不同材质纸浆模塑性能测试与仿真分析

发布时间：2018-01-25 04:55

本文关键词： 纸浆模塑扫描电镜边沿结构跌落仿真缓冲包装　出处：《湖南工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：纸浆模塑制品是一种以植物纤维为原料,通过一定成型工艺模压形成的包装制品。纸浆模塑制品具有加工工艺简单、易成型、材料可降解回收等优点,被广泛应用于各个领域。目前,缺乏相应的纸浆模塑制品设计及生产国家标准与行业标准,纸浆模塑生产制造过程中不同生产厂商所生产加工出的纸浆模塑制品材料配比、力学性能等均存在较大差异。本论文以不同材质纸浆模塑为研究对象,对不同材质的纸浆模塑材料性能及制品性能进行了研究。本研究能够为纸浆模塑制品的设计选材,及纸浆模塑制品生产加工过程中纤维配比提供依据。对木浆、竹浆、甘蔗浆、瓦楞原纸、白浆、黑浆、回收旧报纸浆、回收瓦楞纸浆材料进行拉伸实验,获得了不同材质纸浆模塑材料的应力-应变曲线。利用不同配比纸浆模塑材料拉伸应力应变曲线,获取了材料弹性模量值。由于纸浆模塑制品属于纸质薄壁材料,纸质薄壁材料在拉伸过程中横向变形较小,传统测试方法难以满足要求。论文利用数字图像相关法与拉伸实验相结合,获得了不同材质的纸浆模塑材料的泊松比值。利用扫描电镜对木浆、竹浆、甘蔗浆、瓦楞原纸、白浆、黑浆、回收旧报纸浆、回收瓦楞纸浆材料的表面纤维分布及断面纤维状态进行了扫描电镜分析。研究了不同材质纸浆模塑材料的纤维结构特性,以及材料纤维特性对纸浆模塑材料力学特性的影响。对白浆材料纸浆模塑制品进行了静态抗压实验,获得了制品在抗压过程中的载荷-位移曲线。并利用ANSYS软件对木浆、竹浆、甘蔗浆、黑浆、回收旧报纸浆、回收瓦楞纸浆材料的纸浆模塑制品进行静态压缩仿真分析,研究了同一结构不同材料对纸浆模塑制品承载能力的影响。利用ANSYS/LS-DYNA DTM模块对不同边沿结构的纸浆模塑制品进行了跌落仿真分析,研究了边沿结构对纸浆模缓冲性能的影响。以缓冲性能最好的边沿结构的纸浆模塑制品为模型,以不同材料为变量,研究了动态冲击作用下,材质对纸浆模塑制品缓冲性能的影响。
[Abstract]:Pulp molded product is a kind of packaging product which is made of plant fiber and molded by certain molding technology. Pulp molded product has the advantages of simple processing, easy molding, degradable material recovery and so on. It is widely used in various fields. At present, there is no corresponding national standard and industry standard for pulp molded products design and production. In the process of pulp moulding production, the material ratio and mechanical properties of pulp molded products produced by different manufacturers are different. In this paper, pulp molded with different materials is taken as the research object. The properties of pulp molded materials and products of different materials were studied. This study can provide the basis for the design and selection of pulp molded products and the fiber ratio in the process of production and processing of pulp molded products. Bamboo pulp, sugarcane pulp, corrugated base paper, white pulp, black pulp, recovery of old newspaper pulp, recovery of corrugated pulp materials for tensile test. The stress-strain curves of different pulp moulding materials were obtained, and the tensile stress-strain curves of pulp molded materials with different ratios were obtained. The elastic modulus of the material is obtained. Because the pulp molded products belong to paper thin-walled materials, the transverse deformation of paper thin-walled materials is small in the process of drawing. The traditional testing method is difficult to meet the requirements. The paper combines the digital image correlation method with the tensile experiment to obtain the Poisson ratio of molded pulp of different materials. The scanning electron microscope is used to analyze wood pulp, bamboo pulp and sugarcane pulp. Corrugated base paper, white pulp, black pulp, recycled old newspaper pulp. The surface fiber distribution and cross-section fiber state of corrugated pulp were analyzed by SEM. The fiber structure characteristics of pulp molded materials with different materials were studied. And the influence of fiber properties on the mechanical properties of pulp moulding materials. The static compression test of pulp molded products with white pulp was carried out. The load-displacement curves of the products in the process of compressive resistance were obtained, and the wood pulp, bamboo pulp, sugarcane pulp, black pulp and old newspaper pulp were recovered by ANSYS software. The static compression simulation analysis of pulp molded products with corrugated pulp materials was carried out. The effect of different materials of the same structure on the load-carrying capacity of pulp molded products was studied. Using ANSYS/LS-DYNA. The drop simulation analysis of pulp molded products with different edge structures was carried out by DTM module. The influence of edge structure on the cushioning performance of pulp mould was studied. The molded pulp product with the best edge structure was used as model and different materials as variables under dynamic impact. The effect of material on the cushioning performance of pulp molded products.
【学位授予单位】：湖南工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB484

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