scholarly journals On Evaluation Method of Damage Development for CFRP Laminates under Low Impact Energy (1st Report, Estimation of Residual Strength based on Static Bending Test after Occurrence of Damage)

2005 ◽  
Vol 71 (704) ◽  
pp. 656-662
Author(s):  
Tetsusei KURASHIKI ◽  
Masaru ZAKO ◽  
Tokinari KEYAKIDA
Keyword(s):  
Impact Energy ◽  
Residual Strength ◽  
Evaluation Method ◽  
Bending Test ◽  
Damage Development ◽  
Cfrp Laminates ◽  
Strength Based

Out-of-plane tensile modulus of CFRP laminates by 3-point bending test

2014 ◽  
Vol 24 (3) ◽  
pp. 221-237 ◽  
Author(s):  
Eiichi Hara ◽  
Tomohiro Yokozeki ◽  
Hiroshi Hatta ◽  
Yutaka Iwahori ◽  
Takashi Ishikawa
Keyword(s):  
Tensile Modulus ◽  
Bending Test ◽  
Cfrp Laminates ◽  
Out Of Plane

Damage Development in CFRP Laminates under Impact Loading

2006 ◽  
Vol 326-328 ◽  
pp. 1833-1836 ◽  
Author(s):  
Seung Min Jang ◽  
Tadaharu Adachi ◽  
Akihiko Yamaji
Keyword(s):  
Impact Damage ◽  
Stacking Sequence ◽  
Absorbed Energy ◽  
Damage Development ◽  
Damage Resistance ◽  
Cfrp Laminates ◽  
Impact Tester ◽  
Weight Impact ◽  
The Impact ◽  
Delamination Area

The development characteristics of impact-induced damage in carbon-fiber-reinforcedplastics (CFRP) laminates were experimentally studied using a drop-weight impact tester. Five types of CFRP laminates were used to investigate the effect of stacking sequences and thicknesses. The efficiency of absorbed energy to impact energy was different for CFRP laminates with different stacking sequences or thicknesses. The DA/AE ratio of delamination area (DA) to absorbed energy (AE) was almost the same for CFRP laminates with the same stacking sequence regardless of the thickness. We found that the DA/AE ratio could be used as a parameter to characterize the impact damage resistance in CFRP laminates with different stacking sequences.

Dynamic Fracture Analysis of Aluminum Honeycomb Sandwich Panel

2006 ◽  
Vol 306-308 ◽  
pp. 67-72 ◽  
Author(s):  
Byung Il Kim ◽  
Byeong Wook Noh ◽  
Young Woo Choi ◽  
Sung In Bae ◽  
Jung I. Song
Keyword(s):  
Impact Energy ◽  
Sandwich Panel ◽  
Bending Test ◽  
Face Sheet ◽  
Impact Behavior ◽  
Lower Face ◽  
Short Edge ◽  
Edge Direction ◽  
Aluminum Honeycomb ◽  
The Impact

Impact behaviors of Aluminum Honeycombs Sandwich Panel (AHSP) by drop weight test were investigated in this study. Two types of specimens with l/2" and l/4" cell size were tested by two impactors with the weight of 5.25kgf and 11.9kgf respectively. Transient, contact and elastic-plastic analyses were performed by finite element method. Impact behavior of AHSP about impact sites appeared nearly the same in low impact energy, but it was different in high impact energy. Face was the strongest about impact and short-edge was the weakest. The damaged area of AHSP was enlarged with the increase of impactor weight that is corresponding to impact energy. After 3-point bending test, fracture modes of AHSP were analyzed with AE counts, lower face sheet was fractured in the long-edge direction first, and then separation between face sheet and core happened. In the short-edge direction after core wrinkled, lower face sheet was torn, impact behavior by FE analysis were increased localized damage in high velocity because the faster velocity of the impact was, the smaller the stress of core was. Consequently, impactor weight had an effect on widely damaged area, while the impact velocity gave rise to localized damaged area.

scholarly journals Evaluation of Interlaminer Fracture Toughness of Cross-ply CFRP Laminates Using Mixed Mode Bending Test

2004 ◽  
Vol 70 (698) ◽  
pp. 1356-1363 ◽  
Author(s):  
Masahiro ARAI ◽  
Toru TAKAGI ◽  
Toshikazu KUWABARA ◽  
Tadaharu ADACHI
Keyword(s):  
Fracture Toughness ◽  
Mixed Mode ◽  
Bending Test ◽  
Cfrp Laminates

scholarly journals Out-of-Plane Tensile Modulus of CFRP Laminates by 3-Point Bending Test

2013 ◽  
Vol 39 (5) ◽  
pp. 184-192 ◽  
Author(s):  
Eiichi HARA ◽  
Tomohiro YOKOZEKI ◽  
Hiroshi HATTA ◽  
Yutaka IWAHORI ◽  
Takashi ISHIKAWA
Keyword(s):  
Tensile Modulus ◽  
Bending Test ◽  
Cfrp Laminates ◽  
Out Of Plane
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