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- W3148490496 abstract "Impact resistance was defined as the buffering capacity of materials, it mainly depends on two kinds of material behaviour. The first is crack-extension speed, the lower the speed, the higher the impact resistance. The second is limit strain of materials. which is in proportion to impact resistance. According to the points mentioned above, an expression of impact resistance was derived as R=A(KIC /σt,)2σt/E.Brittleness of solid was defined as the reciprocal of impact resistance, it represents the brittle degree of materials ie. B=1/ R. Impact resistance or brittleness does not reflect the ability to resist impact force. Impact modulus (IM) was presented to describe the ability, it is impact resistance multiplied by strength. IM= R·σt=AK/ E=σt/B. In fact, IM represents the impact fracture energy in general process zone, it is a most important parameter for the reliability of brittle components.It is emphased that the brittle degree of solid depends not only on the value of fracture toughness, but on the ratio of toughness to strength and elastic modulus. The brittleness and impact modulus for different materials can be evaluated by using relative brittleness. The criteria for brittleness improvement of materials can be expressed as followes: if α2b.c brittleness decrease, if α2=b.c no change for brittleness, if a2b.c brittleness increase. in which,α=toughness/ original toughness; b=strength/original strength, c=elastic modulus/original elastic molulus. The criteria for improvement of impact modulus is: if a2c impact modulus increase, if a2c impact modulus decrease.The brittleness, impact reSistance and impact modulus of eleven kinds of materials were measured and calculated." @default.
- W3148490496 created "2021-04-13" @default.
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- W3148490496 date "1994-01-01" @default.
- W3148490496 modified "2023-09-25" @default.
- W3148490496 title "QUANTIZATION OF BRITTLENESS AND IMPACT MODULUS" @default.
- W3148490496 hasPublicationYear "1994" @default.
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