Simulate the compression test, Mechanical Engineering

Assignment Help:

This assignment will simulate large deformations (nonlinear geometry) and occurrence of necking and buckling due to static tensile and compressive loading of a given elastic-plastic ductile metallic material.

The aim of this assignment is the investigation of computationally effective solution methods to simulate unstable large deformations.

Assume the material to be aluminium. The characteristic curve in the plastic range can be fitted to a material law given by

419_Simulate the compression test.png, where E= 70GPa, s0=200 MPa, B=3.0 GPa and H=4.0

Assume Poisson's ratio to be n=0.25.

1) Simulate the tension test for the following specimen geometry:

  • The specimen has a 0.1*# mm width and thickness (solid square) cross-section with 0.4*# mm length

2) Simulate the compression test for the following specimen geometry:

  • The specimen is a slender plate, 0.6*# mm height, 0.2*# mm width and 0.02*# mm thickness
  • Include different imperfections (maximum out-of-plane centre imperfection is 50%, 100% and 200% of thickness) into your model for the nonlinear analysis.

For both models, # = 100 + the last two digits of your student number (e.g. for s123456 -> # = 156).

Introduce the given material properties into your models as discussed in lecture 3 on plasticity (you might want to use software such as Excel to generate the data). Apply appropriate boundary conditions for each loading case. Analyse results to reproduce the characteristic curve of the material as usual in analysing the results of experimental tests. This means that you need to produce force-displacement diagrams for each test (in-plane and out-of-plane when appropriate). Using constraints for the applied boundary conditions on the top plate are very useful in this case!

Simulate elongating both specimens statically by 25%.

Assume all models to be welded to rigid blocks at both ends. Due to these boundary conditions (fixed-fixed), determine why imperfections are required to introduce buckling in the nonlinear model, but necking occurs without imperfection. Determine the differences in the buckling response with different levels of imperfection.


Related Discussions:- Simulate the compression test

Explain the evaluation phase of auger shaft, Explain the Evaluation Phase o...

Explain the Evaluation Phase of auger shaft Evaluation Phase of auger shaft Steps: 1. To judge the ideas generated in the creation phase for ability to meet the required

Coil circulation pump, Q. Coil Circulation Pump? Type of pump, vertical...

Q. Coil Circulation Pump? Type of pump, vertical in line. Locate on supply side of coil. Valving indicated, isolation valves on suction and discharge, check valves on bypass. P

Theory of machines, What'' is balancing and vibration in machines Need of ...

What'' is balancing and vibration in machines Need of balancing? Causes of vibration and their harmful effects and remedies?

Explain about hardness testing, Q. Explain about Hardness testing? When...

Q. Explain about Hardness testing? When indicated on equipment or vessel data sheets, hardness testing shall be performed as follows: a) Perform hardness tests at or near th

Find the tangential and normal components of acceleration, Find the tangent...

Find the tangential and normal components of acceleration: A fly wheel along diameter 400 mm begins from rest with constant angular acceleration 2 rad/sec 2 . Find out the tan

Valve clearance and tappet adjustment, Valve Clearance and Tappet Adjustmen...

Valve Clearance and Tappet Adjustment: Like all metal components the valve expands on heating. Hence the valve clearance is set so that on expansion there is room for the valve to

Thermodynamics, Problem specification 5 kg of air is contained in a piston-...

Problem specification 5 kg of air is contained in a piston-cylinder device, initially at a pressure of 2MPa and a specific volume of 0.08m3/kg. The air then expands, as an ideal ga

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd