Aluminum and Acrylic Plate Design

To see only the CAD and FEA images, click here to go to this projects section in the CAD Portfolio

1. Introduction
2. Creating the Design
   1. Dimensions of our Design
   2. FEA Results
3. Physical Testing

 

 

Introduction

I worked with Peter to do this. We worked on seperate ideas: Glue vs Fasteners, and both made CAD Models and did FEA. We both wrote and edited the report.

Material Properties of the Given Mateials

	Young’s Modulus	Yield Strength	Poisson’s Ratio	Density
PMMA	3.1 GPa	70 MPa	0.35	1.19 g/cm3
AA110-O	68.9 GPA	34 MPa	0.33	2.77 g/cm3
Epoxy	3780 GPA	16.7 MPa	0.35	1.16 g/cm3

 

Creating the Design

3D Model with Dimension:

ANSYS Set Up and Results:

ANSYS Mesh	ANSYS Forces	ANSYS Results
Mesh of the joint. The mesh was refined around the holes seen here, and at the epoxy layer hidden from view.	A force type load was applied at the PMMA loading hole, seen as a red vector. A fixed support was applied at the other loading hole, indicated as ‘A’.	Maximum stress at the loading holes. Other points of interest were the thin arms about the hole, which had a larger deflection.

Convergence of Stress

Graph	Table with Numbers

 

Physical Test Results and Future Work

We decided, due the brittle nature of the acrlic and due to the fact we were designing to ultimate failure, we should have used a flexible bonding material. For example, a foam tape. We also should have reduced the area on the acrylic that would have attached to the aluminum plate.

Fracture	Potential Changes to Shape

 

Notes:

Mainly just images - more work to come.