Recent content by iqjump123

Hello all, I am in the process of calculating reaction forces on an object, and need some help. Attached is a free body diagram of an object in two different views- one looking from the sides (z-x plane) and one looking it in birds eye view. (xy plane) 7 variables I am looking to solve are...

Thanks for your reply. To be more specific, I am specifically looking into the compressive buckling coefficients for flat rectangular plates (from analysis and design of flight vehicle structures by Bruhn). Looking at all of the case with applied loads, all of the plots here assume uniaxial...

hello all, I am in the process of measuring coefficients of a rectangular panel using given table in textbooks to obtain them. I have attached a simple figure of two situations; left is my current situation to analyze- a clamped end and compressive force on the other end. The situations...

Hey everybody, I went through a discussion with a colleague today about Finite element modeling of composite structures and how to interpret the stress analysis. I understand that for isotropic materials, principal stresses could be used against the allowable stresses to see if failure will...

Homework Statement The problem statement is as stated in the attached image, For a given E and cross section of both beams, I am to find the reaction at roller E that attaches beam AB and DC Homework Equations There should be stress relation equations and reaction equations. First is...

Hey guys, I know this is bringing up an old topic, but I wanted to inquire about something, as well as make sure I approached the final equation correctly. To clear up the confusion from vela- yes, I am planning to go with the description saying that since they said to find the volume as...

hello tiny tim! It has been a little bit but I wanted to revisit this thread. I really appreciate your help. As you explained, it seems that the 3rd order characteristic equation equating for y is getting me 3 roots that don't seem plausible for my problem. (one decimal real value, two...

hello nvn, I appreciate the help, as always. I have one question about the figure. I noticed that there is an arbitrary value of h, and the point c. I presume that is the line that is intersecting at the axes. Can I assume that any of these values (h, location of pt c, angle phi) is...

Yes it feels I will need more background information in order for me to solve this problem. thanks for the help. If you can recommend in any of the textbooks, articles to help me understand this, it will be helpful.

Thanks nvn. To clarify-I never did and do not intend to just get answers nor have anybody do the work for me on this forum. I just want to get the help I need to learn. After all, the reason I am solving these problems is to get myself ready so I myself can solve them in the exam. Back to...

nvn, thanks for your prompt reply, and happy new year. :) This is actually a preparation question for an exam I am taking. your description is almost correct- the pressure vessel from the side view, it looks like an ellipse with major diameter being vertical, minor diameter being...

Homework Statement derive the equilibrium state of the stress at a point in a circular pressurized vessel, membrane equation, in terms of σ_a and σ_b and internal pressure b. Figure is picture of a thin walled pressurized elliptical vessel (like a sphere vessel except with horizontal...

Thanks NascentOxygen! I think I need to clarify on a couple things from my end. The test involving isolating the chip to test its performance was already done; with input generator hooked to the input directly and the output of the chip directly measured by the oscilloscope(so no resistor...

Hey nascentOxygen, thanks for the prompt reply. First of all, I put no resistors on the gain inputs of the AD622, because the amplifier datasheet states that with no resistors on it, the chip gives a default gain value of 1. The diagram above was to visually show the current circuit I am...

Hey AlephZero, thanks for the reply. The AD622 has the typical unity bandwidth as 1MHz, with a supply of up to +/- 15V. I don't know where I can find the information for output impedance measurement in the datasheet, however. The problem with the decreasing gain still persists, and from...