scholarly journals Multiscale damage analysis of the tension‐tension fatigue behavior of a low‐density sheet molding compound

2020 ◽  
Vol 138 (4) ◽  
pp. 49721
Author(s):  
Mohammadali Shirinbayan
Keyword(s):  
Fatigue Behavior ◽  
Low Density ◽  
Damage Analysis ◽  
Molding Compound ◽  
Sheet Molding Compound

Preparation and Characterization of a Low Density and Low Pressure Sheet Molding Compound

2020 ◽  
Vol 1003 ◽  
pp. 98-105
Author(s):  
Min Xian Shi ◽  
Chuang Dong ◽  
Yong Zhang ◽  
Zhi Xiong Huang
Keyword(s):  
Thermal Conductivity ◽  
Flexural Strength ◽  
High Strength ◽  
Low Pressure ◽  
Molding Pressure ◽  
Low Density ◽  
Molding Compound ◽  
Sheet Molding Compound ◽  
Insulation Performance

Low Density and Low Pressure Sheet Molding Compounds (LD-LPMC) were prepared by using magnesium oxide paste and crystalline polyester as thickening system to reduce molding pressure and Hollow Glass Microspheres (HGM) as fillers to reduce the density. The molding pressure of LD-LPMC was investigated. The effects of HGM content (0%, 3.8%, 7.6%, 11.4%, 15.2%, 19.0%) on the density, flexural strength and thermal conductivity of LD-LPMC were studied. The results showed that 2-4Mpa was the best molding pressure for the composite materials. With the increase of HGM content, the density, flexural strength and thermal conductivity of LD-LPMC decreased. The thermal conductivity increased with the increase of temperature. When the molding pressure was 3Mpa and the content of the HGM was 7.6%, the density decreased by 13.6%, the flexural strength only decreased by 23.3% and the thermal conductivity (40°C) also decreased by 11.5%, which reflected the low density, high strength and good thermal insulation performance of LD-LPMC.

scholarly journals Mechanical characterization of anisotropy on a carbon fiber sheet molding compound composite under quasi-static and fatigue loading

2018 ◽  
Vol 53 (11) ◽  
pp. 1437-1457 ◽  
Author(s):  
C Nony-Davadie ◽  
L Peltier ◽  
Y Chemisky ◽  
B Surowiec ◽  
F Meraghni
Keyword(s):  
Carbon Fiber ◽  
Flow Direction ◽  
Fatigue Behavior ◽  
Fatigue Loading ◽  
Compression Process ◽  
Molding Compound ◽  
Sheet Molding Compound ◽  
Stiffness Reduction ◽  
Fiber Sheet ◽  
Carbon Fiber Sheet

The paper presents an experimental analysis of the anisotropic effects of the structural advanced carbon fiber sheet molding compound composites (AC-SMCs) subjected to quasi-static and fatigue loading. Two configurations of AC-SMC composites (randomly oriented and highly oriented) considering three different orientations (0°, 45°, 90°) with respect to the material thermo-compression flow direction are investigated under quasi-static and fatigue tensile loading. The effects of fibers orientation induced by the thermo-compression process are analyzed in terms of ultimate strength, elastic modulus, and macroscopic damage corresponding to the stiffness reduction, and related to the quasi-static and fatigue behavior. For both loading conditions, the macroscopic damage of AC-SMC randomly oriented exhibits a two-stage evolution without any damage saturation prior to the samples' failure. In addition, the difference between the highly oriented and randomly oriented configurations is pronounced especially for the 45° and 90° orientations. Post-mortem X-ray radiography and SEM observations show that damage mechanisms such as microcracks appear between and inside bundles, and their occurrence depends on the sample orientation. Experimental findings are compared with those of an equivalent advanced glass fiber reinforced sheet molding compounds composite. The degree of anisotropy is more pronounced for AC-SMC. Indeed, the dependency of the behavior during the manufacturing process induces orientation. Furthermore, the damage evolutions of the two types of SMCs have displayed different kinetics, especially for the saturation stage which is not observed for the AC-SMC composite.

Decreasing the cycle time for in‐mold coating (IMC) of sheet molding compound (SMC) compression molding

2019 ◽  
Vol 59 (6) ◽  
pp. 1158-1166 ◽  
Author(s):  
Mohammad S.K. Bhuyan ◽  
Seunghyun Ko ◽  
Maria G. Villarreal ◽  
Elliott J. Straus ◽  
Lee James ◽  
...  
Keyword(s):  
Cycle Time ◽  
Compression Molding ◽  
Molding Compound ◽  
Sheet Molding Compound
Sign in / Sign up

Export Citation Format

Share Document