CAJ | 학술논문

以木薯茎秆力学试验为基础,应用计算机仿真手段模拟分析了木薯茎秆在失效极限状态下的力学状况. 使用万能试验机对木薯茎秆的主要力学成分(木质部、韧皮纤维)进行拉压试验,分别测定了木质部和韧皮纤维的多组弹性模量数据. 研究表明:①韧皮纤维处的 XY 方向切应力在-0 .002 195 ~-0 .000 231 Pa 范围内,木质部处XY方向切应力在-0.000 231 ~0.000 014Pa范围内,XY 方向最大切应力位于木质部与韧皮纤维交接处为-0.002 195Pa,XY方向最小切应力位于木质部为0.000 14Pa;YZ 方向与 XZ 方向切应力呈现对称性,茎秆在YZ、XZ方向的切应力主要集中在-3.07E-10~-4.58E-11Pa范围内,YZ或XZ方向最大切应力-2.42E-9Pa,YZ或XZ方向最小切应力4 .5 9 E-1 1 Pa. ②模型横向受压时的XY、YZ、XZ方向切应力值分布呈现各自不同的规律,但都对称分布;XY方向切应力最大值为±1.746 49Pa,最小值为±0.194 054Pa;YZ方向切应力最大值为±0.456 2Pa,最小值为±0.005 063Pa;XZ方向切应力最大值为±0.260 701Pa,最小值为±0.028 967Pa.
이목서경간역학시험위기출,응용계산궤방진수단모의분석료목서경간재실효겁한상태하적역학상황. 사용만능시험궤대목서경간적주요역학성분(목질부、인피섬유)진행랍압시험,분별측정료목질부화인피섬유적다조탄성모량수거. 연구표명:①인피섬유처적 XY 방향절응력재-0 .002 195 ~-0 .000 231 Pa 범위내,목질부처XY방향절응력재-0.000 231 ~0.000 014Pa범위내,XY 방향최대절응력위우목질부여인피섬유교접처위-0.002 195Pa,XY방향최소절응력위우목질부위0.000 14Pa;YZ 방향여 XZ 방향절응력정현대칭성,경간재YZ、XZ방향적절응력주요집중재-3.07E-10~-4.58E-11Pa범위내,YZ혹XZ방향최대절응력-2.42E-9Pa,YZ혹XZ방향최소절응력4 .5 9 E-1 1 Pa. ②모형횡향수압시적XY、YZ、XZ방향절응력치분포정현각자불동적규률,단도대칭분포;XY방향절응력최대치위±1.746 49Pa,최소치위±0.194 054Pa;YZ방향절응력최대치위±0.456 2Pa,최소치위±0.005 063Pa;XZ방향절응력최대치위±0.260 701Pa,최소치위±0.028 967Pa.
In this paper , on the basis of cassava stalk mechanical test , application of computer simulation to simulate and analyze the mechanics of cassava stalk in the failure limit state .During the dissertation , analysed composite structure of cassava stalk , gave the relationship of various types of material between the flexible matrix and the engineering constants ,and assumed material types of cassava stalk .Result show:( 1 ) The shear stress of the XY direction on phloem fiber is in the range of -0.002 195~-0.000 231Pa,the shear stress of the XY direction on xylem is in the range of -0.000 231~0.000 014Pa, the maximum shear stress of the XY direction is at the junction of the xylem and phloem fiber which value is -0.002 195Pa, the minimum shear stress of the XY direction is on the xylem which value is 0.000 14Pa;shear stress of YZ direction and XZ direction has the symmetry , the shear stress of stalk at direction of YZ and XZ are concentrated on -3.07E-10~-4.58E-11Pa,the maximum shear stress of YZ or XZ direction is -2.42E-9Pa,the minimum shear stress of YZ or XZ direction is 4.59E-11Pa.(2) The shear stress of XY、YZ、XZ direction present their different laws when pressure model on the lateral , but they all distribute symmetrically .The maximum shear stress of the XY direction is ±1.746 49Pa,the minimum shear stress is ±0.194 054Pa;the maximum shear stress of the YZ direction is ±0.456 2Pa, the minimum shear stress is ±0.005 063Pa, the maximum shear stress of the XZ direction is ±0.260 701Pa, the minimum shear stress is ±0.028 967Pa.