Insertion Force in Snap-Fits Assembly Based on Different Design Parameters: A Simulation Study

2021 ◽  
pp. 991-999
Author(s):  
Syafiq Syahiran Suzamri ◽  
Muhammed Nafis Osman Zahid
Keyword(s):  
Simulation Study ◽  
Design Parameters ◽  
Insertion Force

Generation of Design Data Through Numerical Modeling of a Post and Dome Feature

1999 ◽  
Author(s):  
David A. Nichols ◽  
Anthony F. Luscher
Keyword(s):  
High Performance ◽  
Shear Loading ◽  
Design Parameters ◽  
Insertion Force ◽  
Design Data ◽  
Beam Equations ◽  
Regression Techniques ◽  
Sensitivity Data ◽  
Improved Design ◽  
Main Effects

Abstract This paper focuses on developing improved design equations to estimate the retention strength, insertion force, and insertion strain of a particular snap-fit, the post and dome feature. Finite element methods and multiple regression techniques were used in lieu of beam equations to develop the improved design equations. Sensitivity data is plotted for both the main effects and selected variable interactions. A study of detailed catch geometry was done in order to identify an optimal catch geometry. Typical design parameters were varied in order to develop design equations for users of this feature. The post and dome feature was selected for analysis because it is a high performance snap-fit that is self-datuming and can take some shear loading in addition to retention. The post and dome provide a higher ratio of retention force to insertion force than traditional cantilever snap-fits, and retention is less dependent on friction.

Shape Optimal Design of Contact Springs of Electronic Connectors

2002 ◽  
Vol 124 (3) ◽  
pp. 178-183 ◽  
Author(s):  
Yeh-Liang Hsu ◽  
Yuan-Chan Hsu ◽  
Ming-Sho Hsu
Keyword(s):  
Contact Force ◽  
Printed Circuit Boards ◽  
Normal Force ◽  
Optimization Techniques ◽  
Contact Forces ◽  
Design Parameters ◽  
Original Design ◽  
Insertion Force ◽  
Element Analysis ◽  
Normal Contact

An electronic connector provides a separable interface between two subsystems of an electronic system. The contact spring is probably the most critical component in an electronic connector. Mechanically, the contact spring provides the contact normal force, which establishes the contact interface as the connector is mated. However, connector manufacturers have a basic struggle between the need for high normal contact forces and low insertion forces. Designing connectors with large numbers of pins that are used with today’s integrated circuits and printed circuit boards often results in an associated rise in connector insertion force. It is possible to lower the insertion force of a connector by redesigning the geometry of the contact spring, but this also means a decrease in contact normal force. In this paper, structural shape optimization techniques are used to find the optimal shape of the contact springs of an electronic connector. The process of the insertion of a PCB into the contact springs of a connector is modeled by finite element analysis. The maximum insertion force and the contact normal force are calculated. The effects of several design parameters are discussed. The geometry of the contact springs is then parameterized and optimized. The required insertion force is minimized while the normal contact force and the resulting stress are maintained within specified values. In our example, the insertion force of the final contact spring design is reduced to 68.3% of that of the original design, while the contact force and the maximum stress are maintained within specified values.

Simulation Study on Sewage Discharge Environmental Effect in Tianjin South Port

2014 ◽  
Vol 1010-1012 ◽  
pp. 630-634
Author(s):  
Hang Yu
Keyword(s):  
Model Test ◽  
Deep Water ◽  
Simulation Study ◽  
Environmental Effect ◽  
Large Angle ◽  
Design Parameters ◽  
Sewage Discharge ◽  
Environmental Material ◽  
Port Engineering ◽  
Marine Environmental

The sewage diffusion is an environmental material for marine environmental protecting. It plays an important role in port engineering now. Its effect under deep water was carried out between different diffuser design parameters based on the hydraulic model test, and sewage marine disposal project in Tianjin south port was taken as an example. For this project, jet angle was controlled to be 0 degree, and horizontal angle was controlled to be 45 degree. It not only can ensure that sewage fully diluted mixed, also can avoid the premature convergence and sewage lifting. It is feasible for selecting large angle nozzle under deep water and there are some technical bases have been provided for other sewage marine disposal project.

scholarly journals Robustness of Adaptive Survey Designs to Inaccuracy of Design Parameters

2017 ◽  
Vol 33 (3) ◽  
pp. 687-708 ◽  
Author(s):  
Joep Burger ◽  
Koen Perryck ◽  
Barry Schouten
Keyword(s):  
Simulation Study ◽  
Optimization Problems ◽  
Distance Measures ◽  
Design Parameters ◽  
Parameter Estimates ◽  
Design Features ◽  
Simple Simulation ◽  
Minimum Number ◽  
Survey Designs

Abstract Adaptive survey designs (ASDs) optimize design features, given 1) the interactions between the design features and characteristics of sampling units and 2) a set of constraints, such as a budget and a minimum number of respondents. Estimation of the interactions is subject to both random and systematic error. In this article, we propose and evaluate four viewpoints to assess robustness of ASDs to inaccuracy of design parameter estimates: the effect of both imprecision and bias on both ASD structure and ASD performance. We additionally propose three distance measures to compare the structure of ASDs. The methodology is illustrated using a simple simulation study and a more complex but realistic case study on the Dutch Travel Survey. The proposed methodology can be applied to other ASD optimization problems. In our simulation study and case study, the ASD was fairly robust to imprecision, but not to realistic dynamics in the design parameters. To deal with the sensitivity of ASDs to changing design parameters, we recommend to learn and update the design parameters.

scholarly journals Sample size requirements to estimate key design parameters from external pilot randomised controlled trials: a simulation study

Trials ◽  
2014 ◽  
Vol 15 (1) ◽  
Author(s):  
M Dawn Teare ◽  
Munyaradzi Dimairo ◽  
Neil Shephard ◽  
Alex Hayman ◽  
Amy Whitehead ◽  
...  
Keyword(s):  
Sample Size ◽  
Simulation Study ◽  
Randomised Controlled Trials ◽  
Design Parameters ◽  
Controlled Trials ◽  
Randomised Controlled
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