Braided carbon fiber reinforced plastics (CFRPs) can be employed in the construction of pressurized vessels to increase performance and reduce overall weight. However, owing to the complex braiding structures resulting from the braiding process, an analysis of the elastic modulus is important as it affects the hoop stress on the pressure vessel. In this study, braided preformed CFRP constructed on a steel cylinder subjected to internal pressure was experimentally investigated using a simple approach that involved estimating the elastic modulus and hoop stress. Five types of braided preformed CFRP with different braiding angles and number of applied layers were analyzed. The elastic modulus and hoop stress can be estimated from these measurements of the internal pressure. The differences in the braided structures result in different strain values and affect the elastic modulus. High braiding angles tend to be more stable against high internal pressure, and exhibit small strain differences and high elastic modulus in the hoop direction. Similar results were observed when additional layers were applied. Increasing the braiding angle and the number of layers can increase the average elastic modulus.

The aim of the study was to analyze the dynamic response along an aluminum cantilever beam. The data measured were displacement (mm), velocity (mm / s), and acceleration (m/s2) with 3 variations of the measurement position on the beam. The 6061 series aluminum beam used have length: 80 cm, height: 32 cm, and width: 32 cm. Data were collected experimentally using a vibration meter to measure beam vibrations at the various positions from the cantilever beam at a distance from support: 10 cm, 35 cm, and 60 cm. The results of the analysis showed that the values ​​of the displacement, velocity and acceleration of the object vibrations change when the measuring point was far from the cantilever support. The maximum displacement value is at 60 cm from the support: 0.02 mm, and the lowest is at 10 cm: 0.12 mm. The velocity value also increases, maximum at 60 cm from the support: 38.58 mm/s and the minimum value at 10 cm: 12.30 mm/s. While the acceleration value, the maximum at 60 cm from the support: 91150 mm/s2 and the minimum at 10 cm: 66900 mm/s2.

Penelitian ini bertujuan untuk menganalisis pengaruh fraksi volume terhadap kekuatan tarik dan densitas bahan komposit serat pelepah pisang–epoksi.  Salah satu faktor yang sangat penting dalam menentukan karakteristik material komposit adalah fraksi volume antara matriks dan serat. Penelitian ini menggunakan serat pelepah pisang kepok (Musa Paradisiaca) karena memiliki bahan baku yang melimpah dan ramah lingkungan. Pengujian kekuatan tarik dilakukan dengan spesimen yang disesuaikan dengan standar ASTM 638-02. Bahan uji komposit dibagi menjadi 3 fraksi volume, yaitu  20 %, 30% dan 40%. Hasil penelitian ini menunjukan bahwa densitas terendah berada pada komposit dengan fraksi volume 40 % ( rmin 1,08 gr/cm3 ), sedangkan densitas tertinggi terdapat pada fraksi volume 20 % serat (rmaks 1,38 gr/cm3). Untuk pengujian tarik, nilai kekuatan maksimum tertinggi berada pada komposit dengan fraksi volume 40% ( σmax 32,27 N/mm2), sedangkan nilai kekuatan minimum berada pada posisi komposit dengan fraksi volume 20% ( σmin 28,27 N/mm2).