Recent content by Galbi
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Undergrad Water evaporation by negative pressure and 0% of RH
Wow this is tough. I'll keep studying about it. Thank you very much. -
Undergrad Water evaporation by negative pressure and 0% of RH
The air of each container should be refreshed by air from outside. However, I don't know the flow rate. Could you suppose each container has the same air flow? -
Undergrad Water evaporation by negative pressure and 0% of RH
Greetings! I'm trying to evaporate water in some samples. I'm trying 3 methods. Baking samples with 100°C, normal air pressure, and normal RH. Put the samples in 0% RH, 23°C, and normal air pressure. Put the samples in container of -15 psi air pressure, 23°C, and normal RH. The total amounts... -
Where can I find some small particle materials?
Could you tell me at least the search words? It's hard for me to find the company in US. I think wood is not proper material because it is not homogeneous. I'm sorry about misplacing this thread on wrong section :)- Galbi
- Post #3
- Forum: Mechanical Engineering
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Where can I find some small particle materials?
Hello, I'm looking for small particle material. Please see a picture above. The left one is box shape and the other one is sphere shape. But the diameter of the sphere is very small like something around 20~100 μm. Both are made of same material of which modulus is over 20 GPa and both are...- Galbi
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- Materials Particle
- Replies: 7
- Forum: Mechanical Engineering
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Why need 4th order stiffness tensor expression?
Thank you very much!- Galbi
- Post #3
- Forum: Introductory Physics Homework Help
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Why need 4th order stiffness tensor expression?
OK. First of all, I'm novice at Physics so this question may be weird. Above, there are 2 expressions for strain-stress relations. Let's assume that all components in the matrix are variables, not zero, not E, nor not G in the first picture. The first one is written in 2D matrix form, whereas...- Galbi
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- Expression Stiffness Tensor
- Replies: 2
- Forum: Introductory Physics Homework Help
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How can I calculate the inverse of a 4th order tensor?
Dear jambaugh, It works! Thank you very much!- Galbi
- Post #4
- Forum: Calculus and Beyond Homework Help
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How can I calculate the inverse of a 4th order tensor?
Thank you very much. Since I'm a novice at tensor calculation, It's hard to understand what you're saying. If I have 3x3x3x3 tensors, then do the components of inversion of the matrix as seen below correspond to the components of inverse of A ? A=\left[\begin{array}{cccc} A_{1111} & A_{1112}...- Galbi
- Post #3
- Forum: Calculus and Beyond Homework Help
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How can I calculate the inverse of a 4th order tensor?
Homework Statement I'm looking for how to calculate inverse of the 4th order tensor. That is, [FONT=Times New Roman]A:A-1=A-1:A=I(4) If I know a fourth order tensor [FONT=Times New Roman]A, then how can I calculate [FONT=Times New Roman]A-1 ? Let's just say it is inversible. Homework...- Galbi
- Thread
- Inverse Tensor
- Replies: 5
- Forum: Calculus and Beyond Homework Help