Lin Feng Ng

7 Questions 14 Answers 0 Followers

Questions related from Lin Feng Ng

Dear all, I would like to know what is the function of alcohol in the fibre treatment using 3-aminopropyltriethoxysilane?

Is it necessary to use alcohol in the silane treatment for natural fibres? OR we can just use the distilled water only without mixing with alcohol? Thank you.

18 June 2018 3,289 6 View

Does fatigue/endurance limit exist for fibre reinforced polymer composite material? Is pseudo-endurance limit a standard way used in fatigue analysis?

Endurance limit only exist for steel. Can endurance limit be applied for composite materials also?

13 February 2017 7,954 3 View

What is the relationship between surface energy, contact angle and fibre-matrix interfacial bonding?

Does roughness of fibre influences the surface energy and contact angle? Chemical treatment can improve the surface energy but causes the increase in the hydrophilic characteristic of fibre?

30 October 2016 7,582 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?

As I know, fibre orientation with 90 degree can allow better load transmission, so fibre orientation with 90 degree should have better fatigue life cycle. comparison in terms of percent of...

09 April 2016 7,786 6 View

Good day everybody, Can I know how to plot the average stress-strain curve?

normally we'll do 3 times tensile test to obtain the average value but the rate of elongation is different for the 3 specimens. Eg: Strain value at UTS for the first sample is 0.2mm/mm but second...

21 February 2016 3,797 4 View

Should we use yield strength or ultimate tensile strength in fatigue test for metallic material? What is the minimum load level we need to use?

TU Delft

19 January 2016 6,057 3 View

Is the amount of ethanol/water solution important for silane treatment if the concentration of the silane is based on the fibre weight?

The concentration of silane was fixed as the weight of silane relative to weight of fibres. Eg: In 5 wt% of silane solution, the 0.5 g of silane was dissolved in the ethanol/water solution for 10...

01 January 1970 2,201 3 View