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压缩载荷下脆性果品组织的随机损伤演化特征研究
Research on stochastic damage evolution of brittle fruit tissue under uniaxial compression
投稿时间:2023-09-24  修订日期:2023-10-22
DOI:
中文关键词:  苹果组织  机械损伤  损伤模型  压缩载荷
英文关键词:apple tissue  mechanical damage  damage model  compression
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位邮编
张佩佩 天津商业大学 机械工程学院 300134
王怀文* 天津商业大学 机械工程学院 300134
计宏伟 天津商业大学 机械工程学院 300134
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中文摘要:
      脆性果品组织结构的多相性和随机性使得传统的损伤模型不足以描述其力学损伤行为。本文以富士苹果为例,考虑组织内部孔隙微裂纹的扩展,将切应力作为组织破坏的主要因素,通过建立并联剪切微弹簧模型探索苹果组织在压缩载荷下的损伤演化过程。通过单轴压缩实验,计算出与损伤相关的统计参数,并基于此预测压缩应力。结果表明,本研究模型的预测结果与实验结果之间的确定系数为0.95,能够较准确地描述单轴压缩状态下苹果组织的损伤行为。本研究为探索果品组织的力学性质和损伤行为提供了有力工具,对生物力学和食品科学领域有重要意义。
英文摘要:
      The multiphase and stochastic nature of the microstructure of brittle fruit tissue renders traditional damage models inadequate in describing its mechanical behavior. Taking Fuji apples as an example, this study considered the expansion of microcracks in the internal pores of apple tissues, with shear stress as the main factor of tissue damage. The evolution of damage in apple tissue under compressive loads was explored by employing a parallel shear micro-spring model. Statistical parameters associated with damage were computed through uniaxial compression experiments and utilized to predict compressive stress. The results show that the coefficient of determination between the prediction results of the model and the experimental results is 0.95, which can describe the damage behavior of apple tissues under uniaxial compression accurately. This study provides a powerful tool for exploring the mechanical properties and damage behavior of fruit tissues, which is important for the fields of biomechanics and food science.
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