scholarly journals Mechanical response and energy dissipation characteristics of granite under low velocity cyclic impact

2021 ◽  
Vol 781 (4) ◽  
pp. 042043
Author(s):  
Nan Hu ◽  
Changhong Li ◽  
Yonggang Xiao ◽  
Zhiqiang Hou ◽  
Chen Qiao
Keyword(s):  
Energy Dissipation ◽  
Mechanical Response ◽  
Low Velocity ◽  
Cyclic Impact

Numerical Investigation of a Stiffened Panel Subjected to Low Velocity Impacts

2015 ◽  
Vol 665 ◽  
pp. 277-280 ◽  
Author(s):  
Aniello Riccio ◽  
S. Saputo ◽  
A. Sellitto ◽  
A. Raimondo ◽  
R. Ricchiuto
Keyword(s):  
Numerical Investigation ◽  
Composite Laminates ◽  
Mechanical Response ◽  
Numerical Study ◽  
Fem Analysis ◽  
Matrix Cracking ◽  
Stiffened Panel ◽  
Low Velocity ◽  
Formation And Evolution ◽  
The Impact

The investigation of fiber-reinforced composite laminates mechanical response under impact loads can be very difficult due to simultaneous failure phenomena. Indeed, as a consequence of low velocity impacts, intra-laminar damage as fiber and matrix cracking and inter-laminar damage, such as delamination, often take place concurrently, leading to significant reductions in terms of strength and stability for composite structure. In this paper a numerical study is proposed which, by means of non-linear explicit FEM analysis, aims to completely characterize the composite reinforced laminates damage under low velocity impacts. The numerical investigation allowed to obtain an exhaustive insight on the different phases of the impact event considering the damage formation and evolution. Five different impact locations with the same impact energy are taken into account to investigate the influence on the onset and growth of damage.

scholarly journals Research on the Response Characteristics of Bio-Inspired Composite Sandwich Structure under Low Velocity Impact

2021 ◽  
Vol 2101 (1) ◽  
pp. 012087
Author(s):  
Peng Hao ◽  
Lin’an Li ◽  
Jianxun Du
Keyword(s):  
Sandwich Structure ◽  
Mechanical Response ◽  
Shear Fracture ◽  
Impact Load ◽  
High Energy ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Response Characteristics ◽  
Composite Sandwich ◽  
The Impact

Abstract In order to research the impact mechanical response characteristics of the bio-inspired composite sandwich structure, the hemispherical impactor is preloaded with different energy to impact bio-inspired and conventional composite sandwich structure, the stress distribution and dynamic response characteristics of composite sandwich structure under impact load are studied. The results show that the main damage of the upper panel is fiber shear fracture, while crushing fracture for the core, and the main damage of the lower panel is fiber tensile tearing under different impact load. The bio-inspired composite sandwich structure shows better impact resistance in terms of damage depth and maximum impact load under the same impact energy. From the perspective of energy consumption, the bio-inspired structure absorbed more energy than conventional structure under high energy impact.

scholarly journals Characteristics of Energy Dissipation in the Process of Rock Damage under Cyclic Impact

2021 ◽  
Vol 14 (1) ◽  
pp. 71-78
Author(s):  
N. Hu ◽  
C. Li ◽  
E. Boda ◽  
Y. Xiao ◽  
Z. Hou
Keyword(s):  
Energy Dissipation ◽  
Rock Damage ◽  
Cyclic Impact

Characterization of Multi-Phase and Multi-Component Polymer Systems Using the Atomic Force Microscope

1999 ◽  
Vol 5 (S2) ◽  
pp. 962-963
Author(s):  
M. VanLandingham ◽  
X. Gu ◽  
D. Raghavan ◽  
T. Nguyen
Keyword(s):  
Energy Dissipation ◽  
Atomic Force Microscope ◽  
Mechanical Response ◽  
Sample Surface ◽  
Phase Changes ◽  
Phase Imaging ◽  
Polymer Systems ◽  
Atomic Force ◽  
Phase Images ◽  
Multi Phase

Recent advances have been made on two fronts regarding the capability of the atomic force microscope (AFM) to characterize the mechanical response of polymers. Phase imaging with the AFM has emerged as a powerful technique, providing contrast enhancement of topographic features in some cases and, in other cases, revealing heterogeneities in the polymer microstructure that are not apparent from the topographic image. The enhanced contrast provided by phase images often allows for identification of different material constituents. However, while the phase changes of the oscillating probe are associated with energy dissipation between the probe tip and the sample surface, the relationship between this energy dissipation and the sample properties is not well understood.As the popularity of phase imaging has grown, the capability of the AFM to measure nanoscale indentation response of polymers has also been explored. Both techniques are ideal for the evaluation of multi-phase and multi-component polymer systems.

scholarly journals Time-dependent and energy dissipation effects on the electro-mechanical response of PZTs

2016 ◽  
Vol 102 ◽  
pp. 74-89 ◽  
Author(s):  
Kamran A. Khan ◽  
Anastasia H. Muliana ◽  
Hassene Ben Atitallah ◽  
Zoubeida Ounaies
Keyword(s):  
Energy Dissipation ◽  
Mechanical Response ◽  
Time Dependent

The Forced Lateral Oscillations of Trailers

1957 ◽  
Vol 24 (4) ◽  
pp. 515-519
Author(s):  
A. Slibar ◽  
P. R. Paslay
Keyword(s):  
Natural Frequency ◽  
Periodic Motion ◽  
Mechanical Response ◽  
Equations Of Motion ◽  
Simplified Model ◽  
Low Velocity ◽  
Velocity Amplitude ◽  
Analytical Expressions

Abstract This paper gives the mechanical response of a simplified model of a trailer when its tow point moves along a certain prescribed path. The type of path considered here is described by a constant forward velocity on which is superimposed a low-velocity-amplitude, sidewise, periodic motion. In this investigation analytical expressions proposed by Huber (3) were used for the forces and moments on the tires. The equations of motion are studied for small slip angles. The analysis leads to a prediction of the natural frequency of the trailer and shows that the damping of the system due to slip of the tires is inversely proportional to the forward velocity of the trailer.

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