A Bonded Joint Analysis for Surface Mount Components

To gain a better understanding of the stress state in surface mount joints and their design considerations, an analysis method of bonded joints is developed and consequently three parameters that govern the stress distribution are identified. The solutions are obtained in terms of trigonometric and hyperbolic functions, and then applied to a simplified surface mount device. Contrary to general belief that the surface mount joints are mainly subjected to shear, it is shown that a peel stress also exists in a joint. Especially in a short joint used to connect stiff members as in direct mounting of chips and chip carriers, the magnitude of the peel stress is far greater than the shear stress.

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Substrate stress concentrations in bonded lap joints

The Journal of Strain Analysis for Engineering Design ◽

10.1243/0309324981513039 ◽

1998 ◽

Vol 33 (5) ◽

pp. 331-346 ◽

Cited By ~ 19

Author(s):

C H Wang ◽

M Heller ◽

L R F Rose

Keyword(s):

Shear Stress ◽

Stress Concentration ◽

Adhesive Layer ◽

Present Theory ◽

Lap Joints ◽

Stress Concentrations ◽

Adhesively Bonded ◽

Adhesively Bonded Joints ◽

Bonded Joint ◽

Peel Stress

A method based on the successive boundary stress correction approach is presented for the determination of the stress concentration in substrates of adhesively bonded joints with square edges or spew fillets at the ends of the overlap. The emphasis is given to developing an estimate of the stress elevation at the end of a bonded joint while the issue of corner singularity at the substrate-adhesive interface is not addressed in detail. It is shown that the adhesive shear stress which acts on the substrates is the main cause of the stress concentration; the adhesive peel stress has little effect. To circumvent the deficiencies of existing bonded joint theories which generally predict a maximum adhesive shear stress at the ends of the adhesive layer, an eigenfunction solution has been derived for the shear stress distribution near the ends of the overlap. Based on the improved adhesive shear stress solution presented here, the stress concentration determined from the present theory is found to be in good agreement with finite element results.

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Adhesively bonded joints of jute, glass and hybrid jute/glass fibre-reinforced polymer composites for automotive industry

Applied Adhesion Science ◽

10.1186/s40563-020-00131-6 ◽

2021 ◽

Vol 9 (1) ◽

Author(s):

H. F. M. de Queiroz ◽

M. D. Banea ◽

D. K. K. Cavalcanti

Keyword(s):

Automotive Industry ◽

Failure Load ◽

Natural Fibre ◽

Bonded Joints ◽

Adhesively Bonded ◽

Adhesively Bonded Joints ◽

Reinforced Polymer ◽

Fibre Composites ◽

Bonded Joint ◽

Fibre Reinforced Polymer

AbstractNatural fibre-reinforced composites have attracted a great deal of attention by the automotive industry mainly due to their sustainable characteristics and low cost. The use of sustainable composites is expected to continuously increase in this area as the cost and weight of vehicles could be partially reduced by replacing glass fibre composites and aluminium with natural fibre composites. Adhesive bonding is the preferred joining method for composites and is increasingly used in the automotive industry. However, the literature on natural fibre reinforced polymer composite adhesive joints is scarce and needs further investigation. The main objective of this study was to investigate experimentally adhesively bonded joints made of natural, synthetic and interlaminar hybrid fibre-reinforced polymer composites. The effect of the number of the interlaminar synthetic layers required in order to match the bonded joint efficiency of a fully synthetic GFRP bonded joint was studied. It was found that the failure load of the hybrid jute/glass adherend joints increased by increasing the number of external synthetic layers (i.e. the failure load of hybrid 3-layer joint increased by 28.6% compared to hybrid 2-layer joint) and reached the pure synthetic adherends joints efficiency due to the optimum compromise between the adherend material property (i.e. stiffness and strength) and a diminished bondline peel stress state.

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Design of Micro-Gripper With Topology Optimal Compliant Mechanisms

Microelectromechanical Systems ◽

10.1115/imece2004-62274 ◽

2004 ◽

Author(s):

Shyh-Chour Huang ◽

Chien-Ching Chiu

Keyword(s):

Linear Programming ◽

Compliant Mechanisms ◽

Compliant Mechanism ◽

New Method ◽

Sequential Linear Programming ◽

Analysis Method ◽

Electrothermal Actuator ◽

Design Considerations ◽

Micro Gripper

The objective of this paper describes a new method to design a micro-gripper. In the paper, we use compliant mechanism actuated by micro combined V-shape electrothermal actuator to design a microgripper that the claw can clip the micro object. The compliant mechanism employs flexible to generate movement without any hinge; therefore, it is suitable for MEMS manufacture. The design of micro-gripper is accomplished in compliant mechanism with topology optimum and solved by sequential linear programming (SLP) methods. The design considerations, the analysis method, and the design results are discussed.

