Evaluating the quality of a material by it's ability to resist cracking or deformation during a bend


bend foam 1Bend tests deform the test material at the midpoint causing a concave surface or a bend to form without the occurrence of fracture and are typically performed to determine the ductility or resistance to fracture of that material. Unlike in a flexure test the goal is not to load the material until failure but rather to deform the sample into a specific shape. Bending tests are as popular as tensile test, compression test, and fatigue tests. 

How to Perform a Bend Test?

To perform a bend test, the test sample is loaded into a bend test machine with a bend fixture in a way that creates a concave surface at the midpoint with a specified radius of curvature according to the standard in relation to which the test is performed.

What is the Purpose of Bend Testing?

Bend testing a material allows for the determination of that materials ductility, bend strength, fracture strength and resistance to fracture. These characteristics can be used to determine whether a material will fail under pressure and are especially important in any construction process involving ductile materials loaded with bending forces. If a material begins to fracture or completely fractures during a three or four point bend test it is valid to assume that the material will fail under a similar in any application, which may lead to catastrophic failure.

What Are the Four Common Types of Bend Tests?

There are four common types of bend tests. In a guided bend test, the sample is placed horizontally across two supports and then a force applied to the top of the midpoint deforming the sample into a “U” shape. In a semi-guided bend test, the specimen’s midpoint is bent to a specific angle or inside radius. In a free bend test, the ends of the sample are pushed together, but no force is applied to the bend itself. Finally, a common fracture toughness test (ASTM E399) consists of a sample with a precracked starter crack on the bottom side of the midpoint which is loaded into a 3-point bend fixture so that the midpoint force is applied on the opposite face from the fracture.

What Are the Different Types of Materials Used in Bending Applications?

Generally a bending test is performed on metals or metallic materials but can also be applied to any substance that can experience plastic deformation, such as polymers and plastics. These materials can take any feasible shape but when used in a bend test most commonly appear in sheets, strips, bars, shells, and pipes. Bend test machines are normally used on materials that have an acceptably high ductility. 

Common Use of Bend Tests:

One of the more popular uses of bend testing is in the area of welds. The purpose of bend testing welds is to make sure that the weld has properly fused to the parent metal and that the weld itself does not contain any defects that may cause it to fail when it experiences bending stresses. The sample weld is deformed using a guided bend test so that it forms a “U” subjecting the material on the outer surface to a tensile force and the material on the inside to a compressive force. If the weld holds and shows no sign of fracture it has passed the test and is deemed an acceptable weld. 

