Related Experiment Video
Updated: Sep 29, 2025
11:05
Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes
Published on: December 13, 2016
12.3K
The Fatigue Wear Process of Rubber-Metal Shock Absorbers
Marcin Kluczyk1, Andrzej Grządziela1, Michał Pająk2
1Mechanical and Electrical Engineering Faculty, Polish Naval Academy in Gdynia, 81-127 Gdynia, Poland.
Polymers
|March 26, 2022
Summary
This study investigates how petroleum products and overload affect marine rubber-metal vibration isolators. Results show material degradation impacting shock absorber performance in harsh marine environments.
Area of Science:
- Materials Science
- Mechanical Engineering
- Naval Architecture
Background:
- Marine vibration isolators are crucial for supporting loads and isolating shocks.
- Environmental factors like temperature and petroleum product exposure degrade isolator materials.
- Understanding material behavior under stress is vital for naval applications.
Purpose of the Study:
- To evaluate the impact of overload and petroleum products on metal-rubber shock absorbers.
- To assess the performance of different rubber and polyurethane materials under marine conditions.
- To determine the influence of material hardness on shock absorber resilience.
Main Methods:
- Testing metal-rubber shock absorbers made from three distinct rubber types and one polyurethane mixture.
- Subjecting shock absorbers to varying degrees of hardness.
- Analyzing the effects of petroleum product exposure and overload conditions.
Main Results:
- Petroleum products and overload significantly alter the physical properties of the tested materials.
- Material degradation was observed, affecting the damping and stiffness characteristics.
- Hardness influenced the material's resistance to environmental degradation and overload.
Conclusions:
- The selection of marine vibration isolators must consider resistance to petroleum products and temperature fluctuations.
- Material choice and hardness are critical factors in ensuring shock absorber longevity and performance.
- Further research is needed to develop robust materials for demanding marine environments.
Related Concept Videos
01:21Fatigue
268
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
268
01:21Rolling Resistance
372
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down...
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down...
372
01:30Dry Friction
482
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
482
01:22Fatigue Strength of Concrete
309
Fatigue, in the context of materials science and engineering, refers to the weakening or failure of a material caused by repeatedly applied loads, even if these loads are below the strength limit of the material. Fatigue strength in concrete is a critical property that influences its durability and longevity. Concrete can fail in two ways due to fatigue. Static fatigue or creep rupture occurs under a constant load or one that increases slowly. The other failure mode is due to cyclical or...
309
01:24Circular Shafts - Elastoplastic Materials
205
The study of solid circular shafts under stress shows that within the elastic limit, stress increases directly to the distance from the shaft's center. This relationship holds until the shaft reaches a critical point of stress, beyond which it begins to yield, marking the transition from elastic to plastic deformation. At this crucial juncture, the maximum torque the shaft can endure without permanent deformation is determined, signifying the limit of its elastic behavior.
As torque on the...
As torque on the...
205
01:18Residual Stresses in Bending
285
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
285