CRACKING AND ENERGY DISSIPATION IN CABBAGES
CRACKING AND ENERGY DISSIPATION IN CABBAGES
复制标题
卷心菜的开裂和能量耗散
DOI：
10.1111/j.1745-4603.1983.tb00337.x
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
D. Schoorl
中科院分区：
文献类型：
--
作者：
J. Holt;D. Schoorl
整个卷心菜经受冲击和准静态压缩，并且观察到主要类型的损伤是通过叶片层破裂。在静态载荷下，卷心菜在开始出现严重开裂之前承受了非常高的压缩载荷，力在4000 - 4500 N之间。在冲击时，在0.25米或更高的跌落高度处发生卷心菜开裂。叶片裂纹总长度与下落过程中的能量耗散之间存在很强的线性关系。卷心菜的抗裂性由裂纹长度-能量耗散响应的斜率和能量轴上的线的截距来描述。三个能量耗散机制在压缩加载的卷心菜;能量弹性存储恢复反弹，能量存储被耗散的裂纹扩展，和能量耗散的叶片运动。能量耗散机制可以从甘蓝整体和叶片组织的结构角度来解释。抗裂性是卷心菜的一个有用特性。它可以用来评估卷心菜品种的质地和卷心菜处理系统的损害。
Whole cabbages were subjected to impact and quasi‐static compression, and it was observed that the main type of damage was cracking through the leaf layers. In static loading the cabbages withstood very high compression loads before major cracking began, with forces between 4000‐4500 N. On impact, cracking of cabbages occurred at drop heights of 0.25 m and greater. There is a very strong linear relationship between total leaf crack length and energy dissipated during the drop. The crack resistance of cabbage is described by both the slope of the crack length‐energy dissipative response and the intercept of the line on the energy axis. Three energy dissipative mechanisms operate during the compression loading of cabbages; energy is stored elastically to be recovered in rebound, energy is stored to be dissipated by crack propagation, and energy is dissipated by leaf movement. The energy dissipative mechanisms can be explained in terms of the structure of the whole cabbage and leaf tissue. Crack resistance is a useful property of cabbages. It may be used to evaluate cabbage varieties for texture and cabbage handling systems for damage.