NATIONAL BIBLIOGRAPHY NUMBER
Number
پ۲۱۸۴۲
LANGUAGE OF THE ITEM
.Language of Text, Soundtrack etc
per
TITLE AND STATEMENT OF RESPONSIBILITY
Title Proper
ﺑﺮرﺳﯽ ﻋﺪدي ﺗﺎﺛﯿﺮ روش ﻓﺮآﯾﻨﺪ ﺗﺪاﺧﻞ ﺑﺮ روي ﻋﻤﺮ ﺧﺴﺘﮕﯽ اﺗﺼﺎﻻت دوﻟﺒﻪی ﺑﺮﺷﯽ صفحه ی آﻟﻮﻣﯿﻨﯿﻤﯽ 2024-T3
First Statement of Responsibility
اﻣﯿﺮ اﺑﺮاﻫﯿﻢزاده
.PUBLICATION, DISTRIBUTION, ETC
Name of Publisher, Distributor, etc.
ﻓﻨـﯽ ﻣﻬﻨﺪﺳﯽ ﻣﮑﺎﻧﯿﮏ
Date of Publication, Distribution, etc.
۱۳۹۸
PHYSICAL DESCRIPTION
Specific Material Designation and Extent of Item
۶۸ص.
Accompanying Material
سی دی
DISSERTATION (THESIS) NOTE
Dissertation or thesis details and type of degree
کارشناسی ارشد
Discipline of degree
ﻣﻬﻨﺪﺳﯽ ﻣﮑﺎﻧﯿﮏ (ﻃﺮاﺣﯽ ﮐﺎرﺑﺮدي)
Date of degree
۱۳۹۸/۰۶/۲۰
SUMMARY OR ABSTRACT
Text of Note
اﺗﺼﺎﻻت ﻣﮑﺎﻧﯿﮑﯽ ﺟﺪاﺷﺪﻧﯽ ﮐﻪ ﺷﺎﻣﻞ ﭘﺮچ ﻫﺎ، ﭘﯿﭻ ﻫﺎ و ﭘﯿﻦ ﻫﺎ ﻣﯽﺷﻮد ﺑﻪ ﺻﻮرت ﮔﺴﺘﺮده در ﺻﻨﺎﯾﻊ ﻣﺨﺘﻠﻒ ﺑﻮﯾﮋه در ﺳﺎزهﻫﺎي ﻓﻀﺎﯾﯽ ﮐﺎرﺑﺮد دارد. ﻣﻌﻤﻮﻻً ﺑﺮاي ﻗﻄﻌﺎت ﻓﻀﺎﯾﯽ ﻋﻤﺮ ﺳﺮوﯾﺲ ﻣﺤﺪودي ﺗﻌﺮﯾﻒ ﻣﯽﺷﻮد ﮐﻪ ﺑﺎﯾﺪ ﭘﺲ از اﺗﻤﺎم، ﻗﻄﻌﺎت ﺗﻌﻮﯾﺾ ﺷﻮﻧﺪ از ﻃﺮف دﯾﮕﺮ ﻫﺰﯾﻨﻪ ﺳﺎﺧﺖ ﻗﻄﻌﺎت ﻣﻮرد اﺳﺘﻔﺎده در اﯾﻦ ﺻﻨﻌﺖ ﻣﻌﻤﻮﻻً ﺑﺴﯿﺎر ﺑﺎﻻ اﺳﺖ و ﺗﻌﻮﯾﺾ ﮐﻞ ﺳﺎزه ﯾﺎ ﯾﮏ ﻣﺠﻤﻮﻋﻪ ﻣﻘﺮون ﺑﻪ ﺻﺮﻓﻪ ﻧﯿﺴﺖ از اﯾﻦ رو اﺳﺘﻔﺎده از اﺗﺼﺎﻻت ﺟﺪا ﺷﺪﻧﯽ از ﺟﻤﻠﻪ اﺗﺼﺎﻻت ﭘﯿﭻ و ﻣﻬﺮه راه ﺣﻞ ﺧﻮﺑﯽ ﺑﺮاي اﯾﻦ ﻣﻨﻈﻮر ﻣﺤﺴﻮب ﻣﯽﺷﻮد. در ﻃﻮل ﭼﻨﺪ دﻫﻪ ﮔﺬﺷﺘﻪ ﻣﻄﺎﻟﻌﺎت ﮔﺴﺘﺮده اي در زﻣﯿﻨﻪ اﺻﻮل ﻃﺮاﺣﯽ و رﻓﺘﺎر اﺗﺼﺎﻻت ﭘﯿﭻ و ﻣﻬﺮه در ﺑﺮاﺑﺮ ﺑﺎرﻫﺎي اﺳﺘﺎﺗﯿﮑﯽ و دﯾﻨﺎﻣﯿﮑﯽ ﺑﻪ ﮐﻤﮏ روشﻫﺎي ﺗﺠﺮﺑﯽ و ﻣﺤﺎﺳﺒﺎﺗﯽ اﻧﺠﺎم ﺷﺪه اﺳﺖ. اﯾﻦ ﺷﺎﺧﻪ از ﻋﻠﻮم ﻣﻬﻨﺪﺳﯽ ﻫﻤﯿﺸﻪ از ﻃﺮف ﻣﻮﺳﺴﺎت ﺗﺤﻘﯿﻘﺎﺗﯽ ﻫﻮا و ﻓﻀﺎ ﻣﻮرد ﺣﻤﺎﯾﺖ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ. ﯾﮑﯽ از ﻧﻘﺎط ﺿﻌﻒ اﺗﺼﺎﻻت