失效分析与预防
失效分析與預防
실효분석여예방
FAILURE ANALYSIS AND PREVENTION
2014年
2期
94-99,120
,共7页
机翼肋板%ABAQUS%二次开发%裂纹扩展%应力强度因子
機翼肋闆%ABAQUS%二次開髮%裂紋擴展%應力彊度因子
궤익륵판%ABAQUS%이차개발%렬문확전%응력강도인자
wing ribs%ABAQUS%secondary development%crack propagation%stress intensity factor
采用Python语言对ABAQUS进行二次开发，实现了对无人机机翼肋板裂纹扩展的模拟。试验将机翼肋板简化为二维平板结构，在肋板与梁的连接处放置裂纹，模拟不同初始角度的裂纹的扩展过程。结果表明：裂纹的扩展形态、扩展过程中的应力强度因子和裂纹扩展角的变化规律，与裂纹的初始角度有密切的关系；可分为两种情况：当裂纹初始角度为50o~70o时，裂纹沿着初始方向向前扩展，不发生方向的改变；当裂纹初始角度为-70o~40o时，裂纹最终向着翼肋的下表面扩展。该结果对研究机翼肋板裂纹的止裂以及裂纹扩展速率等有一定的参考价值。
採用Python語言對ABAQUS進行二次開髮，實現瞭對無人機機翼肋闆裂紋擴展的模擬。試驗將機翼肋闆簡化為二維平闆結構，在肋闆與樑的連接處放置裂紋，模擬不同初始角度的裂紋的擴展過程。結果錶明：裂紋的擴展形態、擴展過程中的應力彊度因子和裂紋擴展角的變化規律，與裂紋的初始角度有密切的關繫；可分為兩種情況：噹裂紋初始角度為50o~70o時，裂紋沿著初始方嚮嚮前擴展，不髮生方嚮的改變；噹裂紋初始角度為-70o~40o時，裂紋最終嚮著翼肋的下錶麵擴展。該結果對研究機翼肋闆裂紋的止裂以及裂紋擴展速率等有一定的參攷價值。
채용Python어언대ABAQUS진행이차개발，실현료대무인궤궤익륵판렬문확전적모의。시험장궤익륵판간화위이유평판결구，재륵판여량적련접처방치렬문，모의불동초시각도적렬문적확전과정。결과표명：렬문적확전형태、확전과정중적응력강도인자화렬문확전각적변화규률，여렬문적초시각도유밀절적관계；가분위량충정황：당렬문초시각도위50o~70o시，렬문연착초시방향향전확전，불발생방향적개변；당렬문초시각도위-70o~40o시，렬문최종향착익륵적하표면확전。해결과대연구궤익륵판렬문적지렬이급렬문확전속솔등유일정적삼고개치。
Crack propagation of UAV wing's ribs has been simulated by ABAQUS secondary development using Python language. In the study, the wing rib is reduced to two-dimensional slab structure, the crack is placed at the connection of the beam and rib, and the crack propagation process of different initial angle is simulated. The results have been obtained, that crack propagation morphology, variation of stress intensity factor in the expansion process and crack propagation angle, has close relationship with the crack location and initial crack angle. Crack propagation morphology can be divided into two kinds generally, one is along the initial direction when the initial crack angle between 50oand 70o, another is crack towards the lower surface of rib ultimately when the initial crack angle between -70o and 40o. The results have a certain reference value on crack growth rate and crack arrest of the wing ribs.
