摘要
贝叶经“断裂”病害修复效果通常采用抗弯强度作为核心评价指标。然而,基于最小干预的文物保护原则,传统有损的抗弯强度测试在修复效果评价中难以应用,亟需建立一种科学、无损的评价方法,以量化评估贝叶经“断裂”修复后力学性能的恢复情况。本文首次提出“自然弯曲角(θ)”这一无损检测概念,用于表征贝叶材料在自重作用下的抗弯曲能力。通过碱溶液制备不同老化程度的贝叶样品,分别测量其修复前后的θ值与抗弯强度(R)值,并计算二者的增量θ′与R′。实验结果表明,θ′与R′之间存在显著的强正相关关系,表明修复操作能给自然弯曲角与抗弯强带来明确的提升;对于不同老化时间与病害等级的样品,该方法展现出良好的普适性与稳定性,表现为θ的改善规律一致,即各病害等级的θ′-t曲线斜率接近。综合以上实验数据及30叶贝叶经文物的θ值,最终构建了一套包含四个等级的无损评价体系,成功突破了有损检测的伦理与实践限制,为贝叶经文物的科学保护与修复提供了直观、量化且无损的评估工具,对柔性文化遗产材料的力学性能评价具有重要的方法论借鉴意义。
The evaluation of fracture restoration in Palm Leaf Manuscripts traditionally relies on flexural strength as the primary metric.However,conventional destructive bending tests conflict with the conservation principle of minimal intervention,necessitating a scientific non-destructive method to quantify mechanical recovery.This study pioneers the“natural bending angle(θ)”as a nondestructive parameter to evaluate bending resistance.Using alkaline-treated samples with varying aging levels,we measuredθand flexural strength(R)before and after restoration,calculating their increments(θ′and R′).Results revealed a strong positive correlation betweenθ′and R′,confirming consistent enhancement in mechanical properties across differently aged and damaged samples.By integrating experimental data withθvalues from 30 historical specimens,we established a four-level non-destructive evaluation system.This approach overcomes ethical and practical constraints of destructive testing,providing an intuitive,quantifiable and intact tool for manuscript conservation,with broad implications for assessing flexible cultural heritage materials.
作者
王栢涛
吕佳丽
施继龙
王珊
WANG Baitao;LV Jiali;SHI Jilong;WANG Shan(School of Printing and Packing Engineering,Beijing Institute of Graphic Communication,Beijing 102600,China;China Academy of Cultural Heritage,Beijing 100029,China)
出处
《北京印刷学院学报》
2026年第3期15-20,共6页
Journal of Beijing Institute of Graphic Communication
基金
中国文化遗产研究院基本科研业务费专项资金(2026JBKY04)
北京印刷学院学科建设和研究生教育专项(21090525017)研究成果。
关键词
贝叶经
断裂修复
效果评价
自然弯曲角
抗弯强度
Palm Leaf Manuscripts
fracture restoration
effect evaluation
natural bending angle
flexural strength
