scholarly journals Pengaruh Multiple Damages Struktur Kapal Berbahan Sandwich Panel Menggunakan Respon Getaran

Techno Bahari ◽  
2021 ◽  
Vol 7 (2) ◽  
Author(s):  
Windra Iswidodo ◽  
Anauta Lungiding Angga Risdianto ◽  
Anauta Lungiding Angga Risdianto
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Sandwich Panel ◽  
Core Material ◽  
Element Modeling

Saat ini banyak terobosan baru dalam teknologi material, salah satunya adalah penggunaan material Sandwich Panel untuk konstruksi kapal. Sandwich Panel merupakan material ringan yang terdiri dari dua pelat baja yang dipisahkan oleh bagian inti (core). Material Sandwich Panel pada kapal akan mendapat gaya berulang dari luar, hal tersebut akan memicu adanya retak dan kemudian dapat menyebabkan kegagalan pada material. Analisa dengan Finite Element Modeling dilakukan untuk validasi kekuatan material Sandwich Panel. Selanjutnya, akan dilakukan identifikasi dampak multiple damages melalui pendekatan karakteristik getaran dengan metode ekperimen dan analisa finite elemen. Berdasarkan hasil penelitian, pengaruh cacat pada material inti Sandwich Panel berdasarkan hasil eksperimen terjadi penurunan rata-rata frekuensi natural sebesar 1,64 persen.

A Study of Hybrid Composite Sandwich Beam

2019 ◽  
Author(s):  
Shah Alam ◽  
Guoqiang Li
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Experimental Results ◽  
Core Material ◽  
Sandwich Beams ◽  
Premature Failure ◽  
Element Modeling ◽  
Composite Sandwich ◽  
The Core ◽  
Linear Variable Displacement Transducer

Abstract This study presents the testing and numerical modeling results of composite sandwich beams. The sandwich beams are constructed from balsa wood in the core and high strength steel wire and E-glass fiber reinforced polymer composite in the facings. The testing of these beams is performed using a monotonic static four-point loading to failure in accordance with ASTM C393-00. Local strain distribution in the mid-span of the beams is obtained using strain gauges. Mid-span deflections of the beams are real-time measured using linear variable displacement transducer (LVDT). From the experimental results, flexural properties of the beams are calculated, including bending stiffness, bending strength, core shear strength, and facing modulus, core modulus, etc. The experimental results have shown that the beams have all failed in the compression zone by local buckling of the top face and shear of the core. The bottom skin does not exhibit any type of premature failure or distress. No bond failure of the composite in the tension zone is observed in any of the tested beams. Finite element modeling of the beam has been conducted using ANSYS. The mechanical properties of the skin and core material used in finite element modeling have been determined by testing of coupons. The predicted results are compared to experimental results, with a reasonable agreement.

Exact First Order Finite Element Modeling for Eddy Current NDE

1991 ◽  
Vol 3 (1) ◽  
pp. 235-253 ◽  
Author(s):  
L. D. Philipp ◽  
Q. H. Nguyen ◽  
D. D. Derkacht ◽  
D. J. Lynch ◽  
A. Mahmood
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Eddy Current ◽  
Element Modeling ◽  
First Order ◽  
Eddy Current Nde

Tire Vibration Modes and Effects on Vehicle Ride Quality

1993 ◽  
Vol 21 (1) ◽  
pp. 23-39 ◽  
Author(s):  
R. W. Scavuzzo ◽  
T. R. Richards ◽  
L. T. Charek
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Operating Conditions ◽  
Modal Testing ◽  
Ride Quality ◽  
Vibration Modes ◽  
Inflation Pressure ◽  
Passenger Cars ◽  
Element Modeling ◽  
Road Surfaces

Abstract Tire vibration modes are known to play a key role in vehicle ride, for applications ranging from passenger cars to earthmover equipment. Inputs to the tire such as discrete impacts (harshness), rough road surfaces, tire nonuniformities, and tread patterns can potentially excite tire vibration modes. Many parameters affect the frequency of tire vibration modes: tire size, tire construction, inflation pressure, and operating conditions such as speed, load, and temperature. This paper discusses the influence of these parameters on tire vibration modes and describes how these tire modes influence vehicle ride quality. Results from both finite element modeling and modal testing are discussed.

Evolving the Banded Radial Tire

1987 ◽  
Vol 15 (1) ◽  
pp. 30-41 ◽  
Author(s):  
E. G. Markow
Keyword(s):  
Finite Element ◽  
Wear Rate ◽  
Finite Element Modeling ◽  
Laboratory Tests ◽  
Rolling Resistance ◽  
Two Dimensional ◽  
Theoretical Discussion ◽  
Radial Tire ◽  
Puncture Resistance ◽  
Element Modeling

Abstract Development of the banded radial tire is discussed. A major contribution of this tire design is a reliable run-flat capability over distances exceeding 160 km (100 mi). Experimental tire designs and materials are considered; a brief theoretical discussion of the mechanics of operation is given based on initial two-dimensional studies and later on more complete finite element modeling. Results of laboratory tests for cornering, rolling resistance, and braking are presented. Low rolling resistance, good cornering and braking properties, and low tread wear rate along with good puncture resistance are among the advantages of the banded radial tire designs.

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