US9023450B2 - High Lap Shear Strength, Low Back Face

  • The Influence of Process Parameters on Microstructure and ...

    Jan 02, 2011· Table 2 shows the lap shear test results. The results indi-cate that at lower rotational speeds, lower welding speed leads to better shear strength of the joint. But at higher rota-tional speeds, changing of the welding speed has an inverse effect on the joint properties. Table 2. Maximum fracture load for specimens with various welding conditions

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  • Edge and face gluing of green timber using a one-component ...

    Table 1; LD low density, HD high density, MC moisture content As concerns wood density, the better shear strength results for high-density samples over low …

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  • (PDF) The effect of temperature on the mechanical ...

    May 15, 2021· tion consists of two face sheets that carry the bending. ... F or Araldite A V118 adhesive, high-strength steel sub- ... lap shear strength of Sikaflex-552 SLJs as a function of.

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  • LP OSB Sheathing - LP Building Solutions

    Product Specifications. Available Sizes: 47-7/8˝ x 95-7/8˝ panels (Longer panels and custom thicknesses are also available. Please call (800) 964-6310 for more info.) For additional strength and stiffness in shear wall applications, specify our APA Rated Struc-I® sheathing. LP OSB panels are certified by the APA – The Engineered Wood ...

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  • Shear Strength - an overview | ScienceDirect Topics

    The residual shear strength of a liquefied soil can be determined in the laboratory or can be estimated using correlations between in situ test data and liquefied shear strength obtained through back analysis of field case histories. Field data, compared to laboratory tests, tend to indicate much lower shear strengths. As well as the difficulty in obtaining true, undisturbed …

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  • The R&D Dept.: Local patents for 11.29.17 - Richmond BizSense

    Nov 29, 2017· High lap shear strength, low back face signature UD composite and the process of making . Patent No. 9,821,515. Fabrication of ballistic resistant fibrous composites having improved ballistic resistance properties. More particularly, ballistic resistant fibrous composites having high interlaminar lap shear strength between component fiber plies ...

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  • Edge and face gluing of green timber using a one-component ...

    Table 1; LD low density, HD high density, MC moisture content As concerns wood density, the better shear strength results for high-density samples over low-density samples (Fig. 3) were likely due ...

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  • How to Perform an Adhesive Lap Joint Shear Strength Test ...

    Shear joints impose uniform stresses across the bond area which results in the highest possible joint strength. ASTM D1002 is commonly performed to measure the shear strength of adhesives that are used to bond metals. This test is similar to ASTM D3163 which is for adhesives that bond rigid plastic substrates, and also ASTM

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  • Lab of Shear Strength Essay - 1266 Words

    Jul 06, 2013· ...1. (a) A glued lap splice is to be made in a 10 × 20 mm rectangular member at α =20°, as shown in Fig.1. Assuming that, the shear strength of the glued joint controls the design, what axial force P is to be applied to the member to get separated to 2 parts? Assume the shear strength of the glued joint to be 10MPa. Fig: 1 (b) An exploded view of a bolted connection is …

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  • eOceanic

    The following gives the shear strength parallel to grain for five different wood species: Glue strength is assessed by measuring the lap shear strength in appropriately designed joints. For cured epoxy adhesive mixes it is generally between 1500 - 2200 psi (120 - 150 kg/cm2) depending on the epoxy system employed.

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  • Chapter 23: Wood, California Building Code 2016 (Vol 1 & 2 ...

    The effect of treatment and the method of redrying after treatment, and exposure to high temperatures and high humidities on the flexure properties of fire-retardant-treated softwood plywood shall be determined in accordance with ASTM D5516. The test data developed by ASTM D5516 shall be used to develop adjustment factors, maximum loads and spans, or both, for …

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  • Mechanical Properties Characterization of Composite ...

    on single lap-shear aluminum specimens (table 111) showed that the adhesive retained 60 percent of its room-temperature lap-shear strength at 121 OC. The specimens measured 2.5 cm (1.0 in.) wide by 17.8 cm (7.0 in.) long by 0.32 cm (0.125 in.) thick. The overlap was 1.3 cm (0.5 in.). Although the TEST METHODS Tensile Tests

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  • Bolt Grades

    sectional area typically) and shear strength (bolt prevents parts from separating by using it’s shank or body as a stop). Depending on how you are using the fastener, you would look at the appropriate and corresponding strength type. For example, bolts that attach a D-ring bracket to the bumper face of a vehicle would be critical in tension .

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  • Adhesive and Tape Classifications and Characteristics

    Adhesive and Tape Classifications and Characteristics. At one time, adhesive and glue were used synonymously. In industry today, however, designers and engineers are using terms like two-part low-odor acrylic, high bond tape, PUR systems, cyanoacrylate, and more. Glue is now considered to be something sticky which is no longer a characteristic ...

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  • Lap Shear Strength - an overview | ScienceDirect Topics

    Bonded lap shear specimen broken in the steel (1mm gauge). Assuming a yield strength of 280 MPa, thickness of 1.0 mm and width of 25 mm, the yield stress will be 7000 kN. With a bonded area of 300 mm 2, this results in a calculated LSS of 23.3 MPa. Testing the same adhesive according to DIN 54451 often gives an LSS of more than 40 MPa, but ...

