Effects of hole stress concentration and its mitigation on the tensile strength of sheet mould,ng compound (SMC-R50) composites

نویسنده

  • P. K. MALLICK
چکیده

The hole stress concentration effects on the tensile strength of SMC-R50 sheet moulding compound composites were studied with consideration being given to both centric and eccentric hole locations. It is shown that the tensile strength of the R50 material is improved by applying a transverse normal pressure around the hole boundary. A few preliminary experiments indicate that the fatigue life of the R50 material can also be improved by a similar technique of applying a transverse normal pressure around an open hole.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Measurement of Variation in Fracture Strength and Calculation of Stress Concentration Factor in Composite Laminates with Circular Hole

In this research, residual strength and stress concentration factor of laminated composites with a circular open hole are studied analytically, numerically and experimentally. The numerical study was carried out using the finite element method. Moreover an analytical study was carried out with developing of point stress criterion. Mechanical testing was performed to determine the un-notched ten...

متن کامل

Open-Hole Size and Thermal Cycling Effects on Mass Loss and Surface Degradation of Polymer Matrix Composites

Degradation is a common problem for polymer matrix composites (PMCs) under low thermal cycling conditions. This paper investigates the effects of low thermal cycling on total mass loss (TML) and surface degradation of PMCs. Unnotched and open-hole specimens were weighed before and after low thermal cycling. The total mass loss and surface degradation of the specimens were studied over 250 cycle...

متن کامل

Development of Natural Hemp Fibre Sheet Mould Composites (NF- SMC)

The use of natural fibres as reinforcement in polymer composites has generated much interest in recent years due to environmental legislation and improvements on natural fibre performance and process-abilities. This research investigated the use of natural hemp fibre as reinforcement for the possibility of producing fibre reinforced Sheet Moulding Compounds (SMC) as an alternative to glass fibr...

متن کامل

Mechanical Characterization of Sheet Moulding Composites for the Automotive Industry

The mechanical properties of Sheet Moulding Composite (SMC) have been analyzed by means of static and fatigue tests in tension. SMCs show a substantial in-plane anisotropy either in terms of stiffness or strength. Fatigue data were modeled adopting a fatigue model with two parameters, represented by the cyclic number and the mean stress. The statistical implementation of such model was based on...

متن کامل

Influence of Circular and Square Cut-outs on Fiber Glass/Epoxy Composite Laminate under Tensile Loading

Use of composites for a range of structural application in aircrafts, space-crafts, automobiles, etc., has widely spread in the last few years. Other than weight reduction, cut-outs provide pathways to link different aircraft parts. In this paper, an experimental investigation was conducted to study the effect of a cut-out on the tensile strength of the fiber glass/ epoxy composite plate. Geome...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003