316 Load Frame Product Information 100-105-843 B l
Copyright information Trademark information Contact information Publication information © 2008 MTS Systems Corporation. All rights reserved. MTS is a registered trademark of MTS Systems Corporation. 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.
Contents Introduction 5 Functional Description Specification 6 9 Direct Shear Capability 11 Operation 13 Hydraulic Configurations 13 Specimen Mounting Considerations Uniaxial Configuration 14 15 Installation of Hardware 15 Installation of spacers as required Specimen installation Specimen removal 18 Tri-axial Configuration 19 16 17 Installation of Hardware 19 Tri-axial Cell Initial Installation 22 Installation of the specimen into the triaxial cell 24 Specimen removal in the triaxial
Unpacking and Inspection 39 Lifting and Moving Instructions Installation of Load Frame 4 40 41 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.
Functional Description 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. r Model 632.94 r Model 632.94 815-316-01_A 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.
Functional Description m 815-316-09 Series 316 Load Frame configured for triaxial testing Series 316 Load Frame Product Information Introduction 7
Functional Description 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.
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) SERIES 316.01 SERIES 316.02 SERIES 316.03 SERIES 316.04 Actuator 243.40S 243.60S 243.70S 243.
Specification 316 Load Frame Specifications (Continued) (part 2 of 2) SERIES 316.01 SERIES 316.02 Load Cell Load Cell ΔP transducer ΔP transducer (Standard) mm(in) 1523(60) 1653(65) 1733(68) 1765(69) (Table) mm(in) 609(24) 617(34) 617(34) 617(34) 736+/-50 (29+/-2) 735+/-50 (29+/-2) 735+/-50 (29+/-2) 730+/-50 (28.75+/-2) Floor Loading Length mm (in) 940(37) 1118(44) 1118(44) 1118(44) Floor Loading Depth mm (in) 686(27) 762(30) 762(30) 762(30) Approx.
Specification Direct Shear Capability Refer to the assembly drawings typically found on teh system reference manual CD for additional information. PARAMETER SPECIFICATION Actuator 243.20* 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.
Specification 12 Introduction Series 316 Load Frame Product Information
Hydraulic Configurations 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.
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. 14 Operation • Configure the test program to reduce the possibility of specimen buckling both during the test and at specimen failure.
Uniaxial Configuration Uniaxial Configuration Installation of Hardware If not already installed, attach the square loading block to the base of the frame. Shown with crosshead removed Note Torque the bolts per the specifications on the load frame assembly drawing for full tension capability of the system. Compression testing conditions do not require this torque setting.
Uniaxial Configuration Installation of spacers as required Install the appropriate number of spacers for the test to be conducted. When determining the number of spacers needed, it is best to extend the actuator to a position that leaves just enough stroke for the expected testing needs. This actuator position helps reduce the risk of damage to the specimen or fixtures due to actuator over-travel. Compression Indirect Tension Typical steps for determining load train components: 1.
Uniaxial Configuration Specimen installation 1. Turn the hydraulic service manifold (HSM) off. 2. Insert the specimen into the test space. Attach extensometers to the specimen, with the zero pins in place. 3. Attach any electrical cabling for the load cell and extensometers. 4. Remove the zero pins from the extensometers and zero offset the transducer signals. For additional information see the TestStar Operations Manual. 5. Close the front door of the load frame.
Uniaxial Configuration Specimen removal 1. When the test is complete or the specimen is to be removed from the test space, change the servo control mode to stroke control and retract the actuator. 2. Turn the hydraulic service manifold (HSM) off. 3. Open the front door of the frame. 4. Remove the extensometers from the specimen, and insert the zero pins. The zero pins help protect the extensometers from inadvertent over-travel. 5. Remove the specimen.
Tri-axial Configuration Tri-axial Configuration Shown with optional lift 316 Load Frame with Closed Triaxial Cell Installation of Hardware 1. Remove any spacer plates that may have been used in the uniaxial or direct shear test configurations 2. Remove the uniaxial load cell. 3. Install the square loading plate on the base of the frame if it is not already installed.
Tri-axial Configuration Note Torque the bolts per the specifications on the drawing for full tension capability of the system. Compression testing conditions do not require this torque setting. The bolts should however be tightened to a level to prevent mechanical backlash when conducting through-zero tests (tension/compression/tension). 4. Install positive stops, quantity 2.
Tri-axial Configuration 5. Install locating block for the triaxial cell.
Tri-axial Configuration Tri-axial Cell Initial Installation 1. Position the vessel-mounting table on the slides that extend out from the front of the load frame test space.
Tri-axial Configuration 2. The loading bolts should be tightened to hold the bell of the tri-axial cell to the tri-axial cell base. 3. Using the crane, lift and place the triaxial cell onto the vessel-mounting table. 4. Disconnect the crane from the tri-axial cell.
Tri-axial Configuration Installation of the specimen into the triaxial cell Note It is assumed that the actuator has been retracted to allow adequate room to insert the triaxial cell into the test space. Shown with optional lift 316 Load Frame with Open Triaxial Cell 1. Use spring loaded retention pins to hold the triaxial cell locating plate to horizontal slides. 2. Attach the lifting crane to the triaxial cell. 3.
Tri-axial Configuration 6. After the specimen has been installed and all internal electrical connections have been made, turn the crane handle counter-clockwise to lower the bell of the tri-axial cell onto the base plate using the locating pins as guides. 7. Disconnect the crane from the triaxial cell. 8. Connect the tri-axial cell bell to the base plate. 9. Slide the triaxial cell into the test space until it comes to rest against the positive stops. 10. Attach the locating stop to the base of the frame.
