摘要
原纸弹性模量和屈服强度是进行后续各种相关分析必需的性能指标,如何客观准确地测定这2个指标至关重要。在分析已有研究所用测定弹性模量方法存在缺陷的基础上,提出了一种以微分-区限变分法替代传统方法求解原纸弹性模量和屈服强度的方法。并以某定量为105g/m2的瓦楞原纸为例,利用微分-区限变分法计算出该瓦楞原纸的弹性模量为2.51GPa,屈服强度为5.11MPa。微分-区限变分法能客观确定线性段结束的关键点,因而能够更加准确简便地计算原纸的弹性模量和屈服强度。
Young＇ s modulus and yield stress of raw paper are necessary performance indicators as they provide the essential foundation for subsequent analyzing processes of the mechanical behavior of paper, therefore, determination of these two indicators objectively and accurately are critical. Based on the existing defects in measuring Young＇ s modulus in previous studies, differentiation interval variation method was introduced to determine Young＇ s modulus and yield stress of raw paper to substitute traditional methods. Taking the corrugated paper with basic weight of 105 g/m2 for example, differentiation interval variation method was adopted, and the Young＇ s modulus of this paper was calculated as 2.51 GPa, while the yield stress was 5.11 MPa. Differentiation interval variation method could determine the end point of the linear elastic stage in stress-swain curve more objectively, which was the key point of calculating the Young＇s modulus and yield stress of raw paper. By using this method, the Young＇ s modulus and yield stress of raw paper could be obtained with convenience and accuracy.
出处
《包装学报》
2015年第1期40-44,共5页
Packaging Journal
基金
国家自然科学基金资助项目(51303160)
产品包装与物流广东普通高校重点实验室开放基金资助项目(1101712-N)
浙江省高校重中之重学科优秀青年人才培养基金资助项目(2014YXQN04)
关键词
原纸
弹性模量
屈服强度
微分-区限变分法
raw paper
Young＇s modulus
yield stress
differentiation interval variation method
