Skip to main content

Blog posts

HW 15

Submitted by Yuhang Hu on

Title: Theory of Plates and Shells

Author:  Stephen P. Tomoshenko and S. Woinowsky-Krieger

Contents:

Chapter 1: Bending of long rectangular plates to a cylindrical surface .

Chapter 2: Pure bending of plates.

Chapter 3: Symmetrical bending of circular plates

Chapter 4: Small deflections of laterally loaded plates

Chapter 5: Simply supported rectangular plates

Chapter 6: Rectangular plates with various edge conditions

Chapter 7: Continuous rectangular plates

A quesntion of Negative Eigenvalues in Buckling analysis

Submitted by Gang Liu on

A simple model was constructed to convince the analytical solution and a numerical results.

For instance, the instability of an Euler column was investigated under uniform pressure with magnitude equal to 1 on the top surface. The FEM calculation (Abaqus) exhibits that the eigenvalue for mode 1 is negative and the minus value cann't  be transformed to positive though I have try to variate the mesh size and category as well as  calculative measures with Lanczos or subspace.

BTW: the step for this model is applied with Buckle in Linear perturbation

"Crack" versus "Fracture"

Submitted by Andrew Bunger on

 It seems that within the field of fracture mechanics, some authors use "fracture" to refer to the mechanism of creating new surfaces within a body by breaking the material bonds and reserve the word "crack" for the sharp-tipped discontinuity that results from fracture of a brittle material. But it does not appear that this distinction is followed consistently throughout the literature, and perhaps different research areas within the fracture mechanics field use the two words in different ways.

we sell tungsten and molybdenum and stainless steel products

Submitted by titech123 on

we mainly produce stainless steel plate, stainless steel sheet, stainless steel coil plate, stainless steel tube, stainless steel pipe, stainless steel strip, stainless steel rod, bar, wire rod, stainless steel wire, welding wire and Stainless steel elbow, stainless steel fastener, stainless steel screw, stainless steel bolt, stainless steel forks, stainless steel valve; tungsten wire, white tungsten wire, tungsten rod, bar, tungsten plate, sheet, tungsten powder, tungsten tube, pipe, tungsten ring and tungsten alloy ring, tungsten axes and tungsten alloy axes, tungsten crucible, tungsten b

About SIESTA MD Package

Submitted by Apurba Mandal on

Hi

Is there anyboby to help me. Actually I am facing some problem during the use of SIESTA (Spanish Initiative for Electronic Simulations with Thousands of Atoms) package. The problem is that How to generate the Pseudopotential file. And the use of Vibra utility. During the use of Vibra package i cant able to run it properly. 

Questions on ferroelectrics: why tetragonal ferroelectric ceramics are difficult to pole while rhombohedral ceramics easy to?

Submitted by Faxin Li on

 

It may be well known to researchers on ferroelectrics that tetragonal ferroelectric ceramics, such as BaTiO3, Ti-rich lead titanate zirconate (PZT), are difficult to pole even using a high DC field with long holding time. While the rhombohedral PZT or PZT near the morphotropic phase boundary (MPB) are easy to pole, especially the latter. Why?

 

15. Recommend a textbook that you think will help students in this course

Submitted by mingguo on

Theory of Elasticity by Landau and Lifshitz.

http://www.amazon.com/Theory-Elasticity-Third-Theoretical-Physics/dp/075062633X

content:

1 fundamental equations

2 the equilibrium of rods and plates

3 elastic waves

4 dislocations

5 thermal conduction and viscosity in solids

6 mechanics of liquid crystals