Tri-axial Configuration 13. Close the front door of the load frame. 14. Turn the hydraulic service manifold (HSM) on with the actuator in stroke control. 15. Switch to load control and extend the actuator so that the actuator touches the upper pushrod of the triaxial cell. 16. Turn the HSM off. 17. Open the door and attach the pushrod to the actuator rod with bolts. 18.
Tri-axial Configuration Specimen removal in the triaxial cell configuration 1. When the test is complete, turn the HSM off. 2. Open the door and remove the bolts attaching the triaxial cell pushrod to the actuator rod. 3. Close the door, turn the HSM on and retract the actuator. 4. Turn the HSM off. 5. Drain the confining fluid out of the triaxial cell. 6. Disconnect the confining and pore pressure lines. 7. Disconnect the transducer ID and system transducer cabling. 8.
Direct Shear Configuration Direct Shear Configuration Installation of Hardware 1. Remove any spacer plates that may have been used in the uniaxial and triaxial configurations. 2. Remove the uniaxial load cell. 3. Install the axial load cell used with the direct shear testing configuration. Note Use spanner wrenches to preload the mechanical joint. 4. Optional: Remove restraint blocks on the axial spherical seat 5. Remove square loading plate on the base of the frame. 6.
Direct Shear Configuration Installation of the Direct Shear hardware Note The upper and lower portions of the direct shear specimen box may be attached with handles. Do not remove the handles until the direct shear system is installed in the test space and the upper portion of the fixture is attached to the actuator rod. 1. Remove the locating pin on the direct shear hardware and push the assembly into test space. 2. Insert the locating pin into the forward locating hole. 3.
Direct Shear Configuration Direct Shear Specimen Preparation 1. Locate the two specimen shear boxes. 2. Place the lower shear box on a clean, flat surface. Use a sealant such as modeling clay to seal around the inside edges of the box to prevent leakage of the filler. Typical filler material is Hydro-stone plaster. Hydro-stone uses a weight mix ratio of 32/100 (water/plaster), or a mixture of 0.326 liters of water per kilogram of Hydro-stone. Note Water weighs approximately 0.98 kg/liter (8 lbs/gallon).
Direct Shear Configuration Direct Shear Specimen Insertion into the Test Space Note It is assume that system is in a safe operating condition. 1. Attach the crane to lifting eyes on the upper direct shear box with a lifting strap. 2. Open the front door of the load frame. Place the nylon spacer on top of the triaxial cell vessel-mounting table. 3. Using the crane place the direct shear box assembly on the nylon spacer of the loading plate. Disconnect the crane from the direct shear boxes. 4.
Direct Shear Configuration Direct Shear Specimen Removal from Test Space 1. Change control modes so that the axial and direct shear actuators are in stroke control. 2. Attach the upper specimen box to the spherical seat using two lifting bolts. 3. Using the axial actuator, position the specimen boxes appropriately to attach the front handles to the specimen boxes, and attach the front handles. 4. Turn the axial and direct shear HSM off. 5. Open the front door of the load frame. 6.
Direct Shear Configuration Test specimen removal from specimen box Removing grout (filler) material from the specimen boxes using a mallet to break up the grout. Some disassembly of the specimen box may be required to remove all the grout.
Direct Shear Configuration 34 Operation Series 316 Load Frame Product Information
Making Daily Inspections Maintenance Making Daily Inspections Before the start of each day’s testing, do a quick inspection of your load frame. Following are typical items that should be checked daily: • Ensure that there are no leaks from the hydraulic lifts or locks. • Ensure that there are no leaks from the actuator, hydraulic service manifold, servovalve, or accumulators. • Ensure that electrical connections are tight, with no frayed or poorly routed cables.
Preventing Rust Preventing Rust The operating environment determines how often you take rust prevention measures. Humid and corrosive environments require more prevention. Recommended supplies: • #1 grade kerosene • Silicone spray • 000 emery cloth • Touchup paint; MTS part numbers 011-059-854 (beige), 011-059-856 (gray), 044-587-501 (brown) • Metal primer paint • Lint-free cloths Unpainted surfaces: Spray with silicone, and then wipe with a clean, lint-free cloth.
Checking the Accumulators’ Precharge Pressures Checking the Accumulators’ Precharge Pressures Check pressure at least once a month; more often as required by operating conditions. An accumulators’ correct precharge pressure is written on its label. See the Series 111 Accumulator Product Information manual (part number 011553304) for the complete details on checking the precharge intervals and servicing the accumulators. Record both the pressures and the room temperature in a logbook.
Servicing the Actuator Servicing the Actuator If the actuator begins leaking hydraulic fluid or its performance becomes poor, it should be serviced by a qualified service technician. WARNING The hydraulic blocking valves will cause system pressure to be trapped in actuator that can cause unexpected actuator rod movement. Unexpected actuator rod movement can result in personal injury and equipment damage.
Unpacking and Inspection Installation This section provides installation instructions for Series 316 Load Frame. MTS System Corporation recommends that the procedures in the following subsections be performed in the order given or referenced to minimize the chance of damage to equipment or injury to personnel.
Lifting and Moving Instructions Lifting and Moving Instructions This subsection provides a procedure for lifting and moving the load frame. WARNING Improper lifting or transportation of the device can result in damage to equipment or injury to personnel. Read and comply with the following instructions and refer to the Lifting and Moving Instructions booklet attached to the load frame. 1. Ensure all devices involved in lifting and moving the load frame are in good working order.
Installation of Load Frame Installation of Load Frame 1. Move the load frame to the desired location. Location requirements of the load frame are based primarily upon size, weight, and hydraulic requirements. Floor structure should be checked to ensure that the weigh of the load frame could be supported. Ensure safe and adequate access space in all directions around the load frame. Ensure safe and adequate lighting.
Installation of Load Frame 42 Installation Series 316 Load Frame Product Information
m 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.
