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Relaxation

Relaxation은 고무에 일정한 변형률이 가해지면변형률을 유지하기 위해 필요한 힘은 일정하지는 않지만 시간에 따라 감소합니다이러한 특성을 응력 완화라고 부릅니다응력완화의 원인이 되는 과정은 물리적 또는 화학적 그리고 정상적인 조건 하에둘 다 동시에 일어날 수 있습니다

How to Determine if a Physical or a Chemical Process is responsible for the Relaxation?

At normal or low temperatures and/or at short time applying StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress, the StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress relaxation is dominated by physical processes. At high temperatures and/or at long time applying StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress, it is dominated by chemical processes. The figure below presents a curve, showing the StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress applied and its relaxation over time.

The StressStress is defined as a level of force applied on a sample with a well-defined cross section. (Stress = force/area). Samples having a circular or rectangular cross section can be compressed or stretched. Elastic materials like rubber can be stretched up to 5 to 10 times their original length.stress relaxation can be measured with the NETZSCH DMA Eplexor® and DMA 242 Artemis.

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