Effect of rock abrasivity (los Angeles abrasion test) on wear rate of the drill bit during rock drilling?

As I have conducted los Angeles abrasion test in the laboratory. Three type s of sandstone of varying UCS of Medium grained SS 13 MPa, fune grained SS 17.5 MPa and fine grained SS (pink) 51 MPa....

02 March 2019 7,298 5 View

I have 500 data set, Is it ok to split the in to 60% for training and 40% for testing?

As I have 500 data set in my work. I have split the data in to 60% for training and 40% for testing the data set in ANN. Is it ok to run the data set in NN. Pls give reason behind this so it help...

31 December 2018 7,001 1 View

What is the major application of temperature measurement during drilling?

If we have measured bit rock interface temperature using thermocouple during drilling. By embedded the thermocouple in the rock sample. Then what is the major application for industry,...

07 August 2018 9,646 11 View

Comparison wear rate between fine-grained sandstone and medium grained sandstone?

for fine-grained sandstone the wear rate is 10 mg/sec (temperature produce during drilling is around 128 dec. centigrade) and Medium-grained sandstone the wear rate is 6.66 mg/sec (temperature...

04 May 2018 6,315 0 View

How the wear rate behaves with respect to drill bit diameter?

if the diameter of the drill bit increases with the same spindle speed, wear rate will increase or decrease. give reasons.

03 April 2018 3,570 4 View

Can I cite the material drilling process parameters, in rock drilling process?

As I am doing my research work on rock drilling. In this area, research paper related to operational parameters are very less. Can I cite the material drilling process parameters. Because area and...

03 April 2018 279 3 View

When the drill bit diameter increases, specific energy is decreasing? what is the reason behind this?

drill bit diameter increases from smaller to bigger during drilling operation, mean while we have calculated the Specific energy. but when the drill bit diameter increases, specific energy...

02 March 2018 3,384 6 View

When drill bit diameter increases thrust also increasing?

As the drill bit diameter increases, thrust also increasing. What is major reason behind this. Why it is increasing and even for depth of drill also.

31 December 2017 7,900 4 View

What is the main reason when temperature increases during drilling with decreasing in specific energy?

During continues drilling operation, temperature goes on increases with decreasing in specific energy, what the main reason. What is the technical reason behind this.

11 December 2017 1,201 3 View

Application of temperature measurement during rock drilling in mining industries?

what is the major application (In Mining industry) of Experimental investigation to be carried out for rock core sample to measure the temperature during drilling operation. please give the the...

31 December 2016 4,529 0 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 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