Is it correct to dimension an edge from a radius with a position tolerance on it? I want to control this edge as it sandwiches a cylindrical part. See attached photo. Thanks.https://files.engineering.com/getfile.aspx?folder=e78422e2-980b-4134-b0a6-39f7321855ec&file=GDT_Question.JPG
Hi,
I am trying to determine the load at which a weld will shear. Basically a solid metal disk is pressed into a tube and then they are laser welded together through the tube (weld penetrates into disk). My question is, can you use T = F/A where T = 0.75 UTS to ball park a load? is the...
Hi,
I am trying to determine the load at which a weld will shear. Basically a solid metal disk is pressed into a tube and then they are laser welded together through the tube (weld penetrates into disk). My question is, can you use T = F/A where T = 0.75 UTS to ball park a load? is the equation...
Hi,
I have a design where a can is welded inside of a tube. Failure of the device would entail the can separating from the tube. If you were looking to predict or have some criteria to denote this type of failure what would it be eg. any elements that reach the ultimate tensile strength of the...
When calculating the max shear and bending stress in a beam using Sigma b = My/I and Tau = VQ/It, will the calculated stress be accurate past the yield stress for say a ductile steel or since the stress is distributed across more elements as it yields will the elements over yield experience less...
Hi all,
What is the best way to determine the force/subsequent stress from an impact load. I have a project where a piston rams into/is retained by a housing. The material is glass filled nylon (which is anisotropic making it more challenging) and does not have a large elastic region. Would I...
Hi All!
I'm designing for a strip of metal (b=11, h=1.48mm) to fail in shear. Its a pyro safety switch where a piston is forced to shear the strip and bend the flap of metal to create distance between the two pieces. I want to find the shear stress for a given force. I have attached an image of...
Hi all,
I am analyzing a scenario where a part impacts another part and wanted to find the stresses induced in the material (see attached picture). From what I have gathered I should use conservation of energy where the kinetic energy of the moving piston is transferred to cause deformation of...
Has anyone seen a profile of a line tolerance applied to the edge radius of a washer? To me it seems overkill...why not just use a plain old radius dim? Are there any advantages to using a profile of a line like shown below, if so how would it be measured? The B datum is attached to the outer...
Hi all,
What is the correct way of dimensioning a feature of size that is interrupted such as the height of the part below or chamfers/radii from a side view that are continuous. Eg. Would it be 4X CHAMFER or 8X CHAMFER (is it confusing/wrong to put 8X if only 4X are visible in view)/similarly...
Hi All,
What is the proper way to tolerance counterbored slots using GDT. In my case I don't care about tight tolerance on the horizontal position of the thru slot just the spacing, though obviously the counterbore itself needs to follow the contour of the thru slot. Any advice is greatly...
Hi,
I want to dimension a v block that will hold a 35mm OD tube in place. The height of the tube is most important. I have seen tapers dimensioned like this, but can this be applied to a v profile or is there a better way of dimensioning this?
Thanks,
Nick
I have a piston/cylinder design where the piston shears a thin plate of metal. The peak pressure occurs in approx. 1 ms. Once the metal is sheared the volume of the cylinder increases. A safety factor is required to ensure the bar is sheared so the pressure used is more than what is required to...
