MTS 316 User Manual
316 Load Frame
Product Information
l
100-105-843 B
Copyright information © 2008 MTS Systems Corporation. All rights reserved.
Trademark information MTS is a registered trademark of MTS Systems Corporation.
Contact information MTS Systems Corporation
14000 Technology Drive
Eden Prairie, Minnesota 55344-2290 USA
Toll Free Phone: 800-328-2255 (within the U.S. or Canada)
Phone: 952-937-4000 (outside the U.S. or Canada)
Fax: 952-937-4515
E-mail: info@mts.com
http://www.mts.com
Publication information
Manual Part Number Publication Date
100-105-843 A
100-105-843 B
January 2003
April 2008
Contents
Introduction 5
Functional Description 6
Specification 9
Direct Shear Capability 11
Operation 13
Hydraulic Configurations 13
Specimen Mounting Considerations 14
Uniaxial Configuration 15
Installation of Hardware 15
Installation of spacers as required 16
Specimen installation 17
Specimen removal 18
Tri-axial Configuration 19
Installation of Hardware 19
Tri-axial Cell Initial Installation 22
Installation of the specimen into the triaxial cell 24
Specimen removal in the triaxial cell configuration 27
Direct Shear Configuration 28
Installation of Hardware 28
Installation of the Direct Shear hardware 29
Direct Shear Specimen Preparation 30
Direct Shear Specimen Insertion into the Test Space 31
Direct Shear Specimen Removal from Test Space 32
Test specimen removal from specimen box 33
Maintenance 35
Making Daily Inspections 35
Preventing Rust 36
Checking the Accumulators’ Precharge Pressures 37
Servicing the Actuator 38
Installation 39
Series 316 Load Frame Product Information
3
Unpacking and Inspection 39
Lifting and Moving Instructions 40
Installation of Load Frame 41
4
Series 316 Load Frame Product Information
Introduction
The MTS Series 316 Load Frame Assembly is used to apply axial loads to rock
or concrete specimens for unaxial compression, tension, and fracture mechanics
tests. The assembly consists of a fixed crosshead mounted on four columns,
which are bolted to the base plate, resulting in a rigid, yet freestanding frame.
The four-column design allows access to the test area from all four sides for easy
insertion and removal of a wide range of specimen sizes and fixtures. Plastic
curtains on three sides and a front door enclose the test area. The test area height
is adjusted by using spacer plates for uniaxial testing. The load frame itself rests
on a rigid table to provide a convenient working height.
When a triaxial cell is inserted into the test space, the Series 316 Load Frame
actuator applies axial stress to the specimen inside the triaxial cell. Alternatively,
a horizontal loading assembly that includes a horizontal actuator can be attached
to the axial load frame to provide a shearing load for direct shear tests. In this
configuration, the Series 316 Load Frame actuator applies the normal load.
The load frame assembly is available in four standard sizes based on load
capacity. Choosing a load frame depends on the strength and size of the material
being tested and the testing requirements.
Series 316 Load Frame Product Information Introduction
5
Functional Description
r
Model
632.94
r
Model
632.94
815-316-01_A
Functional Description
Series 316 Load Frames consist of four vertical columns that support a fixed
crosshead and fixed platen. A combination of the number of spacers and the
actuator stroke is used for adjusting the test space height.
6
Introduction
Series316 Load Frame configured for uniaxial compression testing
Series 316 Load Frames have the capability of testing specimens using a triaxial
cell as shown in the following illustration.
Series 316 Load Frame Product Information
Functional Description
815-316-09
m
Series 316 Load Frame configured for triaxial testing
Series 316 Load Frame Product Information Introduction
7
Functional Description
815-316-05
Series 316 Load Frames, when combined with a shear testing assembly, have the
capability of testing specimens in a direct shear mode, as shown in the following
illustration.
Series 316 Load Frame configured for direct shear testing
8
Introduction
Series 316 Load Frame Product Information
Specification
Specification
The Series 316 load frames are freestanding and the weight of the frames are
distributed adequately to prevent overload of most laboratory floors. Isolation
pads are provided with the load frames.
This table lists dimensions and weights of the standard 316 Load Frames.
