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NEPLATNÁ ASTM C394/C394M-13 1.10.2013 náhled

Doplňující informace

ASTM C394/C394M-13

Standard Test Method for Shear Fatigue of Sandwich Core Materials

Automaticky přeložený název:

Standardní zkušební metoda pro smykové Únava sendvičových materiálů jádra

NORMA vydána dne 1.10.2013

Jazyk
Provedení	PDF - okamžité stažení - 2 005.00 Kč Tištěné - 2 005.00 Kč
Dostupnost	SKLADEM
Cena	2005.00 Kč bez DPH
2 005.00 Kč

Informace o normě:

Označení normy: ASTM C394/C394M-13
Poznámka: NEPLATNÁ
Datum vydání normy: 1.10.2013
Kód zboží: NS-13225
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Kategorie - podobné normy:

Ztužené plastické hmoty

Anotace textu normy ASTM C394/C394M-13 :

Keywords:

fatigue, sandwich core, shear strength, shear stress, ICS Number Code 83.120 (Reinforced plastics)

Doplňující informace

Significance and Use

5.1 Often the most critical stress to which a sandwich panel core is subjected is shear. The effect of repeated shear stresses on the core material can be very important, particularly in terms of durability under various environmental conditions.

5.2 This test method provides a standard method of obtaining the sandwich core shear fatigue response. Uses include screening candidate core materials for a specific application, developing a design-specific core shear cyclic stress limit, and core material research and development.

5.3 Factors that influence core fatigue response and shall therefore be reported include the following: core material, core geometry (density, cell size, orientation, etc.), specimen geometry and associated measurement accuracy, specimen preparation, specimen conditioning, environment of testing, specimen alignment, loading procedure, loading frequency, force (stress) ratio and speed of testing (for residual strength tests).

1.1 This test method determines the effect of repeated shear forces on core material used in sandwich panels. Permissible core material forms include those with continuous bonding surfaces (such as balsa wood and foams) as well as those with discontinuous bonding surfaces (such as honeycomb).

1.2 This test method is limited to test specimens subjected to constant amplitude uniaxial loading, where the machine is controlled so that the test specimen is subjected to repetitive constant amplitude force (stress) cycles. Either shear stress or applied force may be used as a constant amplitude fatigue variable.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Within the text, the inch-pound units are shown in brackets.

1.4 This standard does not purport 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.

2. Referenced Documents

C271/C271M-16(2022)e1	Standard Test Method for Density of Sandwich Core Materials (Includes all amendments and changes 5/11/2022).
E456-13a(2022)	Standard Terminology Relating to Quality and Statistics (Includes all amendments and changes 4/21/2022).
E177-20	Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E122-17(2022)	Standard Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
E6-23a	Standard Terminology Relating to Methods of Mechanical Testing (Includes all amendments and changes 3/29/2023).
E467-21	Standard Practice for Verification of Constant Amplitude Dynamic Forces in an Axial Fatigue Testing System
E739-23	Standard Guide for Statistical Analysis of Linear or Linearized Stress-Life (S-N) and Strain-Life (?-N) Fatigue Data (Withdrawn 2024)
E1012-19	Standard Practice for Verification of Testing Frame and Specimen Alignment Under Tensile and Compressive Axial Force Application
	Fibre-reinforced plastics: Determination of fatigue properties under cyclic loading conditions
D5229/D5229M-20	Standard Test Method for Moisture Absorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials
D3878-23	Standard Terminology for Composite Materials
C273/C273M-20	Standard Test Method for Shear Properties of Sandwich Core Materials
D883-24	Standard Terminology Relating to Plastics