The elastic analysis method was developed during this study and is based on an assumption of linear elastic behavior of a statically loaded specimen. Also, you can type in a page number and press Enter to go directly to that page in the book. Rocking tendency is checked by applying light pressure near the approximate vertical diametral plane on the top of the specimen near the front and back faces. Device Description’ The device has two brass arms fitted perpendicular to each other. The horizontal lines are precision-etched so A-8 Cl c:
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Position the mounting blocks in He groove one by one and hold them tight along the bottom and the side opposite to the one having holes in the brass channel. Additional notation employed is described where it appears. The back plate is Men brought close to the specimen and screwed in place. Declarations of Interests by Members in items on the Agenda for this meeting. Deflections in the horizontal diametral plane were measured using both mountable and stand-alone measurement devices extensometers and EVDTs.
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The Fund Strategic Statement. The guide posts are in line with the loading strips hence assuring minimal lateral movement of the top loading strip with reference to ns lower.
Once Mat is accomplished, the thumbscrews are unscrewed which pulls the extensometer assembly on to vdr specimen in the horizontal diametral plane. Remove the alignment device by vertically lifting it over the sample. A high degree of freedom exists in the Retsina device, and hence it is more liable to equipment and operator errors.
Date of next meeting The next meeting of the Committee will be held on Friday vre November at Based on feedback from you, our users, we’ve made some improvements that make it easier than ever to read thousands of publications on our website. During these items the meeting is likely NOT to be open to the press and public. This device uses a fixed bottom loading strip with an independent loading strip that is placed on the top of the specimen.
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The MTS device is simple in design. To insure Mat the longitudinal center line of the loading strips remain in the vertical diametral plane of the test specimen throughout the testing, an alignment bar is connected to one vef of the upper loading platen. Marking Devices The device used to accurately mark diametral specimens is described in detail in this section.
Then mark the diametral axis on Me front and back md Me specimen without moving the specimen making sure Mat it passes Trough the center points. Very thin lines were precisely drawn at the ends of the loading strips to facilitate alignment of the specimen. The equations derived for a 4 in.
The specimen can be rocked in the lower platen to make sure that it has full contact with the extensometer assembly and hence ascertaining the longitudinal alignment of the specimen with the loading strips Figure And. It is small and simple enough to be used in many small environmental chambers. Alignment should be easy to accomplish since the legs have already been fixed on He brass arms in ache proper positions.
Agenda and minutes
In Me first case, determine Me approximate center of Me polygon. This fixture can be easily used in many standard environmental chambers without modifications.
The absence of resistance to the movement in the transverse direction might be considered as a drawback of the device. A short attachment is made on the fixed upper part of the device to obtain measurements in the vertical direction with a EVDT mounted through it. Full details of this proposal would be available later in the day. Also, you can type in a page number and press Enter to go directly to that page in the book.
Also, there is a tendency for the upper loading strip to move during testing.
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The alignment of the MTS loading system was periodically checked. Equation 5 when solved for resilient modulus and Equation 7 closely resemble We analogous equations for resilient modulus given in ASTM D Final Report Chapter: A very short Hence smaller weight ram attached to the upper loading platen was used in one experiment to determine if a significant difference mw in the control of rocking compared to a long, heavy ram.
The arms are made using channel selections and have grooves in them in which small mounting blocks can be positionM.