Popular Testing Applications

ASTM C648 break strength test of ceramic tile method provides means for establishi...
ISO 178 standard defines the test method for flexural strength of plastics. Flexu...
ASTM A370 Tensile tests provide information on the strength and ductility of mater...
Steel welded wire reinforcements are used in the concrete construction industry to...
Guided bend tests provide a quality control check that helps determine the ductili...
ASTM D143 contains the standard test methods for testing small clear timber specim...
The tensile and bend testing of high strength rebar (reinforcement bar) may be com...
The ASTM F543 medical bone screw torsion test is a specification for assessing th...
Flexural strength testing of Wood is accomplished with three point bend fixtures. ...
Glass is difficult to grip so glass strength is measured in flexure or bending. Mo...
Printed circuit board assemblies experience various mechanical loading conditions ...
The nature of wood fiber and wood particle-based materials gives them many of the ...
ASTM A82 is used to test welded wire that is used in the reinforcement of concrete...
ASTM B528 covers the standard test method for transverse rupture strength of metal...
ASTM F383 describes a method for static bend and torsion testing of intramedullary...
BS 6319-3 tests rectangular prisms under four point loading. Keywords: Plastics; P...
The concrete construction industry relies on quality steel wire and welded wire re...
ASTM E290 covers bend testing for ductility of materials. Included in the procedur...
The nature of wood fiber and wood particle based materials gives them many of the ...
ASTM C158 is a common guideline for bend testing on glass and glass-ceramics. When...
Introducing a new dental implant design to market is a daunting task with an impre...
The ductility of metallic materials helps provide a visual indication of the ducti...
ASTM E190 covers a guided bend test for the determination of soundness and ductili...
ASTM B312 covers the standard test method for green strength of specimens compacte...
Dental implant fatigue test equipment is used to test titanium implants that are a...
The purpose of this test is to empirically determine the modulus of rupture or ben...
JEDEC 9702 monotonic bend testing method is intended to characterize the fracture ...
ISO 2493-1 specifies procedures, based on the two-point loading principle, for det...
ASTM A720 is a specialized bend test for nonoriented electrical steel not covered ...
ISO 15835-2 specifies test methods applicable to couplers for mechanical splices o...
ISO 4049 specifies a three point flexural bend test requirements for dental polyme...
Calcium phosphate and metallic coatings are used worldwide in numerous application...
BS 373 provides standard test methods for testing the various properties of clear ...
ASTM F2082 Standard Test Method for Determination of Transformation Temperature of...
Ampoules are packaging materials for storing pharmaceutical products until they ar...
This standard test method includes a wide range of mechanical test methods that ar...
ASTM A732 mechanical tests of cast low alloy steel specification covers carbon and...
ASTM A496 tension strength test and bending strength test on steel wire. Steel wir...
Specifies the method for determining the ability of sheet and strip to undergo pla...
ISO 7438 specifies a method for determining the ability of metallic materials to u...
EN ISO 1288 specifies the determination of the bending strength of monolithic glas...
ASTM E855 offers several test methods for determining the modulus of elasticity in...
This standard covers the gas and arc welding of butt, fillet, and socket welds in ...
ASTM F2193 provides a comprehensive reference for the components of systems used i...
ASTM F384 covers specifications and test methods for angled devices used in the su...
ASTM B406 is used as a means of determining the quality of cemented carbide grade ...
The guided bend testing on welded materials requirements are covered in AWS B4.0, ...
Specifies test methods applicable to steel reinforcing bars, wire rod and wire use...
ASTM F2606 determines the flexural creep of plastics in the form of standard test ...
ASTM F1691 covers the test procedure for determining the axial pull-out strength o...
ASTM F1264 provides specification of the design and mechanical properties associat...
ASTM D6415 covers the curved beam strength of fiber-reinforced polymer-matrix comp...
These test methods provide a means for determining the modulus of rupture and the ...
EN ISO 8491 Metallic Tube Bend Test Method Give our test engineers a call today fo...
ISO 28704 specifies a test method for determining the cyclic four-point bending fa...
Battery of mechanical tests for identification cards. Give our test engineers a ca...
ASTM C1025 covers determination of the modulus of rupture in bending of specimens ...
ASTM F564 describes testing methods to determine the following mechanical properti...
Increasing demand for high quality and reliable electronic components and material...
Weld strength is commonly tested using a universal test machine equipped with spec...
Determining how to flexural bend test plastics and polymers involves a three step ...
Increasing demand for high quality and reliable electronic components and material...

How to Select a Bend Test Machine in 4 Easy Steps

  • Step 1 - Select your frame
  • Step 2 - Select your controller software
  • Step 3 - Select your accessories
  • Step 4 - Contact us

Start by Selecting Your Frame

Bend Test Machines
Bend Test Machines

A bend tester is configured to your requirements by our application engineers with a three or four point bend test fixture, the correct controller, and a deflectometer if you would like to measure sample deflection directly and accurately.

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Popular Bend Accessories

Base is included with anvils, one upper loading anvil, two lower supporting anvils...
Two bases are included with three upper loading anvils, two lower supporting anvil...
3 point bend fixture with interchangable rollers with centering anvils
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with one upper loading anvil, two lower supporting anvils, and tw...
3 point bend fixture with interchangable rollers 4-10 mm with articulating rollers...
3 point bend fixture with interchangable rollers with centralized adjustment. 300 ...
Long beam bend fixture for civil engineering structural tests.
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Four point bend fixture with interchangable rollers.
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Tensile bend fixture for static flexural tests of materials.
Base is included with one upper loading anvil, two lower supporting anvils, and tw...
Two bases are included with two upper loading anvils, two lower supporting anvils,...
Two bases are included with articulating anvils, two upper loading anvils, two low...
Tensile bend fixture for static flexural tests of materials.
Two bases are included with articulating anvils, two upper loading anvils, two low...
Two bases are included with articulating anvils, two upper loading anvils, two low...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
4 point bend fixture with interchangable rollers 6-10 mm with articulating rollers...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
4 point bend fixture with interchangable rollers. 4-8 mm upper and 3-10 mm base. 3...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Single lower 360mm base with single upper 240mm base rated 100 kN, 100mm wide anvi...
Two bases are included with articulating anvils, two upper loading anvils, two low...
Base is included with one upper loading anvil, two lower supporting anvils, and tw...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Tensile bend fixture for static flexural tests of materials.
Long beam bend fixture for civil engineering structural tests.
Two bases are included with two upper loading anvils, two lower supporting anvils,...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with one upper loading anvil, two lower supporting anvils, and tw...
Two bases are included with three upper loading anvils, two lower supporting anvil...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Two bases are included with three upper loading anvils, two lower supporting anvil...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Two bases are included with two upper loading anvils, two lower supporting anvils,...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Two bases are included with three upper loading anvils, two lower supporting anvil...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...
Base is included with articulating anvils, one upper loading anvil, two lower supp...