ﭘﯿﭽﯽ اﯾﻦ اﺳﺖ ﮐﻪ ﺑﺮاي اﻧﺠﺎم اﯾﻦ ﻧﻮع اﺗﺼﺎل ﺑﺎﯾﺪ در ﻣﺤﻞ اﺗﺼﺎل ﺳﻮراخ اﯾﺠﺎد ﺷﻮد و اﯾﻦ اﻣﺮ ﺑﺎﻋﺚ ﺗﻀﻌﯿﻒ و اﯾﺠﺎد ﺗﻤﺮﮐﺰ ﺗﻨﺶ در ﻣﺤﻞ اﺗﺼﺎل ﻣﯽﺷﻮد. ﺑﻨﺎﺑﺮاﯾﻦ در ﻃﺮاﺣﯽ اﯾﻦ اﺗﺼﺎﻻت ﺑﺎﯾﺪ دﻗﺖ ﮐﺎﻓﯽ اﻋﻤﺎل ﺷﻮد، ﺗﺎ از ﺑﺮوز ﮔﺴﯿﺨﺘﮕﯽ ﺟﻠﻮﮔﯿﺮي ﺷﻮد. روشﻫﺎي ﻣﺘﻔﺎوﺗﯽ ﺑﺮاي ﺗﻘﻮﯾﺖ اﺗﺼﺎﻻت ﻣﮑﺎﻧﯿﮑﯽ ﭘﯿﺸﻨﻬﺎد ﺷﺪه اﺳﺖ ﮐﻪ از آن ﺟﻤﻠﻪ ﻣﯽﺗﻮان ﺑﻪ روش اﻧﺒﺴﺎط ﺳﺮد ، ﻧﯿﺮوي ﭘﯿﺶ ﺑﺎر و ﺗﺪاﺧﻞ اﺷﺎره ﮐﺮد. ﻫﺪف از اﻧﺠﺎم ﭘﮋوﻫﺶ ﺣﺎﺿﺮ ﺑﺮرﺳﯽ رﻓﺘﺎر ﺧﺴﺘﮕﯽ روش ﺗﺪاﺧﻞ در اﺗﺼﺎﻻت دو ﻟﺒﻪ ﺑﺮﺷﯽ ﻣﯽﺑﺎﺷﺪ. ﺑﺮاي ﺑﺪﺳﺖ آوردن ﺗﻨﺶ و ﮐﺮﻧﺶ ﺣﺎﺻﻞ از ﺗﺪﺧﻞ در اﺗﺼﺎﻻت دو ﻟﺒﻪ ﺑﺮﺷﯽ از ﯾﮏ ﻣﺪل اﻟﻤﺎن ﻣﺤﺪود ﺳﻪ ﺑﻌﺪي اﺳﺘﻔﺎده ﺷﺪه و ﺗﻤﺎﻣﯽ ﻣﺮاﺣﻞ ﻣﺮﺑﻮط ﺑﻪ ﻋﻤﻠﯿﺎت ﺗﺪاﺧﻞ و ﺑﺎرﮔﺬاري ﻃﻮﻟﯽ ﺗﻨﺎوﺑﯽ ﺑﺎ اﺳﺘﻔﺎده از ﯾﮏ ﻣﺪل اﻟﻤﺎن ﻣﺤﺪود ﺳﻪ ﺑﻌﺪي در ﻧﺮم‌اﻓﺰار اﻧﺴﯿﺲ ﺷﺒﯿﻪﺳﺎزي ﺷﺪه اﺳﺖ. ﺑﻪ اﯾﻦ ﺗﺮﺗﯿﺐ ﺗﺎﺛﯿﺮ ﺗﺪاﺧﻞ و ﺑﺎرﮔﺬاري ﻃﻮﻟﯽ ﺗﻨﺎوﺑﯽ ﺑﺮ روي ﺗﻮزﯾﻊ ﭘﯿﺶ ﺗﻨﺶ ﭘﺴﻤﺎﻧﺪ و ﺗﻨﺶ اﻃﺮاف ﺳﻮراخ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺘﻪ اﺳﺖ.
Text of Note
Abstract : Mechanical joints which connect overlapping plates are widely used in engineering structures – especially on aircraft and these are frequently at critical locations. Indeed many thousands of such joints are needed whether they use bolts, rivetsor securing pins. The location of each fastener hole is inherently a localized stress concentration and a potential source for fatigue crack initiation and propagation under cyclic loading. The design of the joint is therefore of great importance, because inadequate design may lead to defective structures and an early failure. Therefore, to help avoid fatigue failure in mechanical joints, various