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玉米種子力學特性的有限元分析
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    摘要:

    在建立玉米種子幾何模型與有限元計算模型的基礎(chǔ)上，通過有限元分析方法對玉米種子在壓載作用下不同作用部位的應力分布進行了分析，獲得了玉米種子在不同施力部位壓載作用下的微觀力學性質(zhì)，從而為深入研究玉米種子的力學性質(zhì)、損傷機理、優(yōu)化脫粒機械提供理論依據(jù)。經(jīng)模型計算和試驗結(jié)果相比較,得出種子的宏觀破裂位置和破裂方向與模擬結(jié)果相吻合,種子的宏觀破裂是由內(nèi)部裂紋引起。

    Abstract:

    The geometric model and the finite element model with the measured results for corn seed were established. The stress distribution of corn seed was analyzed under different pressing locations and different pressing loads by the finite element method. The microcosmic mechanical properties of corn seed under different pressing locations and different pressing loads were obtained, which could be provided as mechanical parameters for further studying mechanical properties and damage mechanism of corn seed and optimizing threshing machine. It could be concluded that breaking position and breaking direction of corn seed accorded to simulating result and microcosmic crack of corn seed aroused macroscopic breakage after the comparison was made with the model calculation and the experimental results.

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李心平,高連興,馬福麗.玉米種子力學特性的有限元分析[J].農(nóng)業(yè)機械學報,2007,38(10):64-67.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(10):64-67.

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