Material properties Definition and 43 Threads

To mods: I didn't know whether to post it here in Mech Engineering or in Materials Engineering. Feel free to move the thread if necessary. Also, let me know if posting pictures from the ISO may be a problem. Stainless steel screws are denoted by their grade and property class (mechanical...

Hi, I have data of impedance but due to limitation of software after measurement I do not receive numerical values for admittance and real conductivity vs frequency. How mathematically I can convert Nyquist plot into plot real conductivity vs frequency?

BMC is a measurement of bone mineral found in a specific area and is measured in grams (g). BMC can be measured in a specific location (i.e., arm, leg, etc.) or for the total body. BMD, on the other hand, is the amount of bone mineral in bone tissue. It is derived by dividing the BMC (g) by the...

The IPK gradually lost microscopic amounts of mass despite not being of a weak material and being far from the platinum alloy’s (it is made of a platinum-iridium alloy) failure point. Why does this happen and what materials are immune to this? Is it only materials that are made of pure elements...

I am making my own humidifier, the store bought heat based humidifiers seem to all die very fast from how hard the water is where I live. I am pumping air from an aquarium air pump (A) into a sealed gallon of water (B) through an airstone (C) so that bubbles (D) rise through water and hydrated...

Scientists finally created a 2D Supersolid! There existence has been predicted since the 60’s and now we have them. The scientists who created it don’t really know what it could be used for as it’s so much in the infancy stages, it’s practically a zygote. As an aspiring futurist, I was wondering...

a)plastic deformation because of permanent deformation b) the other parts that have been destroyed have stored the energy and this saved the passenger compartment. C) the alloy crash barrier is stronger than the car body and and saves more of the energy by deforming shape. I'm not sure about my...

Summary:: Please help me to determine the thickness of the material of the bicycle given, i need a step by step procedure. I know the formula required but can figure out the forces acting and reactions on the bicycle. The weight of the person riding the cycle is estimated to be 70-80kg Help me

I'm looking for a book series tabulating various mechanical and material properties for metals and alloys. There is a book series called "Thermophysical Properties of Matter" and it details the thermophysical properties of hundreds of elements and compounds (even including some obscure uranium...

Dear All, I don't have well background on material science. I would like to measure heterogeneity of a species (shrimp). How can I do it easily? Sincerely

Hi, I’m looking for some advice on materials. In the picture A, B and C are stainless steel. Pressure is applied at B rotating D in the socket and raising A. D needs to be as strong as possible to resist the load but I’m concerned about D rubbing against C as there is no lubrication. I can't...

Dear members, The unit of stopping power is given as Mev/cm in many sources. It is easy to comprehend this unit.The mass stopping power, which is the total energy lost per path length by a charged particle, is defined as the division of MeV/cm to the density of investigated material, g/cm3, and...

material A: E-modul:2000 yield stress:50MPa h_ET:99 h_h:200 vP:20 V epspkt:0.99 parameter used for material characteristic curve n building of material model - (linear elastic, elastic plastic and viscoplastic model) can someone explain to me what is h_ET, h_h, vP, V epspkt?

I have this fundamental question about stress and strain. If we apply same Force on two different objects of same geometry in the same configurations, will they experience the same stress? If yes, then does it imply that stress is independent of the internal material properties?

Today I've come across the statement that the coefficient of static friction of rubber tires on asphalt is bigger than that of tires on concrete. Does it mean that the maximal acceleration a car can attain on asphalt will be greater than that on concrete? My assumptions: 1)The force of friction...

Homework Statement Given a composites tube made up of +45 layup. The tube is subjected to positive torque. Suggest a new layup that will improve the strength of the tube when subject to clockwise and anti-clockwise torque. Motivate your choice. Homework EquationsThe Attempt at a Solution I...

HI Guys, I am getting an error in Ansys Maxwell that says Maxwell2d solver, process solver2d: Internal Solver Error: 'In the Material: M270-35A_12 , the SLOPE of the End Two Points in this BH curve is 56519.1, which is more than 2 times of Mu0; This may lead to a non-physical solution...

My Aim is to determine the youngs modulus of aluminium from the data we get from tensile strength test. The attached excel sheet contains all the data i am using such as elongation,load value(which is in kN i have converted to N for calculating Stress) For stress, I am using the formula...

i am doing composite analysis in ansys acp. i am using nomex hneycomb as core sandwiched with 3k twill carbon fiber on each side. i am unable to understand properties that my manufacturer gave. these are lengthwise and widthwise but in ansys i have to enter properties in x y z direction. can...

Hey there, my honours year thesis is on the design and analysis of a carbon fibre wheel for a Formula Student racecar. However, I am unable to obtain carbon fibre material properties to input into the Engineering Data section. I am required to specify the Youngs Modulus in the x, y and z...

Hey all, So the question in Jackson 1.4 is that I have 3 spheres that all have a total charge Q on them, but each sphere has different material properties. For instance, I have a conducting sphere, a sphere with a uniform charge distribution, and one with a charge distribution that has a...

