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首页> 外文期刊>Zeitschrift fur Angewandte Mathematik und Mechanik >Modeling of volumetric damage of multielement clamp-knife-base tribo-fatigue system
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Modeling of volumetric damage of multielement clamp-knife-base tribo-fatigue system

机译:多元夹刀基摩擦疲劳系统体积损伤的建模

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摘要

A multielement clamp-knife-base tribo-fatigue system is considered. This system is the main part of a harvester's cutting instrument. Boundary element approach in indirect statement is used to model boundary conditions for system's elements taking into account contact interaction between them, cutting force applied to the knife and fixings. Stress-strain state of the system is calculated as superposition of solutions for each boundary element to which predetermined surfaces tractions are applied. Damage state of each element of the system is calculated using the model of a solid with dangerous volume. According to this model dangerous volume is a set of elementary volumes in which acting stresses (strains) are greater than the limiting stress (strain). Obtained results show that the choice of material of the knife (steel or high strength cast iron) and the value of cutting force has significant effect on system's stress-strain state and state of damage.
机译:考虑了多元素夹刀基摩擦疲劳系统。 该系统是收割机的切割仪器的主要部分。 间接语句中的边界元方法用于模拟系统元素的边界条件,考虑到它们之间的联系人相互作用,施加到刀具和固定的切割力。 系统的应力 - 应变状态计算为施加预定表面牵引的每个边界元件的溶液的叠加。 使用具有危险体积的固体模型计算系统的每个元素的损坏状态。 根据该模型,危险体积是一组基本体积,其中作用应力(菌株)大于限制应力(应变)。 得到的结果表明,刀具的材料(钢或高强度铸铁)和切割力的价值对系统的应力 - 应变状态和损伤状态具有显着影响。

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