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The Aluminum Alloy Adhesive Joint for Auto Industry Mechanical Behavior Simplification and Simulation under Vehicle Collision

Author: WangXueGang
Tutor: ChenJianHong；ZhuLiang
School: Lanzhou University of Technology
Course: Materials Science
Keywords: Bonding Aluminum alloy Composite tensile Single lap joint Butt joints Mechanical analysis Stress state
CLC: TH871
Type: Master's thesis
Year: 2007
Downloads: 154
Quote: 1
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Abstract


With the rapid development of lightweight vehicles , bonded aluminum alloy technology has a wide range of applications in the automotive industry , the aluminum adhesive increasingly become an important research topic . In this paper, the fracture behavior of aluminum alloy bonded joints , the study of the mechanical properties of the bonding process and bonded joints . The bonding process is an important factor of the mechanical properties of bonded joints , determine the the reasonable bonding process has an important significance . Through theoretical analysis and single lap joint mechanics test method , to optimize the bonding process of the aluminum alloy material , such as the surface treatment method, the ratio of the layer thickness and adhesive and a curing agent , etc. , the test results show that the application of the process is prepared stable performance of bonded joints . Car cognitive fracture behavior of aluminum alloy adhesive member also many gaps , especially in vehicle collision situation is more complex . This article to adopt improved Ar.Can test fixture designed mechanical tests ( tensile test compound ) butt joint in different angles , simplified fracture model aluminum alloy bonded joints in vehicle collision ; Drucker-Prager yield criterion bondline joint mechanics analysis, the yield shear stress to the breaking of this process from the joint with the layer material properties (hydrostatic pressure sensitive coefficient ) αp is the relationship ; on this basis to obtain the test docking joint fracture strength hosted at different angles , joint destruction process associated with the stress state and the adhesive layer material properties of the fracture model , simplified vehicle crash in butt joints fracture model . Single lap joints partial structure ( layer ) mechanical analysis layer failure computational model based on Drucker-Prager yield criterion , the model in a finite element results of the single - lap joint well a description of the process of joint destruction ; finite element model of the composite tensile test results using the σm / σo stress Rhodes parameters to describe the destruction process of butt joints bearer of the different angles , and found that the form of joint destruction depends on the adhesive layer in which the state of stress and the adhesive layer performance , failure modes and determine the carrying capacity of the joint , the test results verify the finite element model of the docking connector .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Material testing machine and test equipment > Metal material testing machines and instruments
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