DETERMINATION OF MATERIAL BEHAVIOUR IN TENSILE TESTS USING HYDRAULIC TESTING MACHINES

In tensile testing, the deformation of material in response to loading is determined, and test results can be plotted in stress-strain diagrams in which the experimentally determined curve represents the deformation behaviour of the material under specified test conditions. The author explains how the shape of this curve depends on the rate of deformation which occurs during the course of the test, so that in comparing various tensile test results, attention must be paid to the rate of deformation. This problem is discussed in relation to existing standards (eg. Din 50146). The influence of compliance of the test system on strain rate is discussed, which the author feels should enable full utilisation of newly developed testing machines, and also of older types, to be carried out at defined strain rates. To determine compliance, use is made of the advantages offered by electric measuring devices. These can be an integral part of the machine, as is shown in an example of a Schenck-Trebel materials testing machine. Examples are given showing methods of carrying out tensile tests with defined strain rates. /TRRL/

• Corporate Authors:

  Society of Engineers

  Abbey House, Victoria Street
  London SW1,   England 
• Authors:
  • Haas, T
  • Schenck, C
  • Darmstadt, A G
• Publication Date: 1976-9

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 11-16
• Serial:
  • Society of Engineers Journal
  • Volume: 15-3
  • Publisher: Parsifal College

Subject/Index Terms

• TRT Terms: Acceptance tests; Curves (Geometry); Deformation; Electrical equipment; Electricity; Hydraulic equipment; Instruments for measuring electricity; Loads; Measuring instruments; Standards; Strain (Mechanics); Stresses; Tension; Tension tests; Tests
• Uncontrolled Terms: Hydraulic machinery; Strain rate
• Geographic Terms: Germany
• Old TRIS Terms: Electric measuring instruments; Tensile test
• ITRD Terms: 6155: Apparatus (measuring); 6496: Curve (math); 5595: Deformation; 6954: Electricity; 8125: Germany; 5567: Load; 187: Specification (standard); 5575: Stress (in material); 5502: Tension; 6255: Test
• Subject Areas: Geotechnology; Highways; Materials; I30: Materials;

Filing Info

• Accession Number: 00145382
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Apr 13 1977 12:00AM