水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2015年
1期
144-147
,共4页
应力集中系数%焊趾%单侧搭接接头%有限元分析
應力集中繫數%銲趾%單側搭接接頭%有限元分析
응력집중계수%한지%단측탑접접두%유한원분석
stress concentration factor%weld toe%single overlap joint%finite element analysis
在焊接结构中，由于接头几何参数的影响，易在焊趾处形成应力集中现象，进而对结构疲劳寿命产生重要影响。为了研究几何参数对接头焊趾处应力集中系数的影响，以单侧搭接接头横向承载焊缝为研究对象，采用了有限元方法计算了焊趾处的应力集中系数，研究的主要几何参数包括盖板厚度、主板厚度、焊缝接触角以及焊趾过渡圆弧半径等。结果表明，在保持相关几何参数不变的情况下，通过增加盖板厚度、减小焊趾接触角以及增大过渡圆弧半径等措施，可显著降低焊趾处的应力集中系数。
在銲接結構中，由于接頭幾何參數的影響，易在銲趾處形成應力集中現象，進而對結構疲勞壽命產生重要影響。為瞭研究幾何參數對接頭銲趾處應力集中繫數的影響，以單側搭接接頭橫嚮承載銲縫為研究對象，採用瞭有限元方法計算瞭銲趾處的應力集中繫數，研究的主要幾何參數包括蓋闆厚度、主闆厚度、銲縫接觸角以及銲趾過渡圓弧半徑等。結果錶明，在保持相關幾何參數不變的情況下，通過增加蓋闆厚度、減小銲趾接觸角以及增大過渡圓弧半徑等措施，可顯著降低銲趾處的應力集中繫數。
재한접결구중，유우접두궤하삼수적영향，역재한지처형성응력집중현상，진이대결구피로수명산생중요영향。위료연구궤하삼수대접두한지처응력집중계수적영향，이단측탑접접두횡향승재한봉위연구대상，채용료유한원방법계산료한지처적응력집중계수，연구적주요궤하삼수포괄개판후도、주판후도、한봉접촉각이급한지과도원호반경등。결과표명，재보지상관궤하삼수불변적정황하，통과증가개판후도、감소한지접촉각이급증대과도원호반경등조시，가현저강저한지처적응력집중계수。
In welded structures ,the stress concentration at the weld toe is prone to occur under the effect of geometrical parameters of the welded joint ,which has great influence on the fatigue life of the joint .In order to study the influence of the geometrical parameters on the stress concentration factor ,the transverse loading weld of the single overlap joint was studied .The finite element analysis was adopted to calculate the stress concentration factor at weld toe ,and the effects of some geometrical parameters such as thickness of the cover plate and the main plate ,the contact angle and the arc radius of the weld toe were studied .The results indicate that when the value of some parameters are kept certain ,the stress con-centration factor can be reduced evidently by increasing the thickness of the cover plate ,decreasing the contact angle and improving the arc radius of the weld toe .