316 Load Frame Specifications (part 1 of 2)
ERIES 316.01 SERIES 316.02 SERIES 316.03 SERIES 316.04
S
Actuator 243.40S 243.60S 243.70S 243.80S
Compression kN(kip) 496(111) 1013(227) 1459(328) 1984(446)
Tension kN(kip) 291(65) 648(145) 961(216) 1334(300)
Actuator Displacement
mm(in)s
Load Frame Spring Rate:
N/m 1.1x10^9 2.6x10^9 2.6x10^9 3.0x10^9
Lb/in 6.2x10^6 1.5x10^7 1.5x10^7 1.7x10^7
Parallel alignment Between
platens
100(4) 100(4) 100(4) 100(4)
0.051(0.002) 0.051(0.002) 0.051(0.002) 0.051(0.002)
Series 316 Load Frame Product Information Introduction
9
Specification
316 Load Frame Specifications (Continued) (part 2 of 2)
SERIES 316.01 SERIES 316.02 SERIES 316.03 SERIES 316.04
Force Measurement Load Cell Load Cell ΔP transducer ΔP transducer
Load Frame Height:
(Standard) mm(in) 1523(60) 1653(65) 1733(68) 1765(69)
(Table) mm(in) 609(24) 617(34) 617(34) 617(34)
Test Space mm(in) 736+/-50 (29+/-2) 735+/-50 (29+/-2) 735+/-50 (29+/-2) 730+/-50 (28.75+/-2)
Floor Loading Length mm
(in)
Floor Loading Depth mm (in) 686(27) 762(30) 762(30) 762(30)
Approx. Load Frame Weight
Kg (lbs)
Floor Loading
kg/m2 (psi)
940(37) 1118(44) 1118(44) 1118(44)
2512 (5540) 3266 (7200) 3400 (7500) 3855 (8500)
3895 (5.6) 3834 (5.5) 3991 (5.7) 4525 (6.5)
10
Introduction
Series 316 Load Frame Product Information
Direct Shear Capability
Refer to the assembly drawings typically found on teh system reference manual
CD for additional information.
P
ARAMETER SPECIFICATION
Specification
Actuator
Tension kN (lbs) 162 (36.4)
Compression kN (lbs) 254 (57.0)
Actuator Displacement mm (in) 100(4.0)
Force Measurement Load Cell
Specimen Dimension
Diameter mm (in) 150 (5.90)
Length mm (in) 300 (11.82)
Gap mm (in) 20 (0.79)
Floor Loading Length mm (in) 1365(54)
Floor Loading Width mm (in) 760 (30)
Approximate Frame Weight
Kg (lbs) 2425 (1100)
* For additional information, refer to the Series 243 Hydraulic
Actuator Product Information Manual; part number 011774800
243.20
*
Series 316 Load Frame Product Information Introduction
11
Specification
12
Introduction
Series 316 Load Frame Product Information
Operation
Procedures in this section assume the operator is familiar with all operating
aspects of the system electrical controller and interlock restrictions that apply to
starting the hydraulic power supply.
The operation instructions for the Series 316 Load Frame include specimen
mounting for Uni-axial and Direct Shear configurations. The instructions also
describe insertion of MTS Model 656 Tri-axial cells. Please see the appropriate
Tri-axial instruction manual for specimen preparation and insertion inside the triaxial cell.
Hydraulic Configurations
Series 316 Load Frames are provided with hydraulic service manifolds for
control of hydraulic pressure. Systems configured for direct shear applications
are provided with a Model 293 hydraulic service manifold for control of
hydraulic pressure to the axial and direct shear actuators; refer the the 293.1x
Hydraulic Service Manifold Product Information, part number 015081000, for
additional information.
Hydraulic Configurations
Attached to the return pressure lines is a dump solenoid that will direct returnline hydraulic pressure to the drain line following shutdown. Shutdown without
a dump solenoid would cause the actuators to slowly drift because the actuators
have unequal area pistons.
Series 316 Load Frame Product Information Operation
13
Specimen Mounting Considerations
Specimen Mounting Considerations
Specimen mounting is the most critical and potentially hazardous step in system
operation. Improper operation of the load frame during specimen installation or
testing can cause damage to equipment or specimens. Observe the following
precautions when installing a specimen.
• Configure the test program to reduce the possibility of specimen buckling
both during the test and at specimen failure. Buckling can cause damaging
side loads to be applied to the load cell.
• If the specimen will be tested in both tension and compression, reduce
backlash to a minimum. This will reduce the possibility of data being
invalidated by fixture or specimen shifting.
14
Operation
Series 316 Load Frame Product Information
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