文章摘要

文章信息/Info

Title:: Research on mechanical properties of infusion bag under drop impact load

作者:: 赵昶旭1; 2; 杜震霆1; 2; 蒋文涛1; 2△; 李忠友1; 2; 谭鸿波3; 刘文军3; 1.四川大学建筑与环境学院力学科学与工程系，成都 610065;2.破坏力学与工程防灾减灾四川省重点实验室，成都 610065;3.四川科伦药业股份有限公司，成都 610500

Author(s):: ZHAO Changxu1; 2; DU Zhenting1; 2; JIANG Wentao1; 2; LI Zhongyou1; 2; TAN Hongbo3; LIU Wenjun3; 1.Department of Mechanical Science and Engineering, Sichuan University, Chengdu 610065, China;2. Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province, Chengdu 610065;3.Sichuan Kelun Pharmaceutical Co.Ltd, Chengdu 610500

Keywords:: Infusion bag; Drop impact load; Coupled Eulerian Lagrangian; Fluid cavity; Split; ABAQUS

摘要:: 输液袋作为静脉给药的重要工具，在运输、储存中主要以跌落破坏形式损耗。本研究采用耦合欧拉-拉格朗日法处理关于输液袋的流体变形和结构材料耦合问题，并采用ABAQUS中的流体腔功能进行充液模拟，提取充液后输液袋的几何模型和预应力场，建立了输液袋的有限元模型。分别讨论跌落高度与袋内充液量的改变对袋体产生的力学影响，从而获得跌落冲击过程中的最大应力及其出现位置。另外，利用高速摄像机获得实际跌落冲击瞬时袋体的变形特点，以验证数值仿真结果。仿真发现输液袋跌落冲击过程中的最大应力出现在袋体长边中点处，实验发现袋体在跌落冲击载荷下，随时间推移袋内液体由中心向边缘转移，且形变幅度减小，与仿真结果相符。结果表明，输液袋在跌落冲击过程中最易在长边中部破裂，在设计生产中应重点关注。

Abstract:: As an important tool for venous transfusion, infusion bags are mainly damaged in form of drop damage during transportation and storage. We used Coupled Eulerian Lagrangian （CEL）to deal with fluid deformation in infusion bag and coupling of structural materials. Fluid cavity function in ABAQUS was used to simulate the filling of infusion bag. Geometric model and pre-stress field of infusion bag after filling were extracted to establish the finite element numerical model of infusion bag .The influence of drop height and the amount of liquid in infusion bag were discussed respectively to obtain the maximum stress value and position. In addition, high-speed camera was used to obtain the deformation characteristics of bag body at the moment of actual dropped impact, so as to verify the results of numerical simulation. Simulation results showed that the maximum stress value of the infusion bag during the dropped impact process occured at the midpoint of the long side, and experiment showed under the drop impact load, the liquid in the bag transfered from the center to the edge over time, and the deformation amplitude decreased, which accorded with simulation results. Results show that infusion bag is most likely to split in the middle of long side in the process of drop impact, which should be paid attention to in design and production.