Direct Shear Test

Product

The  Direct Shear Apparatus  utilizes a square or a circular  shear box, which is divided into two halves horizontally. This shear box contains the specimen, which is subjected to a constant normal load, while an increasing horizontal force is applied to one of the sections of the shear box.This force causes the specimen to shear along the plane separating the two halves. By subjecting a number of  specimens  to  different  normal  loads,  a  relationship  between shearing strength and vertical stress can be established. The hand operated and motorised machines have been designed for easy handling and continuous use.

LM17229

 

LM17229 : DIRECT  SHEAR  APPARATUS  (HAND OPERATED)

Conforms to I S : 2720 (Part - 13).
This comprises of :
A shear box assembly 60 mm. square, supplied with two porous plates,  two  solid  grid  plates,  two  perforated  grid  plates,  one retaining plate and one loading pad, complete with a shear box housing and ball roller strips. Loading unit normal stress capacity is 3 kg./cm   (on a 60 mm. square specimen) complete with lever loading fixture. Specimen cutter for a specimen size 60 mm. x 60 mm. x 25 mm. high.   Set of weights as follows, to give a normal stress of 3 kg./cm through lever arrangements; 4 x 0.05, kg./cm , 1 x  0.1 kg./cm , 1 x 0.2 kg./cm , 3 x 0.5 kg./cm , 1x1.0kg./cm . Supplied without proving ring and dial gauges.

ESSENTIAL

LM17142  : Proving  ring  2 kN capacity.
LM173494 : Dial gauge 0.01 mm.  x 25 mm. travel.

SPARES

LM172291 : Set of porous stones.
LM172292 : Set of solid grid plates.
LM172293 : Set of perforated grid plates.
LM172294 : Specimen cutter as specified.

 
 
   

LM17230  : DIRECT  SHEAR  APPARATUS  (MOTORISED)

Similar to  LM17229, except that the motorised unit provides a single strain rate of  1.25 mm./min.
Wired for 230V., sph. 50 Hz.

   

LM17231

 

  LM17231 : DIRECT  SHEAR  APPARATUS  (MOTORISED)

Similar to LM17229, except that the motorised unit provides strain rates of 1.25, 0.625, 0.25, 0.125, 0.05, 0.025,0.01, 0.005, 0.002, 0.001, 0.0004 and 0.0002 mm./min.
Wired for 230V  sph. 50 Hz.

 

LM17232

 

 

LM17232 : LARGE DIRECT SHEAR APPARATUS - 50 kN (MOTORISED)

For 30 cm. square x 15 cm. high specimen, having 72 rates of strain   ranging   from   0.0014   mm./min.   to   10.16   mm./min.   It comprises of a loading unit of normal stress capacity of 5kg./cm (on a 300 mm. square specimen) for a maximum shear load of  50kN. Complete with lever loading fixture, shear box assembly 300 mm. square, supplied with two porous plates, two solid grid plates, two perforated grid plates, one retaining or base plate and one loading pad complete with shear box housing  and ball roller strips. A set of weights to give a normal stress of 5 kg./cm  through a lever system.
Wired for 230V., sph. 50 Hz.

 

LM1723001

Transducers

 

LM1723001 : DIGITAL READOUT  KIT  FOR  DIRECT SHEAR

The unit consist of :
3 Channels digital indicator
Display     :  6 digits, 12.5 mm. heights, 7 Segments red L.E.D.
Tare         :  Facitlities for individual channels.
Peak hold :  Facitlities for individual channels.
Input         :  Channel 01   Load cell
                 :  Channel 02   Displacement Transducer
                 :  Channel 03   Displacement Transducer

Specifications :

Load cell 2 kN, resolution 0.01kN.
Displacement Transducer    19.99 mm. , resolution 0.01mm.
Output  : RS 232 Serial port.
Wired for 230V., sph. 50 Hz.

 
 
   

LM1723002 : ‘LYNX’ 8 - CHANNEL  DATA  LOGGER

Similar to LM1723001, except that the digital readout kit is replaced with a Data Logger, as LM1711002.

   

LM1723003 : SOFTWARE  FOR  DIRECT  DATA  SHEAR PROGRAM
The software plots shear stress against normal stress.The failure envelope and shear strength parameters are accurately obtained. Also, plots stress vs strain for both horizontal and vertical displacement.

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