2016
DOI: 10.1016/j.apt.2016.04.011
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Contact time at impact of spheres on large thin plates

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Cited by 32 publications
(17 citation statements)
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“…There is a substantial amount of methods for measuring collisional properties, particularly the contact time [13]. When two conducting materials are used, it is a reasonable way to measure the contact time by considering the contact as a switch, when colliding objects are connected in an electric circuit [2], [15], [16], [17], [18], [19].…”
Section: Contact Time Measuring Techniquesmentioning
confidence: 99%
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“…There is a substantial amount of methods for measuring collisional properties, particularly the contact time [13]. When two conducting materials are used, it is a reasonable way to measure the contact time by considering the contact as a switch, when colliding objects are connected in an electric circuit [2], [15], [16], [17], [18], [19].…”
Section: Contact Time Measuring Techniquesmentioning
confidence: 99%
“…Of these, PZ sensors are the most sensitive [30], making them particularly useful to detect low momentum-transfer impacts. Ball-rod [18], [27] and ball-plate [7], [8], [9], [10], [19], [31], [32], [33] experiments involving the detection of ballimpact-induced elastic waves were realized. Long-enough rods allow the elimination of the disturbance caused by the wave reflections.…”
Section: Contact Time Measuring Techniquesmentioning
confidence: 99%
“…As medições, tanto das alturas, como das velocidades, podem ser realizadas usando-se técnicasópticas [6,19] ou imagens [20,21]. O tempo necessário para inversão da velocidade (ou sentido de deslocamento) tambémé uma grandeza importante no estudo das colisões e pode ser medido a partir de experimentos com dispositivos piezelétricos [11,12], imagens de alta velocidade [11,20] ou contato elétrico [11,22]. A deformação da bola durante o impacto (compliance) e determinada pelaárea de contato na forma de círculo que decorre da deformação da bola ao chocar-se com a superfície plana (Equação 7).…”
Section: Materiais E Métodosunclassified
“…As marcas deixadas no papel apresentaram formas circulares e uniformes, cujo diâmetro foi medido com uma régua comum. Foram feitos testes preliminares que indicaram que a presença da folha de papel não altera a marca de tinta resultante do contato [22]. A incerteza da mediçãoé de ±0,5 mm.…”
Section: Materiais E Métodosunclassified
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