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Today, let's get into the tensile testing of plastic composite materials, specifically following the ISO 527-4 international standard

[Tensile Testing of Plastic Composite Materials]

Tensile testing of plastic composite materials involves understanding and measuring how the material responds to force and deformation. 

This test is particularly crucial when plastics or polymer-based materials are used in conjunction with reinforcing materials like fibers (e.g., glass fibers, carbon fibers). Tensile tests on plastic composite materials provide essential information for predicting and designing how these materials will behave in real-world applications.

[International Standards for Tensile Testing of Plastic Composite Materials]

Several internationally recognized standards exist for conducting tensile tests on plastic materials:

ISO 527-1: Plastics - Determination of tensile properties - Part 1: General principles: Covers the general principles of tensile testing for plastic materials.

ASTM D638: Standard Test Method for Tensile Properties of Plastics: Provides a standard method for conducting tensile tests on plastic materials.

ASTM D882: "Standard Test Method for Tensile Properties of Thin Plastic Sheeting": Provides a method for measuring tensile properties of thin plastic sheets or films.

ISO 527-4: Determination of tensile properties - Part 4: Test conditions for isotropic and orthotropic fibre-reinforced plastic composites: Defines the test conditions for tensile testing fiber-reinforced plastic composites.

Now, let's take a closer look at ISO 527-4:

[ISO 527-4]

ISO 527-4 covers the tensile testing of fiber-reinforced plastic composite materials. Specifically, this standard defines conditions for tensile testing isotropic and orthotropic fiber-reinforced composite materials, providing standardized test methods. This ensures consistent evaluation of the mechanical properties of plastic composite materials across various industries.

The test evaluates the tensile properties of the material, including tensile strength, tensile modulus, Poisson's ratio, and tensile stress-strain characteristics.

Tensile Strength: Measures how much stress the material can withstand as it elongates, expressed as force per unit area.

Tensile Modulus: Measures how much the material deforms under stress, indicating the ratio of stress to strain.

Poisson's Ratio: Indicates how the material deforms in the opposite direction during tension.

Tensile Stress-Strain Characteristics: Represents the relationship between stress and strain during the tensile test.

[Equipment for ISO 527-4 Testing]

To conduct tensile tests on plastic materials according to ISO 527-4, you'll need suitable universal testing machines (UTM) and various accessories. Here are the key requirements:

1) Universal Testing Machine (UTM)

: A UTM capable of measuring force and deformation according to the specifications in ISO 527-4 is necessary.

SALT offers a lineup of universal material testing machines suitable for tensile testing.

2) Grips

: Appropriate grips are crucial for securely holding the specimen during testing.

 Salt's provides various grips, including side-action grips and wedge grips.

Salt's Tensile Testing Grip

Salt's Wedge Grip

Salt's  Side Action Grip

3) Extensometer

: Used to accurately measure specimen deformation during testing. ISO 527-4 may specify certain types of extension measurement devices.

a. non-contact video extensometers

b. automatic extensometers

c. encoder-based extensometers

d. strain gauge-based extensometers

strain gauge sensors and dedicated amplifiers.

4)Temperature and Humidity Control Devices

: For certain tests, specific temperature or humidity conditions may be necessary. In such cases, a system to control both the UTM and the testing environment is required.

Salt's offers an environmental chamber-type universal material testing machine (ST-1003)

Using Salt's Universal Material Testing Machine, grips, and extensometer for tensile testing.

Salt Co., Ltd.'s all-purpose material tester provides a variety of grips, 

extensometers and test solutions to meet the requirements of physical property testing of various materials.

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Salt-s@Light-Salt.kr

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