Ok so I've ran into some issues figuring out what i material i should use as a driveshaft I am not going to give many specs on the engine except 20,000 peak ft-lbs torque. With the transmission in the lowest gear 5:1 and the transfer case in 6:1 the output to the driveshaft is 600,000 ft-lbs of...

So we have the standard diffraction equation for crystals, being: nλ = 2dsinθ. If we keep the wavelength and the lattice parameter the same then n simply depends on θ. So there must be a maximum order diffraction ring that you could obtain as once you get to 90° you're essentially going in the...

I was wondering what materials will stay most unblemished after the 1000s of centuries of unforeseen wear such as corrosion, salt water, grinding, etc. Materials that are not very rare like gold or silver. I have looked into it and so far I've come across titanium, stainless steel, and their...

Homework Statement Based on wave attenuation and reflection measurements conducted at 1MHz, it was determined that the intrinsic impedance of a certain medium is , and the skin depth is 2m. Determine: a) The conductivity of the medium b) The wavelength in the medium c) The phase velocity...

Hello everyone. This is my first post.. I have been given the task of building some large RF reflectors that will reflect 35GHz RF energy. Can anyone give me an idea of what material / thickness of material I could use. For an example.. Would a pyramid made from wooden pallets covered in...

1. To carry out a materials selection exercise for a military/surveillance portable infrared imager tripod. The exercise will be carried out by means of any legal and valid technique possible and applicable, including (but not withstanding) techniques described in lectures, textbooks &...

Hi all, I have a general question about material properties. We know that the material property value depends on the input level. For example, the permittivity in a dielectric material changes depending on the applied electric field. That being said, when we apply an alternating electric...

When looking at the cage or structure used to carry materials into an oven for the annealing process, what material properties are most important? Lets saying during full annealing of aluminum, the oven is heated to 540 degrees Celsius. A cage is used to carry the aluminum into the oven...

I beg forgiveness if this should be in chemistry; to me it seems more of a physics problem. This summer I had two Polyethylene terephthalate (PETE) spice bottles deform due to the sun shining on the clear plastic tub, Polypropylene(PP) in which they were stored. The first time the big tub was...

Hello sir, I am new to this forum i am looking for thermophysical properties of heavy water for my computer simulation. following properties i found in the wed. can anyone suggest me that these considered properties are correct (ref temp 40 C and 6.549 kPa) density = 1099.99 Kg/m3 specific...

There are certain properties of materials that are "artificial" in the sense that they have no direct physical basis but are sort of added into the evolution equations to get the right effect. I don't mean to sound like they are arbitrary but that they are more empirical and not directly...

I'm working on a computer model that simulates material damage in fiber reinforced polymers in extreme temperatures. I have looked around to find where I can buy some and get material properties. So far the best place I have found is Rock West Company with their quasi-isotropic lay...

I am an electrical engineer and not familiar with this. I need to look up the permittivity and conductivity, density and acoustic speed of some common fluids: sea water, de-ionized water, castor oil, alchohol, ... Where would I find some reference containing these numbers? Thank you.

Hi everybody, I'm focusing on meta-materials. I have recently read Schurig's paper "http://www.opticsinfobase.org/oe/abstract.cfm?URI=OPEX-14-21-9794"). In the article, the components of the permittivity tensor are given by \varepsilon^{i'j'} = \left|\rm{det}(\Lambda^{i'}_{i})\right|^{-1}...

I am in the middle of a large project as an undergrad mech. engineering student and my team and I are having some modeling issues. Here is a description of our task: We must modify the design of a digital spool valve for a company. We have a spool, and 2 electro-magnetic endcaps that the...

Hi everyone, Please help me, I am almost dying for this project. I am doing a project that is dealing with high temperature, and i would like to ask you guys, is there any way to get the material properties of alloy, ceramics, or glass(fused quartz) at high temperature? i have tried to...

Can anyone name for me: a] a material that has a HIGH electron affinity and is a GOOD conductor of electricity. b] a material that has a MID-RANGE electron affinity and is a POOR conductor of electricity. c] a material that has a LOW electron affinity and is a GOOD conductor of...

hello, I am trying to find electrical and thermal properties of materials such as alumina, titania, and various metal oxides at 4K and 77K. I have scoured the internet trying to find the properties and have gone to a major university library without success. Any help or resources that you...

Hi, Anyone can recommend any website that shows the material properties (such as reflectivity, heat capacity, density, heat conductivity) of both non metals and metals? Thanks in advance.

Hi, I am trying to analyze a composite part which is made of carbon/epoxy and has [+45/-45]2s as the layup. I got the following material properties for carbon/epoxy from the textbook "Engineering Mechanics of Composite Materials", by I.M. Daniel & O. Ishai, Longitudinal Modulus, E1=147Gpa...

Hi, I need to use a load deflection curve to determine the material properties of a elastic material. The stress strain is far from being linear. Any suggestions??

i need some information regarding following subject. Calculating mechanical properties of certain material(solid , Liquid, Plasma) form Hooke's Law of elasticity. σ = E¹ε + E²ε˙ + E³ε¨ Thanks