WOOD FLEXURE

Bend tests provide a quick and simple way to determine the strength and deformation properties of wood and timber products. A range of fixtures are available to cater for various specimen sizes and strengths. All fixtures can be equipped with optional support rollers, some of which feature articulation to cater to warped specimens. These fixtures are ideal for tests on MDF and fiberboard, as well as natural timber.

Principle of Operation

2820-04x Series bend fixtures are designed for static bend/flexure testing on a range of wood and timber products according to common international standards. The beam attaches to the test instrument using simple mechanical interfaces that allow it to be removed when not in use. A range of optional support anvils and four-point conversion kits allow the fixtures to be configured to meet a wide range of standards. Specimens of the required size are supported by two anvils attached to a base beam. Force is applied either at the center (three-point bend) or at two points between the supporting rollers (four-point bend).

Application Range

• Static bending tests on a wide range of wood and timber specimens, including MDF and fiberboard at ambient temperatures

• Meets the following standards when used with appropriate optional anvil sets/4-point conversion kits and/or deflectometry: JIS A5905, JIS A5906, JIS A5908, JAS 112, JAS 601, BS 373, BS 5669, EN 310, EN 789, ISO 3133, ASTM D1037, ASTM D3037 and ASTM D143

Safety Advice

Review safety note on page 234

BASE BEAMS

Wood Flexure Fixtures

4-POINT UPPER BEAMS

3-POINT ANVIL SETS FOR 2820-040/041/042

4-POINT ANVIL SETS FOR 2820-043/044 UPPER BEAMS

Yoke Deflectometer

Wood Flexure Fixtures

• Required

• Select 1 based on requirements

• Select 1 based on maximum span and load

Note:

1. If multiple configurations are purchased, duplicates are not required.

The fixture consists of a high-strength steel body with a sliding, self-aligning anvil that is used to apply compressive loading to the specimen in shear. The shear line can be set at 0.0 mm, 2.0 mm or 3.0 mm by using shims. The shims are clearly engraved with the applicable standard and are easy and quick to change. The fixture is attached to the testing system using simple Clevis pin interfaces, which allow quick and easy fitting and removal.

Principle of Operation

The fixture consists of two main components. A sliding shear blade with a self-aligning anvil contacts the specimen that is supported in the body of the fixture. The shear blade moves downwards under compression and applies a shear force to the specimen. The self-aligning anvil ensures uniform lateral distribution of the applied load. A screw-action specimen clamp with self-aligning thrust pad holds the specimen securely during testing.

Application Range

• Static shear tests on a wide range of wood and timber specimens and adhesive bonds at ambient temperatures.

• Meets the following standards: ASTM D143-94, ASTM D905-98, ISO 6238 2001, JIS K 6802-1973, JIS Z 2117-1977, BS 373: 1957 and JAS 601-1974

Parallel To Grain

Wood Tension Fixtures

The tensile properties of wood, adhesives and fasteners can be determined using a range of specialized fixtures. Each device has been designed to meet a particular standard.

Principle of Operation

Tensile properties of wood can be determined using wedge action grips or special shoulder-loading grips. Shoulder loading is also used to assess adhesive properties in tension using specially prepared specimens. The withdrawal force of screws and nails can be tested using specially designed tooling to grip the fastener.

Application Range

• Tensile tests on wood, adhesive bonds and fasteners in timber products.

Safety Advice

Review safety note on page 234

ITEMS FOR USE WITH 2820-061