CAJ | 학술논문

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105 g/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2.51 GPa，屈服强度为5.11 MPa。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。
원지탄성모량화굴복강도시진행후속각충상관분석필수적성능지표，여하객관준학지측정저2개지표지관중요。재분석이유연구소용측정탄성모량방법존재결함적기출상，제출료일충이미분-구한변분법체대전통방법구해원지탄성모량화굴복강도적방법。병이모정량위105 g/m2적와릉원지위례，이용미분-구한변분법계산출해와릉원지적탄성모량위2.51 GPa，굴복강도위5.11 MPa。미분-구한변분법능객관학정선성단결속적관건점，인이능구경가준학간편지계산원지적탄성모량화굴복강도。
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-strain 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.