Material Definition and 1000 Threads

I am into photonics research, and have been searching about this topic in vain, but almost nothing from Google shows up. So i turned here for some light. Do you guys know any material that changes its transparency when a laser (or light) illuminates from its side?

Hello Everyone, Can someone pleas help me to find out the equivalent material for the EN39B steel in Chinese (GB) standard. I found other equivalents AS X9315 / EN39B Germany DIN: 15NiCrMo16-5 Great Britain 835M15 or 835H15 Japan SNCM 815, JIS G 4103 USA EN: 39B but its little bit difficult to...

I read in some article that we have material from pigs too. 1) Is that possible? Can pigs and monkeys breed? 2) Is there any possibility "someone" in a far away past crossbreed-ed genetic material of both apes and pigs? Are we a hybrid?

I'm building a trike and wanted to know if an acrylic shaft would suffice? The accumulator shaft would hold two cycle ratchet and a sprocket.

Approximately, what is the total mass of these materials that is contained in a "typical" Gen III or III+ PWR (e.g., EPR, AP1000...)? 1/ Zr alloy (fuel cladding and other assembly components)? 2/ Ag-In-Cd alloy (control rods)? 3/ Gd (burnable neutron absorber)? 4/ Ni-based alloys? 5/ Stainless...

Any suggestions about a material that has more expanding properties when exposed to moisture than Super Absorbant Polymers? Or binary materials...IE...when mixed together and then moistened have a greater expansion capability than SAP's? Thanks

Hi there, I have physics questions. if someone can help me . Thanks a lot!

I am looking for group of material that behaves according to the following: (1) When a certain laser light passes perpendicular to the surface of the material it enters and exits unimpeded (2) However, when another laser light (with direction parallel to the surface) enters the material, the...

Viscoelasticity is a property of a material that exibits both viscous and elastic properties.. When under load,within elastic limit,steel offers resistance to deformation (viscous) and regains shape after removal of load..So is it right to say steel is VISCOELASTIC in elastic limit?

Hello! I've been researching hygroscopic materials and evaporation rate a bit lately, and a question has struck me which I haven't found an answer to yet: What material factors affect the rate of evaporation? Is it possible to engineer a material which is hygroscopic (absorbs water) in humid...

hello are there software to design alloys in silico or other materials and see how they would perform? thanks!

Hello! I'm looking for a substance that can: (1) be turned into a flexible material (e.g., a flexible plastic), (2) is dissolveable in rubbing alcohol but not water (or blood), and (3) safe for a medical procedure ... And, if possible, preferably biodegradable... I know that's kind of a...

In classical mechanics, to raise from some height h_{0} to infinity over a gravitational body, takes a certain amount of energy, the energy associated with escape velocity, let's just call it ε. ε = \lim_{t\rightarrow +\infty} \int_{h_{0}}^t ƒ(h)dh Likewise, it's time-reversible, so dropping...

That's the question. When I ask that I'm talking about science books, most importantly, Mathematics and Physics. My aim is to avoid taking notes, I think it would be a waste of time if there are summarized books out there. For example, there could be summarized books written for refreshing...

Homework Statement You have a new unknown material. You want to get a rough approximation as to the location of the unknown material on the electrostatic series. You only have two tools at your disposal; some wax and a charge detector. Design an experiment (procedure) that will help you...

Hello dear friends, I have recently found a material that will be really interesting for its tribological properties (for my master thesis)... in the mall ! It is used in Samsung kitchen ovens : some kind of a joint to hold the cavity separator (a plate that divides the oven cavity in 2)...

Good morning, I was wondering if you could help me solve a problem with a poroelastic model with COMSOL Multiphysics. It is a very simple model preliminary to my real study to understand the role of Poisson's ratio on the simulation, keeping all other parameters constant. The model is a...

Homework Statement The following coil-wound core (core length = L , Gap length = lg, cross- sectional area = A , core permeability = only hysteresis graph is given, N = N turns) is driven by a Voltage source, is known that the current in the coil is 60hz AC. Determine...

At M.V. (10.5KV), what is the difference in material between 1250A, 40KA busbar & 1250A, 50KA?

Does anyone know where I can find some material (for free) on IDL? I'm new to programming, and I would like to teach myself this language. I would like suggestions to material that is "novice" friendly.

I'm working on an engineering problem where we are using Teflon as a low-friction material as a surface for plastic parts to move above. However, the material is wearing faster than expected due to the plastic rubbing away at the Teflon. Is there a non-metallic material that has equal or...

Hi, As far as I know, every material has different sets of natural frequencies associated with it. For example, A simple one dimensional oscillator with stiffness "k" and mass "m" has a formula for calculating its natural frequency = 1/2pie*squareroot(k/m). I was wondering if there are...

Hi, I'm looking for a shape memory material with this features: - return to his original shape by electric hit or by folding manual - flexibility - strong enough to swipe another flex material. Thank you.

I am working with a set of alloys that must first be ground up in a ball mill at cryogenic temperatures. It is important that no contamination makes it into the material and careful steps are taken to ensure this end. Unfortunately when we ran a set of samples through our RBS lab and then again...

my friends, i am struggling wit the identifying of my material.My material is the spring of the suspension of bicycle,material is steel but how .I am sending some photos ,please help me this is my final project

I am interested in locating a material that can withstand a strong alkaline medium (10 M KOH) and approx. 5 atm pressure... I am somewhat new to material chemistry so all I have been able to think of thus far is PVC pipe. Through my research I have discovered that PVC is highly fire retardant...

