西北工业大学学报
西北工業大學學報
서북공업대학학보
JOURNAL OF NORTHWESTERN POLYTECHNICAL UNIVERSITY
2015年
1期
9-13
,共5页
冯蕴雯%曹勇%魏宇宏%薛小锋
馮蘊雯%曹勇%魏宇宏%薛小鋒
풍온문%조용%위우굉%설소봉
层合板%层间应力%复合材料%有限元方法%厚板%接头%轴承套筒
層閤闆%層間應力%複閤材料%有限元方法%厚闆%接頭%軸承套筒
층합판%층간응력%복합재료%유한원방법%후판%접두%축승투통
为研究含孔边防护套筒的厚截面复合材料层合板耳片连接件孔边层间应力分布规律及接头强度,提出了采用层合板子层和界面胶层相结合的有限元建模方法,在验证了建模方法对厚截面层合板应力求解的有效性的基础上,分析了承受轴向载荷的厚层合板耳片连接件孔边三维应力分布及接头失效情况。结果表明:套筒胶层的破坏应力和破坏位置主要集中在孔轴非接触区;当套筒胶层发生断裂时,厚截面层合板并未发生失效,限制了厚板接头耳片整体强度性能的提高。
為研究含孔邊防護套筒的厚截麵複閤材料層閤闆耳片連接件孔邊層間應力分佈規律及接頭彊度,提齣瞭採用層閤闆子層和界麵膠層相結閤的有限元建模方法,在驗證瞭建模方法對厚截麵層閤闆應力求解的有效性的基礎上,分析瞭承受軸嚮載荷的厚層閤闆耳片連接件孔邊三維應力分佈及接頭失效情況。結果錶明:套筒膠層的破壞應力和破壞位置主要集中在孔軸非接觸區;噹套筒膠層髮生斷裂時,厚截麵層閤闆併未髮生失效,限製瞭厚闆接頭耳片整體彊度性能的提高。
위연구함공변방호투통적후절면복합재료층합판이편련접건공변층간응력분포규률급접두강도,제출료채용층합판자층화계면효층상결합적유한원건모방법,재험증료건모방법대후절면층합판응력구해적유효성적기출상,분석료승수축향재하적후층합판이편련접건공변삼유응력분포급접두실효정황。결과표명:투통효층적파배응력화파배위치주요집중재공축비접촉구;당투통효층발생단렬시,후절면층합판병미발생실효,한제료후판접두이편정체강도성능적제고。
A finite element( FE) modeling method with cohesive interface and sublaminates was proposed to study interlaminar stress distribution and strength of thick-section composite materials lug.And numerical calculation was carried out on the thick composite laminates three-point bending problem; effectiveness of modeling method for thick-section composite materials stress calculation was verified, Based on this, a three dimensional(3D) FE model of thick-section composite materials lug is designed;then the 3D stress distribution along the hole edge and failure mode of the lug subjected to axial load are discussed.The results and their analysis show preliminarily that:( 1) the failure stress and damage position are mainly concentrated in the no contact region of the hole-axis; stiffer metal sleeves reduce the interlaminar stress concentrations of hole edge, however, this and higher radial tensile stresses in the region lead to reduced carrying capacity of the sleeves adhesive; ( 2 ) the adhesive of sleeves fails before the thick-section composites lug; this destroyed the integrity of the protective structure and will adversely affect the strength of the thick-section composites lug.