of a Novel Pipe Connection Mechanical Analysis of a Novel Pipe Connection

Outline Mechanical Analysis of a Novel Pipe Connection Introduction Experimental Validation Conclusions & Recommendations I want to thank Professor Rixen for the introduction. For the up-coming 25 to 30 minutes I will try to explain what I did for my graduation project. By first I giving a short introduction of the origin of the project, explain what the aim is of the project and which approach that I took. For that approach I will only discuss the most important topics in my presentation, like the mechanical analysis of the novel pipe connection. Where I will try to explain what I did to meet my requirements, the aim of the project. A model is still a model if there is no experimental validation, so it is very important to verify the model en hopefully it will become apparent why this is very important. Last but not least I treat the conclusions and recommendations. After my presentation you will get the opportunity to ask questions, so please keep your questions until after the presention.

Introduction Mechanical Analysis of a Novel Pipe Connection Origin Replace expensive screw-type of connections

Introduction Mechanical Analysis of a Novel Pipe Connection Objective Develop a generic method to calculate: manufacturing force collapse strength

Introduction Mechanical Analysis of a Novel Pipe Connection Basic Idea Sequence Forming Process

Approach Introduction Mechanical Analysis of a Novel Pipe Connection Literature Study Material Charaterization Design Equipment Layout and Die Conclusions & Recommendations Preliminary Study Refined Analysis Experimental Validation

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Objective is to optimize the configuration: Small : Collared Pipe 88.9 mm x 4 mm – Muff 114.3 mm x 6.3 mm Big : Collared Pipe 114.3 mm x 4 mm – Muff 137.9 mm x 6.3 mm Optimalisation can easily be preformed on a Surface Response Function (SRF) SRF is obtained with Finite Element Analysis by means of DOE

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Which Design Of Experiments (DOE) is used to find maximum collapse strength? Why is material modelling important? How is Finite Element Model (FEM) Build-up? How do the design parameters influence the manufacturing forces and collapse strength?

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection LHD is able to capture trend of Response Surface (RS) 30 evaluation points are chosen in the 2D design space

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Higher stress for the same amount of total strain, results into a higher predicted force. Therefore the real material behavior is very important

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Load Step 1

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Load Step 2

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Load Step 3

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Load Step 4

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Load Step 5

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Small Novel Pipe Connecting Big Novel Pipe Connection Load Step 1 Manufacturing Force

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Small Novel Pipe Connecting Big Novel Pipe Connection Load Step 3 Manufacturing Force

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Small Novel Pipe Connecting Big Novel Pipe Connection Load Step 5 Collapse Strength

Refined Mechanical Analysis Mechanical Analysis of a Novel Pipe Connection Conclusions: The design parameters R and θ does not really have an influence on the manufacturing force in the Load Step1 The design parameters R and θ does have a small influence on the manufacturing force in the Load Step3 The maximum Collapse Strength for the: Small Novel Pipe Connection is for R = 8 and θ = 24 Big Novel Pipe Connection is for R = 9 and θ = 24

Experimental Validation Mechanical Analysis of a Novel Pipe Connection Design to be validated is chosen in between DOE points to include SRF in validation How are the experiments Setup for the Tube Sinking Process Collapse Strength Verification How well are the forces predicted compared to the experimental validation?

Experimental Validation Test Setup Tube Sinking Experiments

Experimental Validation Results Tube Sinking Experiments

Experimental Validation Test Setup Collapse Experiments

Experimental Validation Results Collapse Experiments 212 kN 205 kN

Conclusions Mechanical Analysis of a Novel Pipe Connection The RS is a good approximation, because the predicted maximum: manufacturing force is 6.1% off collapse strength is 3.3 off The found optimum for a: Small Novel Pipe Connection is R = 8 and θ = 24 Big Novel Pipe Connection is R = 9 and θ = 24 Note: Prerequisites are valid for seamless tubes, same dimensional configuration and steel quality S355J2H This approach can be used as a basis to create a more generic calculation method

Recommendations Mechanical Analysis of a Novel Pipe Connection Duration test needs to be performed to get inside on the “relaxation” process of the novel pipe connection Feasibility of welded tubes should be investigated and failure mode during the ultimate collapse test

Questions