Why the fabric strength in warp direction is better than weft direction?

During weaving, warp is the yarns that are being stressed to maintain the tension, there will definitely have residual stress in the yarns that are in the warp direction. This eventually results...

02 March 2018 7,597 1 View

What tenses should be used in the research paper and thesis? The most concern part is the literature review.

Chapter 1 is the introduction, so combination of present and past tense should be used. However, Chapter 2 is the literature review, should it be the past tense since they are those previous works...

07 August 2017 4,092 3 View

Is there any ASTM standard for flexural test of metallic alloys?

ASTM standard is required for the 3-point bending test of metallic materials. Thank you.

05 June 2017 7,690 5 View

Dear all, what is the difference between delamination and debonding in composite materials? Are they the same?

The definition of these two words are similar, which is the separation of two materials. Thank you.

02 March 2017 4,397 5 View

Can Rule-of-Mixture be applied to composite structure with different fibre orientation?

When we calculate the strength of composite using rule of mixture, fibre orientation is not taken into account, so is it a good method to obtain the properties of the composite?

09 October 2016 4,812 5 View

What is the difference between toughness and ductility of a material?

From my understanding, both of them refer to the ability to plastically deform without failure. Can any expert explain to me? Thank you very much

08 September 2016 2,750 95 View

Dear experts, can I know is there any method to differentiate the type of natural fibre? eg: flax fibre or hemp fibre ?

The structure of every natural fibre is similar. So, is there any experimental method or physical observation that can differentiate the type of fibre. Thank you very much.

07 August 2016 3,220 4 View

Good day everyone, I would like to ask whether composite with 45 degree fibre orientation has better fatigue life cycle compared to 90 degree?

03 April 2016 1,528 5 View

Good day everybody, can I know what is the minimum point required in S-N curve for metallic material? Thank you

I'm confusing whether 6 points are sufficient for S-N curve.

01 February 2016 1,390 14 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 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

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

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

Concrete compressive strength databases?

I am looking for datasets similar to this one: http://archive.ics.uci.edu/ml/datasets/Concrete+Compressive+Strength I am looking for concretes with different types of aggregates (Recycled,...

27 February 2021 6,801 3 View

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

How do you mesh a thin solid in Fluent?

Hello, I have used the shell function on SpaceClaim to create thin solids for the model I am studying. These are contained within an enclosure for my study. I chose this approach as it avoids the...

24 February 2021 8,856 3 View

No streamlines present in a small region inside a flow. This means exactly what?

No streamlines present means whether the flow is getting obstructed there and the velocity inside the region is zero? Or else, the fluid is trapped inside that region with a nonzero velocity?...

22 February 2021 5,249 10 View

What are effects of steel jacketing on flexural strength?

Dear all, If steel jacketing is used to retrofit a reinforced-concrete (RC) column, can we use it to improve flexural strength? I understand that we leave gaps between the ends of the jacket and...

22 February 2021 1,906 5 View