Tensile Shear Strength of Wood Adhesive from Recycled Polystyrene

2014 ◽  
Vol 554 ◽  
pp. 3-6
Author(s):  
Muhammad Azrie Husainy Mohd Jasri ◽  
Mohd Afendi ◽  
N.Z. Nik ◽  
B. Izzawati ◽  
S. Nurhashima ◽  
...  
Keyword(s):  
Shear Strength ◽  
Low Cost ◽  
Wood Adhesive ◽  
Tensile Shear Strength ◽  
Lap Joint ◽  
Tensile Shear ◽  
Marine Structures

This paper discloses a method to recycle polystyrene (PS) waste by adding ethanol based hydrocarbons solvent to produce a novel adhesive for wood joining application. In the experiments, tensile shear strength of wood lap joint having various overlap lengths was conducted. It was found that this new adhesive has significant shear strength as compared to commercial wood adhesive. This relatively low cost adhesive has potential to be used for wood joining application especially in marine structures.

Shear Strength and Fracture Location of Dissimilar A6063 Aluminum Alloy and SUS430 Stainless Steel Lap Joint

2018 ◽  
Vol 773 ◽  
pp. 196-201 ◽  
Author(s):  
Paiboon Yaemphuan ◽  
Surat Triwanapong ◽  
Kittipong Kimapong
Keyword(s):  
Stainless Steel ◽  
Shear Strength ◽  
Welding Speed ◽  
Joint Interface ◽  
Tensile Shear Strength ◽  
Fracture Path ◽  
Lap Joint ◽  
Tensile Shear ◽  
Rotating Speed ◽  
Tilted Angle

In this paper, friction stir welding (FSW) was used to weld the dissimilar A6063 Aluminum/SUS430 stainless steel lap joint with various parameter setting in a welding process. The setting included a rotating speed between 125-750 rpm, a welding speed between the 25-175 mm/min and 0-5 degrees of tool tilted angle. The welded lap joints were systematically examined in regard of the tensile-shear strength, the fracture path, and microstructure. The experimental results were concluded as follows. The decrease in the welding heat input generated from the low rotating speed and the high welding resulted in decreasing of the shear strength. A degree of a tool tilted angle affected a shear strength, and a change in the strength came from the different rate in material combination at the joint interface. The increase in a tensile-shear strength occurred for specimens produced in 0-2 degrees of a tool tilted angle while 3-5 degrees affected in decreasing. The highest shear strength of 11,870 N was obtained when the lap joint was produced by the rotating speed of 500 rpm, the welding speed of 50 mm/min and the tool tilted angle at 2 degrees. The fracture path found in the specimen with the maximum shear strength was located in the Al stirred zone, not in the joint interface.

Effects of process time and thread on tensile shear strength of Al alloy lap joint produced by friction stir spot welding

2010 ◽  
Vol 24 (3) ◽  
pp. 169-175 ◽  
Author(s):  
Mitsuo Fujimoto ◽  
Daisuke Watanabe ◽  
Natsumi Abe ◽  
Sato S. Yutaka ◽  
Hiroyuki Kokawa
Keyword(s):  
Shear Strength ◽  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Process Time ◽  
Al Alloy ◽  
Tensile Shear Strength ◽  
Lap Joint ◽  
Tensile Shear ◽  
Friction Stir

Effect of Probe Thread on Friction Spot Joint Strength of AZ31 Mg Alloy

2008 ◽  
Vol 580-582 ◽  
pp. 351-354 ◽  
Author(s):  
Kazuhiro Nakata ◽  
Hirohisa Ikegami ◽  
Takuya Tsumura
Keyword(s):  
Shear Strength ◽  
Joint Strength ◽  
Mg Alloy ◽  
Tensile Shear Strength ◽  
Lap Joint ◽  
Tensile Shear ◽  
Az31 Mg Alloy ◽  
Spot Joining

Lap joint of AZ31 Mg alloy extruded sheet can be successfully made by friction spot joining (FSJ) process. Joint strength was strongly affected by the probe thread, which increased the plastically deformed zone around a rotating probe and increased the tensile shear strength of the joint in comparison with the joint made by a thread-less probe.

scholarly journals Characterization of wood-adhesive bonds in wet conditions by means of nanoindentation and tensile shear strength

2020 ◽  
Vol 78 (3) ◽  
pp. 449-459
Author(s):  
Stefan Bockel ◽  
S. Harling ◽  
P. Grönquist ◽  
P. Niemz ◽  
F. Pichelin ◽  
...  
Keyword(s):  
Shear Strength ◽  
Wood Adhesive ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Adhesive Bonds

scholarly journals Enzymatic Conversion of Lignosulfonate into Wood Adhesives: A Next Step towards Fully Biobased Composite Materials

