Dear Friends, I have a bracket, a simple L bracket, with a couple of fasteners holding it down at the bottom base leg, and a horizontal pull away load at the top leg.
I am trying to figure out the reactions with hand calculations.
Two other scenarios are fairly straight forward statically...
As we all know, the FAA needs approved process specifications for mass produced parts used on multiple aircraft. I wrote a little bit I know about this.
Process Specifications are critical for a product's consistent quality, and thus 14 CFR compliance and certification...
thread727-216366
I was wondering which online finite element analysis courses you have taken, specifically which ones were good value for your money and why you thought so?
Aerospace Stress Analysis and FEA Courses
http://www.stressebook.com
Stressing Stresslessly!
One of the confusing aspects to me was the signs of the induced forces in various types of spring elements:
So, a positive spring force is always tension, right?
Well..... I found out not really, so i kind of summarized a few things here: http://www.stressebook.com/spring-element-forces/...
Dear Learned Colleagues:
I have seen some threads related to plate and laminate element offsets and decided to discuss the topic in some detail here: http://www.stressebook.com/plate-and-laminate-element-offsets1/
But I was wondering if you have any more suggestions to improve the study I...
Proof of Structure, hopefully you can learn something useful and new:
http://www.stressebook.com/14-cfr-subpart-c-section-25-307/
Aerospace Stress Analysis and FEA Courses
http://www.stressebook.com
Stressing Stresslessly!
Friends, I'd like to know if you have any useful comments or suggestions on how you have interpreted this regulation.
I wrote about it here: http://www.stressebook.com/14-cfr-subpart-c-section-25-305/
Would be nice to know your thoughts as well.
Aerospace Stress Analysis and FEA Courses...
Dear Friends,
Most of us are familiar with the membrane forces and shell element moments which are element forces and moments written out as running loads and moments to the output file (.f06 or .out files depending on the flavor of Nastran)
General notation is NX NY NXY (membrane forces)...
In a normal modes analysis, do you use PARAM WTMASS all the time or are there instances where you choose to use weight density?
Param WTMASS is generally set to 1/386.4 in english units. It converts the material densities to mass density when you use weight density in the material definition...
I wrote a blog post on these comparisons at http://www.stressebook.com/spring-elements-in-nastran/ but I'd love to know how creatively you have used them in a challenging modeling scenario.
www.stressebook.com
Stressing Stresslessly!
Some people think that aircraft cabin interiors stress engineering is dumbed down furniture stuff and low tech. But primary structure and nacelle stuff is high tech. What is your opinion?
www.stressebook.com
Stressing Stresslessly!
Dear Friends, I am in the process of double checking a simply supported 10" x 4" plate, supported at the 1.0" from the short edges. The edges are only constrained along TZ. A weak spring is used right in the middle to avoid any fatal errors. Then I used three different mesh sizes to look at the...
Dear Friends, one of my subscribers had an interesting question.
There are 5 failure theories for metals:
1) Maximum Principal Stress
2) Maximum Principal Strain
3) Maximum shear stress
4) Total strain energy
5) Shear Strain Energy or Distortion Energy (Von Mises)
We know Aluminum is...