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Stress Equations for Adhesive in Twodimensional Adhesively Bonded Joints/ Równania Naprężn W Plaskich Dwuwymiarowych Spoinach Klejowych

Civil and Environmental Engineering Reports ◽

10.1515/ceer-2014-0027 ◽

2014 ◽

Vol 14 (3) ◽

pp. 75-94

Author(s):

Piotr Rapp

Keyword(s):

Shear Stress ◽

Shear Stresses ◽

Bonded Joints ◽

Adhesively Bonded ◽

Adhesively Bonded Joints ◽

Adhesive Layers ◽

Axial Forces ◽

Joint Plane ◽

Base Functions ◽

The Subject

Abstract The subject of this paper is formulation of shear stress equations for plane twodimensional adhesive layers present in adhesively bonded joints. The adherends are assumed to have the same thickness and be made of an isotropic material. The shape of the adherends in the joint plane is arbitrary. The adhesive joint can be subjected to a shear stress arbitrarily distributed on the adherends surfaces as well as normal and shear stresses arbitrarily distributed along the adherends edges. A set of two partial differential equations of the second order with shear stresses in the adhesive as unknowns has been formulated. For a particular case of rectangular joints a set of 12 base functions has been derived; their appropriate linear combinations uniquely define shear stresses in the adhesive for a joint loaded arbitrarily by a set of axial forces, bending moments and shear forces.

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Verification, Validation, and Limits of Applicability of a Rapid Bonded Joint Analysis Tool

AIAA Scitech 2020 Forum ◽

10.2514/6.2020-1927 ◽

2020 ◽

Author(s):

Stephen Jones ◽

Bertram Stier ◽

Brett A. Bednarcyk ◽

Evan J. Pineda ◽

Upul R. Palliyaguru

Keyword(s):

Joint Analysis ◽

Analysis Tool ◽

Bonded Joint

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Review of Tailoring Methods for Joints with Additively Manufactured Adherends and Adhesives

Materials ◽

10.3390/ma13183949 ◽

2020 ◽

Vol 13 (18) ◽

pp. 3949

Author(s):

Mattia Frascio ◽

Eduardo André de Sousa Marques ◽

Ricardo João Camilo Carbas ◽

Lucas Filipe Martins da Silva ◽

Margherita Monti ◽

...

Keyword(s):

Additive Manufacturing ◽

Review Paper ◽

State Of The Art ◽

Manufacturing Processes ◽

Bonded Joints ◽

Design For Additive Manufacturing ◽

Polymeric Additive ◽

Current State ◽

Bonded Joint ◽

Current Modelling

This review aims to assess the current modelling and experimental achievements in the design for additive manufacturing of bonded joints, providing a summary of the current state of the art. To limit its scope, the document is focused only on polymeric additive manufacturing processes. As a result, this review paper contains a structured collection of the tailoring methods adopted for additively manufactured adherends and adhesives with the aim of maximizing bonded joint performance. The intent is, setting the state of the art, to produce an overview useful to identify the new opportunities provided by recent progresses in the design for additive manufacturing, additive manufacturing processes and materials’ developments.

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Stress Analysis of Bonded Joint Using Solid Element Combinations

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.467.332 ◽

2013 ◽

Vol 467 ◽

pp. 332-337

Author(s):

Xiao Cong He

Keyword(s):

Finite Element ◽

Mechanical Behaviour ◽

Adhesive Layer ◽

Smooth Transition ◽

Triangular Prism ◽

Suitable Model ◽

Bonded Joints ◽

Adhesively Bonded ◽

Adhesively Bonded Joints ◽

Bonded Joint

This paper describes some finite element combinations to analyse the mechanical behaviour of bonded joints. In finite element models five layers of solid elements were used across the adhesive layer in order to increase the accuracy of the results. The finite elements were refined gradually in steps from adherends to adhesive layer. In these models, most of the adherends and adhesive were modeled using solid brick elements but some solid triangular prism elements were used for a smooth transition. Comparisons are performed between different types of first-order element combinations in order to find a suitable model to predict the mechanical behaviour of adhesively bonded joints.

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Evaluation of ASME Class 3 HDPE Flanged Joints

Volume 6B: Materials and Fabrication ◽

10.1115/pvp2017-65990 ◽

2017 ◽

Author(s):

Thomas M. Musto ◽

Glenn R. Frazee ◽

Michael P. H. Marohl

Keyword(s):

Internal Pressure ◽

Joint Analysis ◽

Special Design ◽

Design Considerations ◽

Piping Systems ◽

Torque Values

In the design of piping systems, there are many options for transitioning between HDPE and metallic piping. One common option is the use of flanged joints. As a result of the visco-elastic nature of HDPE, the use of HDPE-to-metallic flanged joints requires special design considerations. When HDPE-to-metallic flanged joints are used in ASME Class 3 systems, the design is further complicated by the requirements provided in the ASME B&PV Code, Section III for flanged joint analysis. This paper examines the differences between HDPE piping flanged joints and metallic piping flanged joints, including consideration of industry guidance and available industry testing results. The paper provides a proposed methodology for evaluating ASME Class 3 HDPE-to-metallic flanged joints and HDPE-to-HDPE flanged joints, including the determination of required bolt torque values and the determination of the maximum internal pressure that the joint can resist without experiencing leakage.

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