Hello,
Why does ISO 13920 say that the length of the shorter leg determines the applicable tolerance for the angular dimension of a weldment? Wouldn't the deviation be dependent on the longer leg?
Hello,
I am an engineer but not in Manufacturing or Quality. The company that I'm working for does first article inspection (FAI), in-process inspection (IPI), and final inspection (FI) on any part manufactured in house. My understanding is that the company's FAI looks at all dimensions on...
Hello,
I would like to test for a difference between a single lot of injection molded parts from each cavity of a symmetric two-cavity mold. I'm not sure whether to use a two-sample t-test or a paired t-test. Which test is appropriate for this case? I assume that the answer doesn't change if...
Hello,
Left and right lungs are pneumatically in parallel. The compliances of springs in parallel add as reciprocals, so why do lung compliances add directly?
This seems like the most logical forum to post this question. For a cube that measures 2 inches on each side, which one of the following is what you would write, assuming 8 in^3 isn't an option?
A. 2 in x 2 in x 2 in
B. 2 x 2 x 2 in
C. 2 x 2 x 2 in^3
D. (2 x 2 x 2) in^3
Hello,
The chapter on torsion in my Advanced Mechanics of Materials textbook from university says that, for a solid section with a given cross-sectional area A, stiffness is greatest when the centroidal polar moment of inertia K is least. What confuses me is that twist (= TL / GK) is inversely...
An old textbook of mine says to use the power, not pressure, formula when combining noises but later that ten identical sound sources have an SPL 10 dB louder than just one source. Shouldn't it read PWL (power level of the noise), not SPL (sound pressure level)?
Hello,
My new workplace just has linear FEA software (for now), so can anyone help me out by running VM40 (www.kxcad.net/ansys/ANSYS/ansyshelp/Hlp_V_VM40.html) with and without NLGEOM,ON to determine the minimum rotation for which the nonlinear and linear solutions significantly differ? Thanks...
Hello,
Does anyone know the viscosity and density of RFO-3 oil? http://answers.google.com/answers/threadview?id=504559 refers to the SAE J1260 standard.
Hello,
Does anyone know the viscosity and density of RFO-3 oil? http://answers.google.com/answers/threadview?id=504559 refers to the SAE J1260 standard.
Hello, I'm a new SW user (occassional). I've defined global variables to drive dimensions, but can I input a global variable as a parameter? For example, let "Spiral_Pitch" = 1. The Helix/Spiral PropertyManager won't let me enter anything other than a number for the pitch parameter. I don't...
Hello,
Why are a diaphragm pump’s inlet and outlet reed valves located away from the center of the diaphragm? I would think that the pump would be more efficient if the valves were near the center, where diaphragm deflection is largest. Do you know of any relevant studies?
Two questions about archived thread727-53543:
1. GSC ended the thread by saying, "Setting linear or piecewise linear elastic properties with poisson ratio > 0.495 could give fairly good results at small deformations only." I would think that using a Poisson's ratio >= 0.49, even for small...
Does anyone have "Mechanics of Materials" by Gere and Timoshenko? I’m wondering how much deflection of a cantilever beam relative to the beam’s thickness is considered to be a problem with geometric nonlinearity.
Hello, I would like to obtain or create a liquid of known density and absolute viscosity (~40 cP) for testing purposes. Can anyone suggest an aqueous solution and supplier so that I can customize the kinematic viscosity? Thank you.
The hardness at http://business.fortunecity.com/rowling/167/LARCSI.html is shown as “23-27 R ASTM E384-89.”
I am assuming that the "R" is Rockwell R, which cannot be measured by ASTM test method E384 (Knoop, Vickers).
Perhaps the measurements were made in accordance with ASTM E384 and...
Does anyone have info on heat transfer coefficients for impinging air flow? Ideally I'd like the HTC for impingement at a 90 deg angle with the finned side of a heatsink. Thanks in advance.
Our company has Mathcad, but I have never used it before and am much more familiar with Excel. I'd like to solve a system of partial differential equations. Does anyone already have a macro for doing this? Thank you.
Our company has Mathcad, but I have never used it before. I'd like to solve a system of partial differential equations. Can anyone provide a Mathcad for Dummies step-by-step? Thank you.
