Transverse Impact Damage and Energy Absorption of Three-Dimensional Orthogonal Hybrid Woven Composite: Experimental and FEM Simulation

2008 ◽  
Vol 42 (17) ◽  
pp. 1763-1786 ◽  
Author(s):  
Lihua Lv ◽  
Bohong Gu
Keyword(s):  
Energy Absorption ◽  
Impact Damage ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Woven Composite ◽  
Transverse Impact

Multiple transverse impact damage behaviors of 3-D-braided composite beams under room and high temperatures

2019 ◽  
Vol 29 (5) ◽  
pp. 715-747
Author(s):  
Meiqi Hu ◽  
Shengkai Liu ◽  
Junjie Zhang ◽  
Lei Wang ◽  
Baozhong Sun ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Impact Damage ◽  
Three Dimensional ◽  
Composite Beams ◽  
Transverse Impact ◽  
Engineering Structure ◽  
Braided Composite ◽  
Impact Deformation ◽  
Initial Modulus ◽  
The Impact

Three-dimensional braided composite materials have been widely applied to engineering structure manufacturing. It is of a great importance to characterize the impact damage of the three-dimensional braided composite under various temperatures for optimizing the engineering structure. Here we conducted transverse impact deformation and damage of three-dimensional braided composite beams with different braiding angles at room and elevated temperatures. A split Hopkinson pressure bar with a heating device combined with high-speed camera was employed to test multiple transverse impact behaviors and to record the impact deformation developments. The results indicated that failure load, initial modulus, and energy absorption decreased with the increase of temperature, whereas the deformation increased slightly with elevated temperatures. We found that the impact brittle damages occurred earlier and the local adiabatic temperature raised higher when the temperature is lower than the glass transition temperature (Tg) of epoxy resin. While above the Tg, the impact ductile damages occurred later and the local temperature raised lower. The thermal stress distribution along the braiding yarn leads to cracks propagation in yarn direction. Part of the impact energy absorptions converted into thermal energy. In addition, the beam with larger braiding angle has high damage tolerance and crack propagation resistance.

Transverse impact behavior and energy absorption of three-dimensional orthogonal hybrid woven composites

2007 ◽  
Vol 81 (2) ◽  
pp. 202-209 ◽  
Author(s):  
Yunsong Luo ◽  
Lihua Lv ◽  
Baozhong Sun ◽  
Yiping Qiu ◽  
Bohong Gu
Keyword(s):  
Energy Absorption ◽  
Three Dimensional ◽  
Impact Behavior ◽  
Woven Composites ◽  
Transverse Impact

Ballistic Penetration Damage of 2D Basalt Fiber Plain Woven Composite

2012 ◽  
Vol 487 ◽  
pp. 530-533 ◽  
Author(s):  
Zhi Lin Niu ◽  
Li Min Jin ◽  
Li Juan Yu ◽  
Bao Zhong Sun ◽  
Ping Chen ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Impact Damage ◽  
Basalt Fiber ◽  
Velocity Curve ◽  
Dissipated Energy ◽  
Woven Composite ◽  
Residual Velocity ◽  
Penetration Behavior ◽  
The Impact ◽  
Ballistic Penetration

This paper reports the ballistic penetration behavior of 2D basalt fiber plain woven composite (2DPWC). The residual velocity vs. strike velocity curve was recorded. The dissipated energy was also calculated for each strike velocity. Furthermore, the impact damage morphologies of the tested 2DPWC coupons were given to indicate the damage modes and the mechanisms of energy absorption.

THREE DIMENSIONAL FEM SIMULATION OF TITANIUM HOLLOW MONOLITHIC STRUCTURE PROCESS BASED ON VISCO--PLASTIC CONSTITUTIVE

2010 ◽  
Vol 46 (4) ◽  
pp. 396-403
Author(s):  
Bing ZHAO ◽  
Zhiqiang LI ◽  
Xiuquan HAN ◽  
Jinhua LIAO ◽  
Hongliang HOU ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Fem Simulation ◽  
Monolithic Structure

Numerical and experimental investigation for enhancing the energy absorption capacity of the novel three-dimensional printed sandwich structures

2021 ◽  
pp. 146442072199749
Author(s):  
H Geramizadeh ◽  
S Dariushi ◽  
S Jedari Salami
Keyword(s):  
Energy Absorption ◽  
Sandwich Structures ◽  
Three Dimensional ◽  
Absorption Capacity ◽  
The Novel ◽  
Energy Absorption Capacity ◽  
Fused Deposition ◽  
Honeycomb Sandwich ◽  
Out Of Plane ◽  
Vertical Walls

The current study focuses on designing the optimal three-dimensional printed sandwich structures. The main goal is to improve the energy absorption capacity of the out-of-plane honeycomb sandwich beam. The novel Beta VI and Alpha VI were designed in order to achieve this aim. In the Beta VI, the connecting curves (splines) were used instead of the four diagonal walls, while the two vertical walls remained unchanged. The Alpha VI is a step forward on the Beta VI, which was promoted by filleting all angles among the vertical walls, created arcs, and face sheets. The two offered sandwich structures have not hitherto been provided in the literature. All models were designed and simulated by the CATIA and ABAQUS, respectively. The three-dimensional printer fabricated the samples by fused deposition modeling technique. The material properties were determined under tensile, compression, and three-point bending tests. The results are carried out by two methods based on experimental tests and finite element analyses that confirmed each other. The achievements provide novel insights into the determination of the adequate number of unit cells and demonstrate the energy absorption capacity of the Beta VI and Alpha VI are 23.7% and 53.9%, respectively, higher than the out-of-plane honeycomb sandwich structures.

Theoretical Analysis and FEM Simulation of Piezoelectric Vibrator Used in Ultrasonic EDM System

2013 ◽  
Vol 694-697 ◽  
pp. 3020-3024
Author(s):  
Hong Bing Wang ◽  
Zhi Rong Li ◽  
Chun Hua Sun
Keyword(s):  
Theoretical Analysis ◽  
Natural Frequencies ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Model Analysis ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Piezoelectric Vibrator ◽  
Working Frequency

The dynamic performance of the piezoelectric vibrator used in ultrasonic EDM machine in natural frequencies has a great effect on machining precision. Firstly, Through theoretical analysis the dynamic characteristics of the piezoelectric vibrator is obtained. Then the three-dimensional model of the piezoelectric vibrator is constructed by using PRO/E software, and model analysis is carried by using FEM software. Through theoretical analysis and FEM simulation, the appropriate working frequency and mode of the piezoelectric vibrator was found, and the piezoelectric vibrator was fabricated. Experimented results show that the model analysis of frequency is accord with that of FEM.

FEM Simulation Analysis of Cross Wedge Rolling Process

2011 ◽  
Vol 381 ◽  
pp. 72-75
Author(s):  
Bin Li
Keyword(s):  
Simulation Analysis ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Rolling Process ◽  
Stress Distributions ◽  
Cross Wedge Rolling ◽  
Forming Process ◽  
Pressure Distributions ◽  
Metal Forming Process ◽  
Rolling Load

This paper investigates the interfacial slip between the forming tool and workpiece in a relatively new metal forming process, cross-wedge rolling. Based on the finite elements method, three-dimensional mechanical model of cross wedge rolling process has been developed. Examples of numerical simulation for strain, stress distributions and rolling load components have been included. The main advantages of the finite element method are: the capability of obtaining detailed solutions of the mechanics in a deforming body, namely, stresses, shapes, strains or contact pressure distributions; and the computer codes, can be used for a large variety of problems by simply changing the input data.

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