Hi all again, I started a post earlier and it was buried somewhere by now. I really need more input and information and hope you all can help. How are admission process different, CM vs MS&E? CM belongs to Physics department while MS&E is usually on the engineering side. I got my Physics...

Good evening. I'de like to know if exists a material light, cheap and strong as wood material, capable of handle maximum 100 pounds. . that's for a portable massage table structure.

Hello As you know AlGaAs and GaAs have different band gap).I want to know what will happen when we connect both of them to each other? In this figure I don't know how can we draw the jump in their junction. Could you tell me what does fermi level do? Thanks

OK, this is embarrassing, but I never looked carefully at this elementary point. We say that if p implies q P is the set of all things for which p is true Q is the set of all things for which q is true then Q ⊆ P. Also that the set of all things for which p&q is true equals P∩Q But p & q...

I am a part C Mechanical Engineering student and have been undertaking a project investigating the strain sensitivity of a particular glass filled composite. From my quasi-static results, the stress-strain curves seem to be reasonable and match that of the mechanical material properties...

I am a part C mechanical engineering student and require some advice for my individual project, which is based on the high strain-rate testing of a particular glass filled composite material using a split-Hopkinson pressure bar (SHPB) experiment. I gathered the results on a SHPB test rig and...

I am working on a project for which we have to design a Light weight tricycle. I want to know the procedure for selecting a light weight material for the chassis, which has good stiffness, economically available and good weld ability. We also have no constraints on the cross section of the pipes...

I want to create stress/strain curves for Higher Strain Rates from an available stress/strain curve? I am interested on the mathematical formulation aspect to generate a Dyna Material card.

When an external magnetic field is applied to a diamagnetic materials, their atomic current loops will tend to align in such a way as to oppose the applied field. Diamagnetism is the residual magnetic behavior when materials are neither paramagnetic nor ferromagnetic and most materials are...

I have heard that AntiMatter is the costliest material on Earth costing around $62 trillion per gram. How true is that and why? Who calculated this? What does antimatter do? Please shed some light. Thanks!

Hi guys, So, I'm a high school senior about to graduate, and because of reasons, I most likely will not be attending a college next year. However, I will apply to colleges next year for a Physics major. In the meantime, I would like to use my time wisely, and I was thinking that the smart thing...

Dear All, 1) I am not able to understand the statement given by one of the professor. i,e., Number of primitive cells in a material = Number of K-States. 2) Additionally, if one atom is per primitive cell then why do we have NUMBER of k-states equivalent to number of atoms in this case ? 3)...

Hello, I am confused with casting grades of different steel,for example 316 SS has casting grade CF8M. What does it mean and where can i find grades of other materials as well like 316L, 304L. 304, CS, etc. Any data sheet showing grades for every material will be helpful. Thanks

Hi guys, I'm having trouble with this book - "Introduction to Probability and Statistics for Engineers and Scientists" by Sheldon M. Ross. The explanations are very short and often lack necessary details, the examples are very hard and apparently some full of errors. I just can't study from it...

I am looking for a material that I can bend easily into different desired shape frequently without breaking or losing strength. The material can either be elastic or not elastic. I know sheet spring can do but if I bend it like 70 to 80 degrees will it permanently deformed or become fatique...

Hi, I've learned that material derivative is equal to local derivative + convective derivative, but can't seem to find out which way the convective derivative acts, like for example in velocity fields: The equation my teacher gave us was (with a and v all/both vectors): Acceleration = material...

Hello, I would need help. Need help choosing the material for sealing: o-ring, shaft seal. They will use the equipment that will be installed on board a seagoing ship. The conditions are: - Resistant to seawater - Withstand temperatures of -32 ° to + 60 ° or -25 ° to + 60 ° - And chemical...

Hi. I am using Material Studio (MS) version 4.3 (yeah I know it's old but that's all I've got) and I have been trying to calculate this energy of a specific compound (N,N-dimethylformamide). I've learned that there are 3 ways on how to calculate energy using MS; Forcite, Dmol3 and Minimizer...

So i have been given a practical for a non-hookean material i.e. polymer, we were to add weights progressively and then taking them off one by one. After doing so i plotted the weight attached to the polymer vs the length stretched for both adding and removing the weights on the same graph. The...

I have measured the conductivity of a 2D material. I want to use σ=N⋅e⋅μ to find the mobility μ=σ/(N⋅e). https://en.wikipedia.org/wiki/Electron_mobility#Relation_to_conductivity I have measured N using a spectroscopic/imaging technique to get a Surface Density with units [cm^-2]. Mobility...

Homework Statement A certain material is kept at very low temperature. It is observed that when photons with energies between 0.23 eV and 0.85 eV strike the material, only photons of 0.37 eV and 0.64 eV are absorbed. Next the material is warmed up so that it starts to emit photons. When it has...

Two liquids, A and B, are mixed together. A is 5.00% solids, the rest water. B is 11.0% solids, the rest water. To the mixture is added 18.5 kg of bone-dry solids resulting in a mixture of 2 150 kg containing 8.25% solids. What were the original amounts of the liquids A and B?

It is my understanding that a photon is absorbed when the photon's energy is sufficient to excite an electron into a higher energy state. So if I shine a light unto a light absorbing material, let's say a thin black metal, then why the surface never reaches a saturated state? I mean, if we...

Hello all, whether the Refractive index of piezoelectric materials (Example: Polyvinylidene fluoride-PVDF ) changes by the application of pressure, strain or force ?