the cubic Bezier curve has good fitness with the experimental curve. The two EPE buffer coefficient-maximum stress curves based on the constitutive model and the experimental data have good fitness. It is feasible to study the EPE cushion characteristic curve based on the constitutive model fitted by cubic Bezier curve. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
渝公网安备 50010702501716号