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Standard Test Method for Shear Modulus at Room Temperature
STANDARD published on 10.11.2002
Designation standards: ASTM E143-02
Note: WITHDRAWN
Publication date standards: 10.11.2002
SKU: NS-41735
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
shear modulus, stress-strain diagram, torque-twist diagram, ICS Number Code 77.040.10 (Mechanical testing of metals)
Significance and Use | ||||||||
Shear modulus is a material property useful in calculating compliance of structural materials in torsion provided they follow Hooke’law, that is, the angle of twist is proportional to the applied torque. Examples of the use of shear modulus are in the design of rotating shafts and helical compression springs. Note 3—For materials that follow nonlinear elastic stress-strain behavior, the value of tangent or chord shear modulus is useful for estimating the change in torsional strain to corresponding stress for a specified stress or stress-range, respectively. Such determinations are, however, outside the scope of this standard. (See for example Ref (1).)3 The procedural steps and precision of the apparatus and the test specimens should be appropriate to the shape and the material type, since the method applies to a wide variety of materials and sizes. Precise determination of shear modulus depends on the numerous variables that may affect such determinations. 5.3.1 These factors include characteristics of the specimen such as residual stress, concentricity, wall thickness in the case of tubes, deviation from nominal value, previous strain history and specimen dimension. 5.3.2 Testing conditions that influence the results include: axial position of the specimen, temperature and temperature variations, and maintenance of the apparatus. 5.3.3 Interpretation of data also influences results. |
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1. Scope | ||||||||
1.1 This test method covers the determination of shear modulus of structural materials. This test method is limited to materials in which, and to stresses at which, creep is negligible compared to the strain produced immediately upon loading. Elastic properties such as shear modulus, Young's modulus, and Poisson's ratio are not determined routinely and are generally not specified in materials specifications. Precision and bias statements for these test methods are therefore not available. 1.2 Values stated in inch-pound units are to be regarded as the standard. SI units are provided for information only. 1.3 t to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||
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