techniques exist such as cold expansion of the hole, bolt tightening to achieve friction grip clamping and also the use of interference fits are employed. Although this research is concerned with the effect of interference fitting on improving fatigue life of double shear lap joints it is relevant to firstly consider how the alternative methods achieve resis ance to fatigue and also review how they have been studied. In this paper the effect which the level of interference fit has on improving fatigue life of fastener hole in double shear lap joints was studied numerically using 3-D FEM models for determining pre-stress and strain distributions around a cylindrical hole. To study the effect of the severity of the interference fit level on fatigue life FE simulations were carried out for aluminum alloy 2024-T3 on ‘no interference fitted’ specimen and specimens which interference fitted with different levels.
OTHER VARIANT TITLES
Variant Title
Numerical Investigations Into the Effect of an Interference Fit on The Fatigue Life of Double Shear Lap Joints of AL 2024-T3
PERSONAL NAME - PRIMARY RESPONSIBILITY
Entry Element
اﺑﺮاﻫﯿﻢزاده،
Part of Name Other than Entry Element
اﻣﯿﺮ
Relator Code
تهيه کننده
PERSONAL NAME - SECONDARY RESPONSIBILITY
Entry Element
ﻧﻮﯾﺪ ﭼﺎﺧﺮﻟﻮ،
Entry Element
ﺑﯿﮕﻠﺮي،
Part of Name Other than Entry Element
ﺗﺎج ﺑﺨﺶ
Part of Name Other than Entry Element
ﺣﺴﻦ
Dates
استاد راهنما
Dates
استاد مشاور
CORPORATE BODY NAME - SECONDARY RESPONSIBILITY
Entry Element
تبریز
