**3. Principle approach for material selection**

The proper material choice for an envisaged application is of outstanding importance and key in the development of a new product. Selecting the most suitable material determines the performance of the final product—whether it will meet the designated function and performance requirements. Inappropriate, less suitable materials can cause the following impairments:


Material selection is a multifaceted, complex process, which needs to address various factors such as:


the onset of the final destruction. As it is visible from the S-N curve of fatigue properties, fatigue strength of the majority of metallic materials amounts to only 30–50% of tensile strength, while this value increases to 70–80% for carbon fiber/polyester composites; for glass

**Table 1.** Specific strength and specific modulus of some commonly used materials and fiber composites [10].

The natural vibration frequency of forced structures relates to the structure shape itself and is also proportional to the square root of the specific modulus of structural materials. Consequently, composites have a high natural frequency, and generation of a resonance in general is not easy. In parallel, the fiber/matrix interface in composites very easily absorbs vibrational energy, which results in a high vibration damping of these materials. In case

○ Fiber matrix and other raw materials can be selected according to the utilization conditions and performance requirements of the product; hence, tailor-made material can be

○ Molding processing techniques can be applied according to the size, shape, and number

○ Integrated molding can decrease the number of individual parts, which saves time and

The proper material choice for an envisaged application is of outstanding importance and key in the development of a new product. Selecting the most suitable material determines

fiber composites, the percentage is between these two examples.

**3.** Good damping characteristics

8 Characterizations of Some Composite Materials

**4.** Useful processing techniques

designed on demand.

material and reduces weight.

**3. Principle approach for material selection**

of the product.

vibrations occur, they can easily be stopped [10].


The functionality of the product (based on its individual components), structure (its shape), material, and technology closely interacts and cannot be regarded independently from each other; consequently, the selection of material cannot be done independently of the technology.

