Yield Definition and 205 Threads

Hi! I have done a simulation where I got out the load/displacement curve of a steel beam that is simply supported with an equally distributed load across the whole length (10 m). I want to field the point at which the steel yields. I am used to use the 0,2% value on a stress/strain curve, but...

I am trying to get a plot, or a result for target like this: I've found some equations for my requested results, but they are from the same person's articles and I couldn't find another source. I've searched for EOB and TTY calculations but couldn't really do something. Could you give me an...

Uranium fission bombs have explosive power ofabout 10 000 tons of TNT. I understand that you can't make a uranium bomb with explosive power of 5 megatons of TNT brcause of the critical mass of U-235. Similarly you can't make an atomic fission weapon with explosive power of 10 tons of TNT...

Help would very appreciated. Also I am new to this website so if something seems wrong please tell me :)

Point B is elastic limit and point C is yield point. From this link: https://en.m.wikipedia.org/wiki/Yield_(engineering)#Definition The definition given is: Both seems to refer to same definition, it is the point where the elastic deformation ends and plastic deformation begins. But from...

As seen in the summary, my question is purely hypothetical and I understand that it would most likely be impossible to happen (or I just haven't read enough). The concept that quarks and leptons are the fundamental particles of the universe has existed for a while now - therefore we know that...

Hello all, I am trying to understand the von Mises yield criterion and stumbled across two equations for the second stress invariant. Although the only difference is a difference in signs (negative and positive), it has been bothering me. Attached are the two versions. Which one is correct and...

Is percent yield based on grams or moles? Thanks.

Does anyone know what the minimum speed of a gyro to make it so a force at 0deg will yield a movement at 90deg... or even better, what the angle is wrt speed... see http://www.copters.com/aero/gyro.html for pictures. -thx, rich

Conversion: 1.0 t = 1.0x10^6 g impure Si Conversion: 2.33 t = 2.33x10^6 g SiCl4 Atomic Mass Si = 28.085 g/mol Atomic Mass Cl2 = (2 x 35.453) = 70.906 g/mol Mass SiCl4 = 28.085 + (4x35.453) = 169.897 g/molI got all this part down, however, I'm not quite sure where I am supposed to go from there...

Summary:: We are given a description of a reaction and the masses of two reactants and are initially asked to calculate which of two is the excess reagent and how much of the excess reagent would be left over if we have 100% completion. Then we are given a final mass (after purification) of the...

I work in research paper on medical isotope production. I need a software where i can measure the cross section and Irradiation Yield like TALYS and EMPIRE. If you ask me why i don't use TALYS then the reply is I can't install it on my PC. so i am looking for alternate software where i can do...

Why does U-238 tamper increase nuclear yield of nuclear bomb? I mean it is not fissile.

Hi guys. Recently I've been assigned to know / calculate the capacity of the racks in our section. Our racks has layered steel pipes that are carrying the loads. After actual testing it can carry a load around 25 tons after yielding or having a bend. So my next step was to calculate for its...

The answer given for (2) is " lower pressure" , isn't increase pressure, the reaction will proceed towards fewer moles of gas, therefore increase the product yield for this question.

Hi just one question. Can someone point to me some resources on how to calculate the actual yield under experimental conditions? thanks.Adrian

As in the summary, my question is : has the actual yield of the above reaction being determined experimentally?Thanks.Adrian Tudini

David Deutsch, a theoretical physicist, talks about David Bohm in his book "the Fabric of Reality": "[w]orking out what Bohm’s invisible wave will do requires the same computations as working out what trillions of shadow photons will do. Some parts of the wave describe us, the observers...

Summary: Yield Strength value as well as maximum load capacity. Need equations and possibly a break down on how to solve the issue. So let's say I have a Wooden Street pole and I want to mount a steel bracket using metal bands to the street pole. The bracket will be mounted to the beam using 4...

I'm trying to learn some new engineering, so if something I ask doesn't make sense -- remember I'm new to this. I need to calculate how much force a part can take before breaking. Material: resin (Flexural Yield Strength: 6752 psi) - (Tensile Strength: 3390 psi) - (Density [lbs/gal]: 9.64) -...

Hello, My name is Adam and I am experimenting with wood gas. I recently came across a really cheap wood chip source and would like to compare it against electrical utility prices. I am curious if running an old generator would be cheaper than off peak rates of $0.065/kwh. As of right now, I...

Hello! I am in a student-run engineering team that heavily utilizes fiber reinforced plastics, and I am just trying to get a better understanding of FRPs. I am wondering how exactly the fiber reinforces the plastic. Let's say the yield strength of the fiber in the 0 degree tensile direction is...

Hi All I am trying to understand a stress / strain curve for a ductile material. But I am struggling with understanding the difference between the Elastic Limit and the Yield Point. I define these terms as:- Elastic Limit - Is the point on the stress/strain curve where the material will...

Hi all I was hoping someone could shed some light on the following:- I am trying to understand what Yield strength is and understand the exact limit of where elastic and plastic deformation occurs on a stress strain curve. Correct me if I am wrong but I define:- Yield strength as the amount...

Consider a five-year, 1000 dollars bond with a 5% coupon rate and annual coupons. If this bond is currently trading for a price of 957.35 dollars, what is the bond's yield to maturity? F = 1000 dollars c = 0.05 P = 957.35 dollars N = 5 years y = ? I used the formula presented here for the...

Hey there! I'm about to do some tests with rotating boundary layers and wanted to use rotating sheets of paper (cut into circles) as this would be ideal for my experiments. I was researching various materials but couldn't find yield and tensile strengths for different types of paper (printer...

I have found sources that state hardness can't be correlated to yield strength, but only to ultimate strength. Other sources state the opposite. Yet other sources claim you can do both with different equations. Can someone direct me to a source that addresses my question, or addresses the...

