This section provides an overview for creep testers as well as their applications and principles. Also, please take a look at the list of 12 creep tester manufacturers and their company rankings.
Table of Contents
A creep tester is a device to measure the creep phenomenon that occurs when a specific load is applied to a material.
The creep phenomenon is when strain increases and deformation progresses when a load is continuously applied to a material. It generally occurs in plastic materials at room temperature but in metallic materials at high temperatures.
The creep phenomenon causes deformation and rupture of the material, affecting product failure. Estimating material life by understanding the creep phenomenon is also essential for quality control.
The suppression of creep phenomena is a common issue for any product that uses plastic products. Gaskets are one of the products that are particularly affected.
Gaskets are a sealing material that fixes the joints between pipes. Gaskets are often used in equipment through which fluids pass, including plant piping.
Since pressure is applied to the gasket part, the sealing performance may decrease due to the creep phenomenon. To prevent the reduction of sealing, PTFE resin, which is less likely to cause the creep phenomenon, is used, or the gasket is used under conditions where the phenomenon is unlikely to occur from the measurement.
The creep phenomenon is affected by the viscoelasticity of resins.
Viscosity is a property in which strain increases when an external force is applied to an object, and the strain does not disappear even when the external force is removed. Viscosity is a liquid-like property.
Elasticity is a solid-like property. Elasticity is a property in which a certain amount of strain is generated when an external force is applied to an object. The strain disappears when the external force is removed.
Viscoelasticity is the combination of liquid and solid properties, with an increase in strain when an external force is applied and a partial loss of strain when the external force is removed.
Understanding creep phenomena is vital in product control, but measurement presents challenges.
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