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  • Are Biscuits Strong Enough? - The Wood Whisperer

    Feb 09, 2010· In the first video at 4:32 the unreinforced miter failed, in the shear test, at 139 lbs of force. The miter with the biscuit failed at 220 lbs of force. You can see as it fails it is the additional glue surface that the biscuit provides that is enhancing the strength of the glue joint. Incidentally the half lap ( in part 2) failed at 1918 lbs !!

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  • Laboratory strength testing of pine wood and birch bark ...

    Jun 01, 2017· Lap shear tests are widely used as adhesive joint strength tests because they are easy to conduct and closely resemble the geometry of many practical joints, including the cleft haft (Barham, 2013, Zipkin et al., 2014). The ASTM D 1002 test standard was therefore selected for the quasi-static shear strength (or low load rate) of a single-lap joint.

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  • Lap Shear Test - an overview | ScienceDirect Topics

    The single-lap shear test is commonly used to determine the in situ strength of an adhesive by placing the adhesive between two plates and applying a load until failure. The double-lap shear test is very similar, but uses three plates and two adhesive regions to account for eccentric loading, as shown in Fig. 5A .

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  • Influence of mechanical surface preparation methods on the ...

    However, the highest mean tensile shear strength of lap shear samples was achieved with face milling treatments SM1, SM2, and SM4, with the face milling fast feed speed/slow cutter speed (SM2) producing the highest mean tensile shear strength result and less variation compared to the other face milling methods. Table 2.

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  • (PDF) Determination of Shear Strength of Masonry Panels ...

    Shear tests on small-scale panels, having nominal dimensions of 500x500x120 mm (diagonal. compression tests) (Figs. 10a and 11a) revealed an average shear strength …

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  • US9023450B2 - High lap shear strength, low back face ...

    The high lap shear strength, low backface signature composites are useful for the production of hard armor articles, including helmet armor. US9023450B2 - High lap shear strength, low back face signature UD composite and the process of making - Google Patents ... Info Publication number US9023450B2. US9023450B2 US13/594,735 US201213594735A ...

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  • Dynamic strength of adhesive single lap joints at high ...

    Sep 01, 2008· The quasi-static lap-shear strength at 25 °C was 22.0 MPa at a nominal loading rate of 2.35 MPa/s. For the same temperature, the average dynamic strength was 50.5 MPa at a loading rate of 1.33 MPa/μs and 75.9 MPa at a loading rate of 4.74 MPa/μs.

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  • The R&D Dept.: Local patents for May 6, 2015 - Richmond ...

    May 06, 2015· High lap shear strength, low back face signature UD composite and the process of making Patent No. 9,023,450 Fabrication of ballistic resistant fibrous composites having improved ballistic resistance properties. More particularly, ballistic resistant fibrous composites having high interlaminar lap shear strength between component fiber plies or ...

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  • HIGH LAP SHEAR STRENGTH, LOW BACK FACE SIGNATURE UD ...

    If lap shear testing determines that a particular composite has a lower interlaminar lap shear strength than desired (e.g. less than 170 lbf), that is indicative that further fiber washing and/or further surface treatments (e.g. corona treatment, plasma treatment, etc.) should be conducted to further increase the interlaminar lap shear strength ...

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  • Adhesive Transfer Tape

    Tensile Lap Shear – Peak Load ASTM D1002-72 (0.5 square inch on #6061 aluminum) 55 lbs. Tensile Lap Shear – Peak Stress ASTM D1002-72 109 PSI Tensile Strength and Elongation ASTM D2370-82 51 PSI 1915% Thermal Conductivity (ASTM C 518, results listed are at 109°F) 0.098 BTU-ft/ ft2-hr-°F 0.17 watt/m-K 0.101 BTU-ft/ ft2-hr-°F 0.18 watt/m-K

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  • John Armstrong Young Inventions, Patents and Patent ...

    Feb 17, 2020· More particularly, ballistic resistant fibrous composites having high interlaminar lap shear strength between component fiber plies or fiber layers, which correlates to low composite backface signature. The high lap shear strength, low backface signature composites are useful for the production of hard armor articles, including helmet armor.

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  • Cladding Attachment Over Thick Exterior Rigid Insulation

    attachment of cladding though the insulation back to the structure is often not practical. Cladding Attachment Over Thick Exterior Rigid Insulation ... low high Vinyl 0.6 1.0 wood 1.0 1.5 fiber cement 3.0 5.0 stucco 10.0 12.0 ... 150lbf/fastener to drive a #10 wood screw flush with face …

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  • Araldite® adhesives core range - Selector guide

    Apr 18, 2012· Medium viscosity liquid. Araldite® AW 2104 / Hardener HW 2934 Fast curing with relative long pot life. Low shrinkage. Good combination of high shear and peel strength. ... 116 1 : 1 LSS = Lap Shear Strength Sizes product specific between 50 ml and 480 ml Sizes product specific between 0, 22 and 1 kg 4) Sizes product specific between 5 and 30 ...

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