Homework Statement I am given 2NH3(g) + 2.5O2(g) ⇌ 2NO(g) + 3H2O(g)+heat. By using Le Chatelier's principle, describe and explain four ways in which an industrial chemist could increase the yield of nitrous oxide. Homework EquationsThe Attempt at a Solution For 2NH3(g) + 2.5O2(g) ⇌ 2NO(g)...

I don't understand the difference between the elastic limit and the yield point. I understand that if you stretch a material within the elastic limit, then the material should return to its normal shape. However, the yield point is described as the point at which a permanent increase in length...

Homework Statement Consider: 2 mol Reactant A (aq) + 3 mol Reactant B (aq) = 6 mol Product A (aq) + 1 mol Product B (s) You have 0.00075 L of a 0.0514M solution of Reactant A. In the lab, you combine it with 0.042 L of 0.0753M of Reactant B. You get a solid product and an aqueous product (a...

in the design of the hydrogen bomb ''castle bravo'' they usd lithium deuteride for the secondary part of the bomb. the yeld of the bomb was supposed to be 5 Mega Tons but it was 15 i have 2 questions 1) why they usd LiD as a fussin full instead of normal deuterium 2) why did the lithium acted...

Ok so this week I was studying aerodynamic differences between a "Fat Man" bomb which was dropped on Nagasaki and the Aim 120c Air to Air Missile. What intrigued me with nuclear weapons was the "Variable Yield", SO I did some research to see how it works . I couldn't mind much on how to adjust a...

I hope you enjoy the image I made to facilitate my query. I wanted to add Thor as my force input but don't want any copyright infringement.. If I have a compression spring with a spring rate of K, on a fixed surface with an apple on top and a hammer... If hammer applies force N, what does the...

Hi, I am currently needing to place (and weld to the ground) a shipping container on a low bridge that is perpendicular to the shore. I was wondering if anyone knows how much force the sides of the container can withstand before buckling and/or bending. In essence, we have to account for very...

I've been digging through literature the last few days, and I'm starting to wonder if increasing strain rate EVER decreases yield stress? I found anomalies which increase it with increasing temperature. But I cant' find the reverse, so I was wondering if it was possible?

Homework Statement [/B] I had an inorganic lab this week which involved making VO(acac)2 from VOSO4⋅xH2O. In order to calculate the percentage yield, I need to work out x, that is, the number of water molecules coordinated with the vanadyl sulfate n-hydrate before the reaction. I'm stuck...

Homework Statement Homework Equations All Equations Below The Attempt at a Solution [/B]

I have three questions. 1. How do I calculate the yield pressure for a Bingham plastic in a tube if I am given: Length of tube Diameter of tube Yield stress of liquid 2. Is it possible to engineer a liquid to have a specific yield stress ? 3. What kind of material would be suited for...

Hi Forum, I´m happy I found this forum... I hope someone can answer my (simple) question: According to this thread https://www.physicsforums.com/threads/calculating-0-2-proof-stress-of-aluminium.206648/ on page 2 the stress/strain diagram is not the same as force/elongation. Due to the constant...

Homework Statement In Euler's theory , it's stated that the critical stress of beam is always larger than the yield stress of beam ...I don't really undertstand the differnce between them . Critical stress is defined as the stress that the mximum stress applied before the beam starts to...

I am going through a literature where the terms like ( 'plastic yielding' , 'plastic yield strength', plastic strength' and 'plastic stress') are regularly used and I am confused. Are they different and if yes then how each term differs from the other? I also want to know relation of plastic...

Homework Statement I was told that yield point is a point which the material which will have an appreciable elongation of yielding without any increase in load . my question is If there's no increase load , how can the material elongate ? Homework EquationsThe Attempt at a Solution IMO ...

Some metal give two yield point in stress strain diagram. One is called Upper yield point and Lower yield point. Why lower yield point is considered as more reliable. I can think of Upper yield point is much more dependent upon experimental apparatus settings. So why lower yield point is much...

Hi Community, I have this question which I have been able to partially answer. Part 1: From samples, we measured the Flexure Modulus of a material and was asked to solve for the deflection of the material at a $1m$ span and $1kg$ which I used $$Maximum Deflection = \frac{wl^{3}}{48EI}$$ $W$...

I need to know why the Engineering stress increases after reaching the yield stress point, and continues to increase until reaching the UTS. Am I correct when I remember that there is strain hardening that occurs along the region from Yield stress to the Ultimate tensile stress? Engineering...

I'm using the textbook Electricity and Magnetism by Purcell. In the section about continuous charge distributions I found the following formula \mathbf{E}(x,y,z)= \frac{1}{4\pi\epsilon_0 } \int \frac{\rho(x',y',z')\boldsymbol{\hat r} dx'dy'dz'}{r^{2}} . It's stated that (x,y,z) is fixed...

I have a flat steel bar (30 mm width, 5 mm thick, 1100 mm long). The bar has a load applied in the centre of 100N. the bar is fixed at both ends with a single concentrated load P applied mid-span the maximum yield stress is 250 MPa (250x10^6 Pa) How do I calculate the maximum load the bar can...

Hi! Could you help me to find the yield strength at temperature SA-789/SA-789 М.

I was calculating the anticommutator between the momentum operator p and the position operator x (just pretend that p and x have the little operator hats above them). Here is the expression: {p , x} = px + xp Now we know that p is as follows: p = -i(∂/∂x) (Note: I am using natural units...

Homework Statement The figure shows the stress-strain curve for a material. The scale of the stress axis is set by s = 280, in units of 10^6 N/m2. What are (a) the Young's modulus and (b) the approximate yield strength for this material? Homework Equations E=stress/strain The Attempt at a...