Simulation of drop-weight impact and compression after impact tests on composite laminates

2012 ◽  
Vol 94 (11) ◽  
pp. 3364-3378 ◽  
Author(s):  
E.V. González ◽  
P. Maimí ◽  
P.P. Camanho ◽  
A. Turon ◽  
J.A. Mayugo
Keyword(s):  
Composite Laminates ◽  
Impact Tests ◽  
Drop Weight ◽  
Compression After Impact ◽  
Weight Impact

scholarly journals Simulating drop-weight impact and compression after impact tests on composite laminates using conventional shell finite elements

2018 ◽  
Vol 144-145 ◽  
pp. 230-247 ◽  
Author(s):  
E.V. González ◽  
P. Maimí ◽  
E. Martín-Santos ◽  
A. Soto ◽  
P. Cruz ◽  
...  
Keyword(s):  
Finite Elements ◽  
Composite Laminates ◽  
Impact Tests ◽  
Drop Weight ◽  
Compression After Impact ◽  
Weight Impact

scholarly journals 3D Progressive Failure Modeling of Drop-Weight Impact on Composite Laminates

2018 ◽  
Author(s):  
DC Pham
Keyword(s):  
Composite Laminates ◽  
Impact Damage ◽  
Progressive Failure ◽  
Damage Model ◽  
Matrix Cracking ◽  
Structural Level ◽  
Velocity Impact ◽  
Drop Weight ◽  
Weight Impact ◽  
The Impact

Composite laminates are susceptible to out-of-plane impact loads due to the lack of reinforcement in the through-thickness direction. Unlike the localized damage induced by a high velocity impact where the incident energy is dissipated near a contact area, low velocity impact damage involves multiple failure mechanisms such as matrix cracking, fiber breakage, and widespread interface delaminations. Depending on the extent of damage, significant reduction in the load-bearing capability of the structure has been observed. The prediction of composite impact damage resistance by a reliable progressive damage analysis tool is essential to reduce intensive and expensive certification tests at structural level. In this work, an enhanced explicit 3D damage model is implemented via VUMAT in Abaqus to perform a drop-weight impact simulation of a [454/04/-454/904]s Hexply AS4/8552 composite laminate. The impact-induced damage and its extent are captured by a 3D Continuum Damage Model (CDM) coupled with an energy driven failure mechanism. The developed module provides a unified solution process for the impact response prediction followed by the residual strength prediction under compression within an explicit solver. Two examples are selected to demonstrate the capability of the progressive failure analysis under dynamic and static loading: 1) a drop-weight test; and 2) an open-hole tension test. Numerical predictions from the developed VUMAT are compared with the test data and predictions using the open source CompDam code developed by NASA.

Numerical and experimental investigation of simply supported steel beams under drop‐weight impact tests

ce/papers ◽  
2019 ◽  
Vol 3 (3-4) ◽  
pp. 803-809
Author(s):  
Marina D'Antimo ◽  
Massimo Latour ◽  
Jean‐Pierre Jaspart ◽  
Jean‐François Demonceau
Keyword(s):  
Experimental Investigation ◽  
Steel Beams ◽  
Simply Supported ◽  
Impact Tests ◽  
Drop Weight ◽  
Weight Impact

scholarly journals Analysis of Impact Characteristics and Detection of Internal Defects for Unidirectional Carbon Composites with Respect to Fiber Orientation

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 203
Author(s):  
Sun-ho Go ◽  
Alexandre Tugirumubano ◽  
Hong-gun Kim
Keyword(s):  
Carbon Fiber ◽  
Impact Test ◽  
Carbon Fiber Composites ◽  
Internal Defects ◽  
Impact Tests ◽  
Drop Weight ◽  
Weight Impact ◽  
Fibers Orientation ◽  
Lock In ◽  
The Impact

With the increasing use of carbon fiber reinforced plastics in various fields, carbon fiber composites based on prepregs have attracted attention in industries and academia research. However, prepreg manufacturing processes are costly, and the strength of structures varies depending on the orientation and defects (pores and delamination). For the non-contact evaluation of internal defects, the lock-in infrared thermography was proposed to investigate the defects in the composites subjected to the compression after impact test (CAI). The drop-weight impact test was conducted to study the impact behavior of the composites according to fibers orientation for composite fabricated using unidirectional (UD) carbon fiber prepregs. Using CAI tests, the residual compressive strengths were determined, and the damage modes were detected using a thermal camera. The results of the drop weight impact tests showed that the specimen laminated at 0° suffered the largest damage because of susceptibility of the resin to impact. The specimens with 0°/90° and +45°/−45° fibers orientation exhibited more than 90% of the impact energy absorption and good impact resistance. Furthermore, the specimens that underwent the impact tests were subjected to compressive test simultaneously with the lock-in thermography defects detection. The results showed that internal delamination, fibers splitting, and broken fibers occurred. The temperature differences in the residual compression tests were not significant.

A three-dimensional progressive damage model for drop-weight impact and compression after impact

2019 ◽  
Vol 54 (4) ◽  
pp. 449-462 ◽  
Author(s):  
Dinh Chi Pham ◽  
Jim Lua ◽  
Haotian Sun ◽  
Dianyun Zhang
Keyword(s):  
Impact Analysis ◽  
Damage Model ◽  
Three Dimensional ◽  
Matrix Cracking ◽  
Progressive Damage ◽  
Continuum Damage ◽  
Drop Weight ◽  
Compression After Impact ◽  
Weight Impact ◽  
Progressive Damage Model

In this paper, an enhanced three-dimensional continuum damage mechanics model is applied to predict the drop-weight impact response and compression after impact failure of a fiber-reinforced polymer composite specimen. The three-dimensional progressive damage model incorporates a three-dimensional maximum stress criterion to predict the intra-ply damage initiation, followed by a fracture-energy-based smeared crack model to capture the post-peak softening behavior. Driven by the dominant through-the-thickness failure under impact loading, a three-dimensional continuum damage model is implemented for the three-dimensional solid element via its explicit material model for Abaqus (VUMAT) to capture the effect of three-dimensional stress state and the interaction of matrix cracking and delamination. Abaqus’ restart analysis capability is used to activate the compression after impact analysis using the final damage state from the dynamic impact analysis. Both the dynamic failure and the compression after impact are demonstrated via a suite of verification examples followed by the sensitivity analysis using distinct impact configurations. The predictive capability of the proposed three-dimensional damage model is first verified using a static open-hole tension test. Applications of the damage model are then demonstrated for simulations of the dynamic drop-weight tests and compression after impact tests. A comparative study on the developed method is performed using the results predicted from the open-source CompDam. A sensitivity study is also performed to demonstrate the impact energy-dependent failure mode. The proposed model has shown its advantages in performing a quick assessment of impact damage and its effects on the residual compressive strength.

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