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 259
Author(s):  
Raphaela Hellmayr ◽  
Sabrina Bischof ◽  
Jasmin Wühl ◽  
Georg M. Guebitz ◽  
Gibson S. Nyanhongo ◽  
...  
Keyword(s):  
Shear Strength ◽  
Critical Factor ◽  
Wood Adhesive ◽  
Polymerization Process ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Wood Adhesives ◽  
Practical Applications ◽  
Wetting Properties ◽  
Significant Difference

This study investigates the effect of the enzymatic polymerization of lignosulfonate for the formulation of a lignosulfonate-based adhesive. For this, beech lamellas were glued together and tested according to the EN 302-1 standard. The results showed that the laccase-polymerized lignosulfonate-based wood adhesives (LS-p) had similar mechanical properties as a standard carpenter’s glue (PVAc-based D3 class white glue), as no significant difference in tensile shear strength between these two adhesive types was found. However, carpenter’s glue showed almost 100% wood failure, while with the lignosulfonate-based wood glue, the samples failed, mainly in the glueline. Pre-polymerization of LS-p is the most critical factor to achieve the required viscosity, which is also connected to the wetting properties and the resulting tensile shear strength. The longer the pre-polymerization, the higher the viscosity of the LS-p adhesive, with the tensile shear strength reaching a plateau. The presented data show the potential of using enzymatically pre-polymerized lignosulfonate as a well-performing wood adhesive. Further development and optimization of the pre-polymerization process is required, which is also important to push towards upscaling and practical applications.

Evaluation of Tensile Shear Strength for Lap Joint of Dissimilar Steels

2021 ◽  
Vol 1016 ◽  
pp. 1454-1459
Author(s):  
Yasuhito Takashima ◽  
Tomo Washio ◽  
Fumiyoshi Minami
Keyword(s):  
Shear Strength ◽  
Shear Test ◽  
Rotation Angle ◽  
Lap Joints ◽  
Weld Bead ◽  
Tensile Shear Strength ◽  
Lap Joint ◽  
Tensile Shear ◽  
Dissimilar Steels ◽  
Grade Steel

The influence of different thickness combinations was investigated on the strength of the lap joint of dissimilar steels. In this study, lap joints of dissimilar steels were welded by laser welding. The tensile shear test was conducted for the lap joints. Rotational deformation process around the weld bead of the lap joint was observed by a digital video camera during the test. Motion analysis from the video of the tensile shear test indicated that the rotation angle around the weld bead was reduced by overlapping higher strength grade steel. Three-dimensional elastic-plastic finite element analysis was performed for the tensile shear test of the lap joint. The numerically calculated deformation behavior of the lap joint subjected to tensile shear loading showed reasonable agreement with the experimental record. It was found that the rotation angle was reduced and tensile shear strength of the lap joint increase by overlapping higher strength grade steel sheet.

scholarly journals Chitosan-Based Adhesive: Optimization of Tensile Shear Strength in Dry and Wet Conditions

2021 ◽  
Vol 2 (1) ◽  
pp. 110-120
Author(s):  
Maisa Abdelmoula ◽  
Hajer Ben Hlima ◽  
Frédéric Michalet ◽  
Gérard Bourduche ◽  
Jean-Yves Chavant ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Shear Strength ◽  
Bond Strength ◽  
Water Resistance ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Spread Rate ◽  
Assembly Time ◽  
Deacetylation Degree ◽  
Dry And Wet Conditions

Commercial adhesives present a high bond strength and water resistance, but they are considered non-healthier products. Chitosan can be considered as an interesting biosourced and biodegradable alternative, despite its low water resistance. Here, its wood bonding implementation and its tensile shear strength in dry and wet conditions were investigated depending on its structural characteristics. Firstly, the spread rate, open assembly time, drying pressure, drying temperature, and drying time have been determined for two chitosans of European pine double lap specimens. An adhesive solution spread rate of 1000 g·m−2, an open assembly time of 10 min, and a pressure temperature of 55 °C for 105 min led to a bond strength of 2.82 MPa. Secondly, a comparison between a high molecular weight/low deacetylation degree chitosan and a lower molecular weight/higher deacetylation degree chitosan was conducted. Tests were conducted with beech simple lap specimens in accordance with the implementation conditions and the conditioning treatments in wet and dry environments required for thermoplastic wood adhesive standards used in non-structural applications (EN 204 and EN 205). The results clearly revealed the dependence of adhesive properties and water resistance on the structural features of chitosans (molecular weight and deacetylation degree), explaining the heterogeneity of results published notably in this field.

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