What is acceptable range of pressure in vacuum bagging resin infusion?

I need to know name of standards that provide allowed vaccum pressure in resin infusion.

02 March 2019 3,977 1 View

How to determine the delamination critical stress in sandwich panel with laminates skins upper and bottom?

I study the delamination of laminates upper and bottom skins of honeycomb composite structure simple supported from two sides and under bending stress. I consider the developed tension on the...

01 February 2019 4,107 2 View

What are the best mesh quality criterion for inspection element quality?

I know about mesh density, skewness, wrap angles, and aspect ratio. Per literature, aspect ratio is a quick tool to define quality of mesh. Is there a rule of thumb for acceptable values of...

01 February 2019 2,459 5 View

What is impact of elements overlapping on the accuracy of solutions?

In FE some elements are overlapping. I read a paper says thst such overlapping causes higher in plane stiffness only. I wonder does the impact on accuracy of solutions very big?

01 February 2019 9,872 7 View

What are the important features in acoustics emission signals?

I do some experiments in using AE method to detect events. I can plot a lot of figures such as hits, signal strength, waveform, counts, events so on. Which data shall I concentrate on? A little...

31 December 2018 6,615 10 View

How can I start implementing method of moving asymptotes?

I'm a little bit confused in regard of implementing MMA method. Should I transform the objective function into a Taylor series in order to use this method? Most of tutorials explain the...

31 December 2018 7,873 4 View

How can I get rid of elements overlapping in a knot for a finite element model??

I have developed a honeycomb sandwiched structure in Salome platform, meshed with netgen 2D, then calculated the compression stresses on it using Calculix open source FE. I tried to optimise the...

11 December 2018 921 1 View

What are the main considerations in injection mold designing and calculations?

I'd like to know the main parameters that should be considered in designing of injection mold. Also, I need to know a source for standardized calculations.

01 February 2018 616 4 View

How can I start learning Calculix coding?

05 June 2017 7,774 2 View

What are the sources of error in using an APDL Ansys code on two different versions with two nonsense solutions?

We have a code for a benchmark problem. We used this code in Ansys 14 and in Ansys 17. However, we get two different nonsense solutions. Further, we repeated running the code on Ansys 14 and it...

03 April 2017 1,547 3 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

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 calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

Could any one guide me, to write research proposal for grant? ?

We have one plant, the local people using this for controlling blood sugar, the toxicity and antidiabetic activity of the plant is not reported yet, please guide from whag should be the process ?...

02 March 2021 2,300 1 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View