28 июля, 2015 
Malyar Quantitative data requirements for stuctural analysis depend on the design approach and, therefore, the type of analysis to be performed. However, all the theoretical methods for predicting joint strength require:
(1) adherend tensile modulus (E) and Poisson’s ratio (v)
(2) adhesive shear (Ga) and tensile (Ea) moduli, and Poisson’s ratio (va)
Additionally, analyses which allow for adhesive non-linear behaviour will need data on ductility, e. g.:
(3) yield stress (strain) and ultimate stress (strain), in shear or tension, or both
Some analyses require adhesive physical properties such as:
(4) coefficients of thermal and hygroscopic expansion.
A number of analysts (e. g. 5, 19) maintain that non-linear analysis is the key to being able to predict failure of bonded joints. It is also apparent that the strength of bonded joints, however loaded, is determined largely by the ultimate stress or the ultimate strain capability of the adhesive in tension.
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Definitions |
ASTM D907-82(85) |
Standard definitions of terms |
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relating to adhesives |
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Axially-loaded |
BS 5350: Part C3: 1978 |
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butt joints |
ASTM D897-78(83) ASTM D2094-69 (80) and |
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Specifically for bar — and rod |
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D2095-72(83) |
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shaped specimens |
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BS 5350: Part C6: 1981 |
Bond strength in direct tension |
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in sandwich panels |
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Lap joints loaded |
BS 5350: Part C5: 1976 |
Single — or double-lap joint test |
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in tension |
ASTM D1002-72(83) |
Basic metal-to-metal single lap |
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joint test |
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ASTM D3528-76 (81) |
Double-lap joint test |
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ASTM D3163-73(84) and |
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Specifically for polymeric |
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D3164-73(84) |
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substrates |
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ASTM D2295-72 (83) |
Single-lap joint test for metal- |
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to-metal joints at elevated temperatures |
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ASTM D2557-72(83) |
As above but at low temperatures |
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ASTM D905(86), D906(82) |
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Specifically for wooden joints |
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D2339-82 and D3535-79(84) |
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ASTM D3983-81(86) |
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Thick substrates used; shear |
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Test |
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Standard |
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Remarks |
BS 5350: Part C9: 1978 and A STM D3167-76(81)
BS 5350: Part CIO: 1979 and BS 5350: Part C14: 1979 BS 5350: Part СИ: 1979 and ASTM D903-49(83)
BS 5350: Part C12: 1979 and ASTM D 1976-72(83) ASTM D1781-76(81)
BS 5350: Part C13: 1980 ASTM D429-73
ASTM D4027-81(86)
ASTM D229-70(81)
ASTM 2182-72(78)
BS 5350: Part C15: 1982
BS 6319: Part 4: 1984
BS5350: Part G2: 1987
modulus and strength of adhesive determined
Floating-roller test 90° peel test 180° peel test
‘T’ peel test for flexible-to — flexible assemblies Climbing drum test for skin — sandwich
Rubber-to-metal bonding
Modified rail test See Torque strength Disk shear in compression Bond strength in compressive shear
Slant shear test, loaded in compression, for resins used in construction; concrete substrates used Collar and pin bonded with anaerobic adhesive and loaded in tension
strength and shear modulus of structural adhesives (napkin — ring specimen)
![Подпись: Test Standard Remarks Cleavage strength BS 5350: Part Cl: 1986 ASTM D1062-72(83) ASTM D3433-75(85) ASTM D3762-79(83) ) Compact tension specimen ) Parallel- or tapered doublecantilever-beam joint for determining the adhesive fracture energy, G]C Wedge cleavage test (for aluminium adherends) Fatigue strength ASTM D3166-73(79) Single-lap joint loaded in tension Flexural strength ASTM D1184-69(86) Laminated assemblies Torque strength ASTM E229-70(81) For determining pure shear](/img/1207/image099.gif "Structural analysis requirements")
ASTM D3658-78(84) Specificallly for ultra-violet
light-cured glass-metal joints
BS 5350: Part Gl: 1987 Anaerobic adhesives on threaded
fasteners
Impact resistance ASTM D3807-79(84)
ASTM D950-82 BS 5350: Part C4: 1986
Creep resistance BS 5350: Part C7: 1976
ASTM D1780-72(83) and ASTM D2294-69(80) ASTM D2293-69(80)
ASTM D2918-71(81) ASTM D2919-84
ASTM D3762-79(83) ASTM D1151-84
ASTM D1183-70(81)
ASTM D904-57(82)
ASTM D896-84 ASTM D3632-77(82) ASTM D1828-70(81) ASTM D1879-70(81)
Plastics-to-plastics joints ) Block shear specimen )
Various test geometries permitted ) Single-lap joint loaded in
) tension
Single-lap joint, having long overlap, and loaded in compression
Subjected to stress, moisture and temperature; uses peel joint As above, but uses single-lap shear joint loaded in tension As above but uses a wedge test Exposure to moisture and temperature
Exposure to cyclic laboratory ageing conditions Exposure to artifical and natural light
Exposure to chemical reagents Exposure to oxygen Natural weathering Exposure to high-energy irradation
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