Per the title: Is it legitimate to use a projected tolerance zone for the position of a slot, as you would with a hole.
I think that it is legitimate based on my understanding of projected tolerance, but I've never come across it in the wild.
ASME Y14.5-2009 Para 7.4.1 recommends use of...
Hello,
Been a while since I posted here. I've got a situation where I need to apply a position tolerance to the centerplane of a dovetail slot.
Since the dovetail slot is a complex shape and the functional part is tapered, I think that the centerplane of the slot is not entirely clear. So, I...
I'm faced with adding a specific material property control to a region of a forging.
When working with machined parts, it's common to apply controls to "AREA"s (e.g. a length along a diameter requires a tighter tolerance or some special processing).
However, I don't think that I've ever had to...
Recently, I've been using Python to generate APDL run scripts for (somewhat complicated) mission analyses in ANSYS. File management can be difficult for such analyses, and it is helpful to be able to easily verify that a particular set of input files was run for a given set of outputs.
To do...
I know a width dimension has to have perfect form at maximum material condition per Rule #1, but if I need to apply a refinement to control the form of two faces defined by a width dimension, what's the best way to do that?
I know that I could establish a datum from one of the faces and then...
I've worked at several companies in my career. The latest one outlined an expectation of at least 4-5 hrs/week of unvouchered overtime (beyond 40 hours). They call it "casual overtime". I understand that companies aren't required to pay engineers overtime, and that's fine... I just thought that...
Hello, I'm struggling with the best way to define a thin sheet metal part (.010" thk). My part is a fairly simple stamping which is rolled into a "C-shape". The stamping looks like a long-thin strip with some features... you could think of the part as a rolled up Chevrolet logo. The design...
I ran into an interesting scenario that I wasn't sure of the best way to handle. I'd like to define a feature that exists at MMC, but doesn't exist in the nominal profile of the part.
The particular geometry that I'm looking at is a machined radius that breaks out of a cast surface. I'd like...
Good evening. I've been banging my head against the wall a bit trying to compute the moment of inertia of an assembly by hand. The reason for computing the MOI in this way is because the organics in some components (epoxy, potting, etc.) are not accounted for in our Solidworks model, so I've...
I'm working with one of our customers to determine the maximum allowable flaw size in our hardware during inspection to meet life requirements.
FEA models (and hand calculations) produce complex stress states which must be boiled down to a stress range for fracture/fatigue calculations. I've...
I'm wondering if anyone else has run into this sort of problem: I'm getting step changes in my contour plots along lines of symmetry in my radiation cavities.
My model is 1/8 symmetry and I'm using RSYMM to reflect the geometry. I get step-changes in the my results along the lines of symmetry...
Hey everybody! I made a blog post describing how to make great plots in Octave and Matlab. Hope someone finds this helpful:
http://engineeringliberty.wordpress.com/2011/10/07/making-great-plots-in-octave-and-matlab-too/
//signed//
Christopher K. Hubley
Mechanical Engineer
Sunpower Incorporated...
Ok... well I feel foolish. I didn't have Vera loaded on this machine. I tried Arial and it worked:
title("Pressure Vessel Cylinder\nStress Distribution",'FontSize',8,'FontName','Arial')
That said, I can't seem to figure out how to list what fonts are available. Any suggestions there? I tried...
I'm having a bit-o-trouble with one of my 3D models and I was wondering if anyone on here might have some insight. I have a pretty large thermal model with quite a few types of boundary conditions. One of the boundaries is a volumetric heat generation (in some heater cartridges). If I apply 25%...
Hey folks. I was wondering if you guys might have some suggestions for a electronics design reference book. I'm thinking of something along the lines of Shigley's "Mechanical Engineering Design," but for electronics.
A couple of my friends and I are looking at designing a better robotic...
I'd like to include radiation to ambient in my model. I've already got SURF152 elements on the exterior for convection, and I think that I can apply ambient radiation to those. However, when I try:
NSEL,s,TYPE... blah blah blah
SF,,RAD,0.15,29
ANSYS doesn't like it.
I tried changing KEYOPT 9...
Just a curiosity, really, but I was wondering if anyone knows of any modern applications for hot-driven rivets. I was trying to think of someplace where they're commonly used (or used at all) in modern designs... and I couldn't. They used to be used all of the time in ships and bridges, but...
Quick question: Does it violate standards to dimension to a background line in a section view?
In my view, it's bad practice, but I'm not sure that it's explicitly disallowed by any standards. We do our drawings in accordance with ASME Y14.5-1994. Unfortunately, I don't have my copy with me at...
I came across this usenet post from the early 80s: a response to another article called Real Programmers Don't Use Pascal. It's called "The Story of Mel", and I thought I'd share. Apparently Mel was a real programmer at Royal McBee Computer Corp (pictures of some of his routines here). Although...
I was wondering if anyone has had any experience with VariCAD as a design tool. The cost is attractive and it works in Linux, which is nice. I'm wondering how well it handles more complicated tasks like layouts and assemblies. Can it generate parasolids or IGES files for analysis?
I was looking...
