How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How to reduce static electricity of powder after lyophilization?

I am working on synthesizing and then purifying peptides using the SPPS system. After purification of the peptide, the peptide powder is obtained using a freeze dryer. When measuring the powder,...

22 February 2021 10,099 5 View

What's the difference between 0.1% triton-X100 and ice-cold methanol in the immunofluorescence assay for intracellular protein staining?

Hi, Guys, I noticed that researchers usually permeabilized the cells with 0.1% Triton-X100 or ice-cold methanol (90%) for an intracellular protein staining, it looks like that the two methods work...

15 February 2021 5,606 4 View

What does this PZC data mean?

I measured different kinds of catalysts which were dispersed in DI water.I firstly added certain amount of HCl and then used NaOH to titrate and measure the pH value. What does this result mean?

27 December 2020 5,728 4 View

How to analyze a time series of temperature mean whether different or not?

I have 6 culture tank, 2 treatment with 3 replicate. I test temperature of every tank everyday, for 14 days. Now I want to compare whether this 2 treatment temperature have significant different...

06 December 2020 834 7 View

Species Transport in Porous Media cannot pass through?

I'm using ANSYS Fluent 2019 with Space claim, my problem is involving moisture diffusion (therefore using Species transport). I found that my h2o can never pass through the porous zone. I have...

09 October 2020 5,301 3 View

How to wash the LiF left by Ti3AlC2 etching?

I added 1 g Ti3AlC2 to 1g LiF and 20mL 9 M HCl and stirred it at 450 rpm at room temperature for 48 h.After deionized water washing and ultrasonic treatment, the product was obtained, but its XRD...

08 October 2020 7,612 4 View

What statistical tests can I perform on glycomics data collected from disease cohort across 3 timepoints?

I have a dataset comprising clinical characteristics and glycomics profiles of disease samples (n=100+) and matched healthy controls. So far, I have been able to do classification modeling to...

20 July 2020 2,153 3 View

How to set different moisture mass diffusivity for different material?

I'm modelling moisture diffusion into this Bi-material. Meaning one fluid diffuse into different 2 material (Pic below). Hence I would require to set different Mass Diffusivity & Porosity in this...

25 May 2020 528 3 View

Why not able to Import Pressure from FLUENT to Static Structural?

I'm currently doing a Modelling in Fluent (and Transient Thermal) and intend to Import Pressure Load to Static Structural. The Stress from Thermal Load was able to be imported but not from...

02 May 2020 2,910 3 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How relevant is Mini slump cone?

for all the rheology researchers, my question is, how relevant is a mini slump cone (smaller than a standard 50 cent rheometer). currently based on testing, the thickness of slumped material is...

26 February 2021 3,668 1 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

How to reduce residual stresses in MD simulation?

I am working on a preparation of representative polymeric structures of some popular polymers, such as polyimide or PTFE for MD simulation, during which a single nitrogen or oxygen atom will be...

24 February 2021 8,105 3 View

Suggestions for occupational stress surveys?

I am currently writing a masters thesis on reasons for occupational stress in the early childhood classroom, and want to include a short survey assessing participants work-related stress levels. I...

24 February 2021 8,678 2 View

The most suitable method to calculate the stress intensity factor in the presence of contact between the crack lips?

I'm trying to study cracked structures under a compressive load taking into account contact between the crack lips. I would like to know if the method of extrapolation by displacement remains...

21 February 2021 8,694 4 View

How to assign two different material/section properties in Abaqus(UMAT)?

Hi everyone, I am conducting a non-linear multi-layer pavement structure analysis which is a stress-dependent. So far, I am able to define the nonlinearity for one soil layer for its resilient...

11 February 2021 9,607 3 View

Are there any exception like work hardening in metals elastic limit due to dynamic loading?

The samples made out of spring steel are taken from same lot. The specimens were shaped following heating to forging temperature - Forming- Hardening -Tempering methods. After storage of almost 6...

11 February 2021 952 6 View

How to write cyclic loading in OpenSees?

Hi there, I'm having trouble with adding cyclic loading in OpenSees software. My task is to model a reinforcing bar under cyclic loading and compare the response with the experimental results....

04 February 2021 8,158 1 View